<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  11.2.0.5 -->
<!--Based on XBRL 2.1-->
<!--Created on: 3/30/2026 10:27:19 AM-->
<!--Modified on: 3/30/2026 10:27:19 AM-->
<xsd:schema xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:srt="http://fasb.org/srt/2025" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://meiragtx.com/20251231" elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:attributeFormDefault="unqualified" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:mgtx="http://meiragtx.com/20251231" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:ecd="http://xbrl.sec.gov/ecd/2025" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2025" xmlns:cyd-af-sub="http://xbrl.sec.gov/cyd-af-sub/2025" xmlns:cyd="http://xbrl.sec.gov/cyd/2025">
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/StatementConsolidatedBalanceSheets" id="StatementConsolidatedBalanceSheets">
        <link:definition>995200100 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss" id="StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss">
        <link:definition>995200200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/StatementConsolidatedStatementsOfCashFlows" id="StatementConsolidatedStatementsOfCashFlows">
        <link:definition>995200400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAssetsAndLiabilitiesMeasuredAtFairValueDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAssetsAndLiabilitiesMeasuredAtFairValueDetails">
        <link:definition>99940202 - Disclosure - Summary of Significant Accounting Policies - Assets and Liabilities Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePrepaidExpensesSummaryOfPrepaidExpensesDetails" id="DisclosurePrepaidExpensesSummaryOfPrepaidExpensesDetails">
        <link:definition>99940401 - Disclosure - Prepaid Expenses - Summary of Prepaid Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePropertyPlantAndEquipmentNetDetails" id="DisclosurePropertyPlantAndEquipmentNetDetails">
        <link:definition>99940501 - Disclosure - Property, Plant and Equipment, net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIntangibleAssetsNetDetails" id="DisclosureIntangibleAssetsNetDetails">
        <link:definition>99940601 - Disclosure - Intangible Assets, net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIntangibleAssetsNetAmortizationExpenseDetails" id="DisclosureIntangibleAssetsNetAmortizationExpenseDetails">
        <link:definition>99940602 - Disclosure - Intangible Assets, net - Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureAccruedExpensesScheduleOfAccruedExpensesDetails" id="DisclosureAccruedExpensesScheduleOfAccruedExpensesDetails">
        <link:definition>99940701 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureOtherCurrentLiabilitiesDetails" id="DisclosureOtherCurrentLiabilitiesDetails">
        <link:definition>99940801 - Disclosure - Other Current Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeaseObligationsScheduleOfFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetailCalc2" id="DisclosureLeaseObligationsScheduleOfFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetailCalc2">
        <link:definition>40907 - Disclosure - Lease Obligations - Schedule of Future Minimum Lease Payments Under Non-cancellable Leases (Detail) -Calc2</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxBenefitWithAmountsAtUkStatutoryIncomeTaxRateDetails" id="DisclosureIncomeTaxesReconciliationOfIncomeTaxBenefitWithAmountsAtUkStatutoryIncomeTaxRateDetails">
        <link:definition>99941103 - Disclosure - Income Taxes - Reconciliation of Income Tax Benefit with Amounts at U.K. Statutory Income Tax Rate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails" id="DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails">
        <link:definition>99941105 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesScheduleOfComponentsOfLeaseCostDetails" id="DisclosureLeasesScheduleOfComponentsOfLeaseCostDetails">
        <link:definition>99941301 - Disclosure - Leases - Schedule of Components of Lease Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesScheduleOfFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetails" id="DisclosureLeasesScheduleOfFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetails">
        <link:definition>99941304 - Disclosure - Leases - Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/StatementConsolidatedStatementsOfShareholdersDeficitEquity" id="StatementConsolidatedStatementsOfShareholdersDeficitEquity">
        <link:definition>995200300 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' (DEFICIT) EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationTables" id="DisclosureShareBasedCompensationTables">
        <link:definition>99930903 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactionsTables" id="DisclosureRelatedPartyTransactionsTables">
        <link:definition>99931203 - Disclosure - Related Party Transactions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePrincipalBusinessActivityDetails" id="DisclosurePrincipalBusinessActivityDetails">
        <link:definition>99940101 - Disclosure - Principal Business Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTaxIncentivesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesTaxIncentivesDetails">
        <link:definition>99940201 - Disclosure - Summary of Significant Accounting Policies - Tax Incentives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfAssetsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfAssetsDetails">
        <link:definition>99940203 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAssetRetirementObligationsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAssetRetirementObligationsDetails">
        <link:definition>99940204 - Disclosure - Summary of Significant Accounting Policies - Asset Retirement Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesIdaIrelandGrantDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesIdaIrelandGrantDetails">
        <link:definition>99940205 - Disclosure - Summary of Significant Accounting Policies - IDA Ireland Grant (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails">
        <link:definition>99940206 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesIncomeTaxesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesIncomeTaxesDetails">
        <link:definition>99940207 - Disclosure - Summary of Significant Accounting Policies - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAntiDilutiveSecuritiesExcludedFromEpsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAntiDilutiveSecuritiesExcludedFromEpsDetails">
        <link:definition>99940208 - Disclosure - Summary of Significant Accounting Policies - Anti-dilutive Securities Excluded from EPS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesNonCurrentAssetsByGeographicalAreaDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesNonCurrentAssetsByGeographicalAreaDetails">
        <link:definition>99940210 - Disclosure - Summary of Significant Accounting Policies - Non-Current Assets by Geographical Area (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEquityMethodAndOtherInvestmentsSummaryOfInvestmentsDetails" id="DisclosureEquityMethodAndOtherInvestmentsSummaryOfInvestmentsDetails">
        <link:definition>99940301 - Disclosure - Equity Method and Other Investments - Summary of Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEquityMethodAndOtherInvestmentsAdditionalInformationDetails" id="DisclosureEquityMethodAndOtherInvestmentsAdditionalInformationDetails">
        <link:definition>99940302 - Disclosure - Equity Method and Other Investments - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePropertyPlantAndEquipmentNetAdditionalInformationDetails" id="DisclosurePropertyPlantAndEquipmentNetAdditionalInformationDetails">
        <link:definition>99940502 - Disclosure - Property, Plant and Equipment, net - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationScheduleOfGrantDateFairValuesOfShareOptionsGrantedBlackScholesValuationModelDetails" id="DisclosureShareBasedCompensationScheduleOfGrantDateFairValuesOfShareOptionsGrantedBlackScholesValuationModelDetails">
        <link:definition>99940902 - Disclosure - Share-Based Compensation - Schedule of Grant Date Fair Values of the Share Options Granted Black-Scholes Valuation Model (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationSummaryOfRestrictedShareUnitsDetails" id="DisclosureShareBasedCompensationSummaryOfRestrictedShareUnitsDetails">
        <link:definition>99940903 - Disclosure - Share-Based Compensation - Summary of Restricted Share Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationScheduleOfShareBasedCompensationExpenseDetails" id="DisclosureShareBasedCompensationScheduleOfShareBasedCompensationExpenseDetails">
        <link:definition>99940904 - Disclosure - Share-Based Compensation - Schedule of Share-Based Compensation Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationAdditionalInformationDetails" id="DisclosureShareBasedCompensationAdditionalInformationDetails">
        <link:definition>99940905 - Disclosure - Share-Based Compensation - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureOrdinarySharesDetails" id="DisclosureOrdinarySharesDetails">
        <link:definition>99941001 - Disclosure - Ordinary Shares (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesDetails" id="DisclosureIncomeTaxesDetails">
        <link:definition>99941101 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesSummaryOfNetOperatingLossCarryforwardsDetails" id="DisclosureIncomeTaxesSummaryOfNetOperatingLossCarryforwardsDetails">
        <link:definition>99941102 - Disclosure - Income Taxes - Summary of Net Operating Loss Carryforwards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesIncomeTaxComponentsDetails" id="DisclosureIncomeTaxesIncomeTaxComponentsDetails">
        <link:definition>99941104 - Disclosure - Income Taxes - Income Tax Components (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesAdditionalInformationDetails" id="DisclosureIncomeTaxesAdditionalInformationDetails">
        <link:definition>99941107 - Disclosure - Income Taxes - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactionsCollaborationAndLicenseAgreementsDetails" id="DisclosureRelatedPartyTransactionsCollaborationAndLicenseAgreementsDetails">
        <link:definition>99941201 - Disclosure - Related Party Transactions - Collaboration and License Agreements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactionsPerformanceObligationDetails" id="DisclosureRelatedPartyTransactionsPerformanceObligationDetails">
        <link:definition>99941202 - Disclosure - Related Party Transactions - Performance Obligation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactionsFinancingAgreementDetails" id="DisclosureRelatedPartyTransactionsFinancingAgreementDetails">
        <link:definition>99941203 - Disclosure - Related Party Transactions - Financing Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactionsRevenueRecognitionDetails" id="DisclosureRelatedPartyTransactionsRevenueRecognitionDetails">
        <link:definition>99941204 - Disclosure - Related Party Transactions - Revenue Recognition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesAdditionalInformationDetails" id="DisclosureLeasesAdditionalInformationDetails">
        <link:definition>99941305 - Disclosure - Leases - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureDebtFinancingDetails" id="DisclosureDebtFinancingDetails">
        <link:definition>99941401 - Disclosure - Debt Financing (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>99941501 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" id="DisclosureEmployeeBenefitPlansAdditionalInformationDetails">
        <link:definition>99941601 - Disclosure - Employee Benefit Plans - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSubsequentEventDetails" id="DisclosureSubsequentEventDetails">
        <link:definition>99941701 - Disclosure - Subsequent Event - (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>995200090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/StatementConsolidatedBalanceSheetsParenthetical" id="StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePrincipalBusinessActivity" id="DisclosurePrincipalBusinessActivity">
        <link:definition>995210101 - Disclosure - Principal Business Activity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPolicies" id="DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>995210201 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEquityMethodAndOtherInvestments" id="DisclosureEquityMethodAndOtherInvestments">
        <link:definition>995210301 - Disclosure - Equity Method and Other Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePrepaidExpenses" id="DisclosurePrepaidExpenses">
        <link:definition>995210401 - Disclosure - Prepaid Expenses</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePropertyPlantAndEquipmentNet" id="DisclosurePropertyPlantAndEquipmentNet">
        <link:definition>995210501 - Disclosure - Property, Plant and Equipment, net</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIntangibleAssetsNet" id="DisclosureIntangibleAssetsNet">
        <link:definition>995210601 - Disclosure - Intangible Assets, net</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureAccruedExpenses" id="DisclosureAccruedExpenses">
        <link:definition>995210701 - Disclosure - Accrued Expenses</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureOtherCurrentLiabilities" id="DisclosureOtherCurrentLiabilities">
        <link:definition>995210801 - Disclosure - Other Current Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensation" id="DisclosureShareBasedCompensation">
        <link:definition>995210901 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureOrdinaryShares" id="DisclosureOrdinaryShares">
        <link:definition>995211001 - Disclosure - Ordinary Shares</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxes" id="DisclosureIncomeTaxes">
        <link:definition>995211101 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureRelatedPartyTransactions" id="DisclosureRelatedPartyTransactions">
        <link:definition>995211201 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeases" id="DisclosureLeases">
        <link:definition>995211301 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureDebtFinancing" id="DisclosureDebtFinancing">
        <link:definition>995211401 - Disclosure - Debt Financing</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>995211501 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEmployeeBenefitPlans" id="DisclosureEmployeeBenefitPlans">
        <link:definition>995211601 - Disclosure - Employee Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSubsequentEvent" id="DisclosureSubsequentEvent">
        <link:definition>995211701 - Disclosure - Subsequent Event</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>99920202 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>99930203 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureEquityMethodAndOtherInvestmentsTables" id="DisclosureEquityMethodAndOtherInvestmentsTables">
        <link:definition>99930303 - Disclosure - Equity Method and Other Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePrepaidExpensesTables" id="DisclosurePrepaidExpensesTables">
        <link:definition>99930403 - Disclosure - Prepaid Expenses (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosurePropertyPlantAndEquipmentNetTables" id="DisclosurePropertyPlantAndEquipmentNetTables">
        <link:definition>99930503 - Disclosure - Property, Plant and Equipment, net (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIntangibleAssetsNetTables" id="DisclosureIntangibleAssetsNetTables">
        <link:definition>99930603 - Disclosure - Intangible Assets, net (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureAccruedExpensesTables" id="DisclosureAccruedExpensesTables">
        <link:definition>99930703 - Disclosure - Accrued Expenses (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureOtherCurrentLiabilitiesTables" id="DisclosureOtherCurrentLiabilitiesTables">
        <link:definition>99930803 - Disclosure - Other Current Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesTables" id="DisclosureIncomeTaxesTables">
        <link:definition>99931103 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesTables" id="DisclosureLeasesTables">
        <link:definition>99931303 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureSummaryOfSignificantAccountingPoliciesNetLossForSegmentDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesNetLossForSegmentDetails">
        <link:definition>99940209 - Disclosure - Summary of Significant Accounting Policies - Net Loss for the Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureShareBasedCompensationSummaryOfCompanySShareOptionActivityDetails" id="DisclosureShareBasedCompensationSummaryOfCompanySShareOptionActivityDetails">
        <link:definition>99940901 - Disclosure - Share-Based Compensation - Summary of Company's Share Option Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureIncomeTaxesUnrecognizedTaxPositionsDetails" id="DisclosureIncomeTaxesUnrecognizedTaxPositionsDetails">
        <link:definition>99941106 - Disclosure - Income Taxes - Unrecognized Tax Positions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesScheduleOfConsolidatedBalanceSheetsForLeasesDetails" id="DisclosureLeasesScheduleOfConsolidatedBalanceSheetsForLeasesDetails">
        <link:definition>99941302 - Disclosure - Leases - Schedule of Consolidated Balance Sheets for Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://meiragtx.com/role/DisclosureLeasesScheduleOfOtherInformationRelatedToLeasesDetails" id="DisclosureLeasesScheduleOfOtherInformationRelatedToLeasesDetails">
        <link:definition>99941303 - Disclosure - Leases - Schedule of Other Information Related to Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:href="mgtx-20251231_cal.xml" xlink:title="Calculation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:href="mgtx-20251231_def.xml" xlink:title="Definition Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:href="mgtx-20251231_lab.xml" xlink:title="Label Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:href="mgtx-20251231_pre.xml" xlink:title="Presentation Links, all" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="https://xbrl.org/2023/calculation-1.1" schemaLocation="https://www.xbrl.org/2023/calculation-1.1.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd-sub/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-sub-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/cyd/2025" schemaLocation="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/cyd-af-sub/2025" schemaLocation="https://xbrl.sec.gov/cyd/2025/cyd-af-sub-2025.xsd" />
  <xsd:element name="AccruedClinicalTrialCosts" id="mgtx_AccruedClinicalTrialCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="AccruedLiabilitiesAccruedCompensationAndBenefits" id="mgtx_AccruedLiabilitiesAccruedCompensationAndBenefits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="AccruedResearchAndDevelopment" id="mgtx_AccruedResearchAndDevelopment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="CompensationAndRetirementDisclosureLineItems" id="mgtx_CompensationAndRetirementDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="CompensationAndRetirementDisclosureTable" id="mgtx_CompensationAndRetirementDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" />
  <xsd:element id="mgtx_DefinedContributionPlanEmployeeEligibilityAge" name="DefinedContributionPlanEmployeeEligibilityAge" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="FirstAnniversaryMember" id="mgtx_FirstAnniversaryMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="JanssenPharmaceuticalsIncMember" id="mgtx_JanssenPharmaceuticalsIncMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="OverThreeYearsMember" id="mgtx_OverThreeYearsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="PrepaidClinicalTrialCost" id="mgtx_PrepaidClinicalTrialCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="PrepaidDuesAndLicenseFees" id="mgtx_PrepaidDuesAndLicenseFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element name="RestrictedCashMember" id="mgtx_RestrictedCashMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <xsd:element id="mgtx_StockIssuedDuringPeriodSharesLicenseAgreement" name="StockIssuedDuringPeriodSharesLicenseAgreement" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mgtx_StockIssuedDuringPeriodValueLicenseAgreement" name="StockIssuedDuringPeriodValueLicenseAgreement" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="mgtx_RightOfUseAsset" name="RightOfUseAsset" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="mgtx_LeaseObligationsCurrent" name="LeaseObligationsCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="mgtx_LeaseObligationsNonCurrent" name="LeaseObligationsNonCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="mgtx_LeaseMaturityTerm" name="LeaseMaturityTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mgtx_OperatingLeaseAbstract" name="OperatingLeaseAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_FinanceLeaseAbstract" name="FinanceLeaseAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_WeightedAverageDiscountRateAbstract" name="WeightedAverageDiscountRateAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" name="RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_PrepaidManufacturingCostsCurrent" name="PrepaidManufacturingCostsCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="mgtx_TaxIncentiveReceivable" name="TaxIncentiveReceivable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="mgtx_AccruedLiabilitiesAccruedManufacturingCostsExpense" name="AccruedLiabilitiesAccruedManufacturingCostsExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="mgtx_ThirdAnniversaryMember" name="ThirdAnniversaryMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_FourthAnniversaryMember" name="FourthAnniversaryMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_SecondAnniversaryMember" name="SecondAnniversaryMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_JohnsonAndJohnsonInnovationJjdcIncMember" name="JohnsonAndJohnsonInnovationJjdcIncMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_ContractWithCustomerLiabilityEffectOfExchangeRate" name="ContractWithCustomerLiabilityEffectOfExchangeRate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" abstract="false" />
  <xsd:element id="mgtx_FinanceLeasePayments" name="FinanceLeasePayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="mgtx_AtMarketOfferingMember" name="AtMarketOfferingMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_DefinedContributionPlanEmployerContributionExclusiveOfEmployeeMatchPercent" name="DefinedContributionPlanEmployerContributionExclusiveOfEmployeeMatchPercent" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="mgtx_VisiogeneLlcMember" name="VisiogeneLlcMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="mgtx_LicenseAndInvestmentAgreementNumberOfPreferredUnitsAcquired" name="LicenseAndInvestmentAgreementNumberOfPreferredUnitsAcquired" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="InvestmentsAllocatedAmountExpensed" id="mgtx_InvestmentsAllocatedAmountExpensed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsToAcquireInvestmentsAllocation" id="mgtx_PaymentsToAcquireInvestmentsAllocation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="VisiogeneLicenseAgreementMember" id="mgtx_VisiogeneLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="VisiogeneUnitAgreementMember" id="mgtx_VisiogeneUnitAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BuildingOneMember" id="mgtx_BuildingOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BuildingTwoMember" id="mgtx_BuildingTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExcessTaxBenefitFromShareBasedCompensationFinancingActivities1" id="mgtx_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ExcessTaxBenefitFromShareBasedCompensationOperatingActivities1" id="mgtx_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerceptiveCreditHoldingsMember" id="mgtx_PerceptiveCreditHoldingsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TermLoanMember" id="mgtx_TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BasisSpreadOnVariableRateFloor" id="mgtx_BasisSpreadOnVariableRateFloor" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SecuredOvernightFinancingRateAdjustmentTerm" id="mgtx_SecuredOvernightFinancingRateAdjustmentTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SecuredCashAndBankAccounts" id="mgtx_SecuredCashAndBankAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SharesIssuedInConnectionWithFinancingAgreement" id="mgtx_SharesIssuedInConnectionWithFinancingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ExercisePriceScenarioMember" id="mgtx_ExercisePriceScenarioMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExercisePriceScenarioBMember" id="mgtx_ExercisePriceScenarioBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PerceptiveAdvisorsLlcMember" id="mgtx_PerceptiveAdvisorsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FinancingAgreementMember" id="mgtx_FinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityIncentives2018PlanMember" id="mgtx_EquityIncentives2018PlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AnnualPercentIncreaseInAvailableSharesUnderEquityIncentivePlan" id="mgtx_AnnualPercentIncreaseInAvailableSharesUnderEquityIncentivePlan" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="OtherEquityMethodInvestmentsMember" id="mgtx_OtherEquityMethodInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedContributionPlanAnnualContributionsPerEmployeePercent" id="mgtx_DefinedContributionPlanAnnualContributionsPerEmployeePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DefinedBenefitPlanEmployerMatchingContributionPercent" id="mgtx_DefinedBenefitPlanEmployerMatchingContributionPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DefinedBenefitsPlanPlanAssetsContributionsByEmployer" id="mgtx_DefinedBenefitsPlanPlanAssetsContributionsByEmployer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CollaborationAgreementFundingReceived" id="mgtx_CollaborationAgreementFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingReceived" id="mgtx_MilestoneFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInAcquiredInProcessResearchAndDevelopmentAssets" id="mgtx_IncreaseDecreaseInAcquiredInProcessResearchAndDevelopmentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DeferredRevenueRecognizedDuringPeriod" id="mgtx_DeferredRevenueRecognizedDuringPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicenseRevenueFromRelatedParties" id="mgtx_LicenseRevenueFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfIrelandGrantsPolicyTextBlock" id="mgtx_ScheduleOfIrelandGrantsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RecentAccountingPronouncementsAdoptedPolicyTextBlock" id="mgtx_RecentAccountingPronouncementsAdoptedPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GainLossOnSaleOfNonfinancialAssets" id="mgtx_GainLossOnSaleOfNonfinancialAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AssetPurchaseAgreementMember" id="mgtx_AssetPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AssetPurchaseAgreementFundingReceived" id="mgtx_AssetPurchaseAgreementFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ContingentFundingAvailable" id="mgtx_ContingentFundingAvailable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForDevelopmentOfDrugSubstances" id="mgtx_MilestoneFundingForDevelopmentOfDrugSubstances" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForDevelopmentOfDrugProducts" id="mgtx_MilestoneFundingForDevelopmentOfDrugProducts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForSaleOfDrugProductsInUnitedStates" id="mgtx_MilestoneFundingForSaleOfDrugProductsInUnitedStates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForSaleOfDrugProductsInUkFranceGermanySpainAndItaly" id="mgtx_MilestoneFundingForSaleOfDrugProductsInUkFranceGermanySpainAndItaly" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForTransferOfManufacturingTechnology" id="mgtx_MilestoneFundingForTransferOfManufacturingTechnology" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForRegulatoryApproval" id="mgtx_MilestoneFundingForRegulatoryApproval" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrantsIdaIrelandMember" id="mgtx_GrantsIdaIrelandMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GrantsIdaIrelandEmploymentMember" id="mgtx_GrantsIdaIrelandEmploymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GrantsIdaIrelandCapitalMember" id="mgtx_GrantsIdaIrelandCapitalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GrantAmountForJobCreation" id="mgtx_GrantAmountForJobCreation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrantAmountForMachineryAndEquipment" id="mgtx_GrantAmountForMachineryAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrantsForMachineryAndEquipmentAsPercentageOfTotalCostToMake" id="mgtx_GrantsForMachineryAndEquipmentAsPercentageOfTotalCostToMake" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfNewJobsCreatedToReceiveGrantFunding" id="mgtx_NumberOfNewJobsCreatedToReceiveGrantFunding" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="FinancialAssistanceDurationFromLastGrantPayment" id="mgtx_FinancialAssistanceDurationFromLastGrantPayment" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FinancialAssistanceDurationFromCompletionOfCapitalInvestment" id="mgtx_FinancialAssistanceDurationFromCompletionOfCapitalInvestment" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExpenditureRequirementForGrantFundingOnEligibleMachineryAndEquipment" id="mgtx_ExpenditureRequirementForGrantFundingOnEligibleMachineryAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GrantFundingReceived" id="mgtx_GrantFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrantFundingRecognizedAsIncome" id="mgtx_GrantFundingRecognizedAsIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PeriodOfJobVacancyBeforeGrantFundingBecomesRepayable" id="mgtx_PeriodOfJobVacancyBeforeGrantFundingBecomesRepayable" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfExpendituresReimbursableFromRelatedParties" id="mgtx_PercentageOfExpendituresReimbursableFromRelatedParties" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AgreementTerminationPeriodDaysWrittenNotice" id="mgtx_AgreementTerminationPeriodDaysWrittenNotice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="InitialAgreementPeriodDuration" id="mgtx_InitialAgreementPeriodDuration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LicenseAgreementUclbRpgrMember" id="mgtx_LicenseAgreementUclbRpgrMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RelatedPartyDeferredRevenueReclassified" id="mgtx_RelatedPartyDeferredRevenueReclassified" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AssetPurchaseAgreementFundingReclassified" id="mgtx_AssetPurchaseAgreementFundingReclassified" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="VariableConsiderationForServices" id="mgtx_VariableConsiderationForServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ContractPriceOfLicenseAgreement" id="mgtx_ContractPriceOfLicenseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RecognizedRelatedPartyDeferredRevenue" id="mgtx_RecognizedRelatedPartyDeferredRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfAmountsReportedInConsolidatedBalanceSheetsForLeasesTableTextBlock" id="mgtx_ScheduleOfAmountsReportedInConsolidatedBalanceSheetsForLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ScheduleOfFutureMinimumPaymentsUnderNonCancellableLeasesTableTextBlock" id="mgtx_ScheduleOfFutureMinimumPaymentsUnderNonCancellableLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProceedsFromGainOnSaleOfNonfinancialAssets" id="mgtx_ProceedsFromGainOnSaleOfNonfinancialAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingForExtensionOfClinicalTrials" id="mgtx_MilestoneFundingForExtensionOfClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MaturityPeriodOfHighlyLiquidInvestmentsClassifiedAsCashAndCashEquivalents" id="mgtx_MaturityPeriodOfHighlyLiquidInvestmentsClassifiedAsCashAndCashEquivalents" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OffsettingCreditForTransitionServices" id="mgtx_OffsettingCreditForTransitionServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerformanceObligationForProcessPerformanceQualificationServices" id="mgtx_PerformanceObligationForProcessPerformanceQualificationServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerformanceObligationForCommercialSupplyOfRpgrProduct" id="mgtx_PerformanceObligationForCommercialSupplyOfRpgrProduct" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerformanceObligationForManufacturingTechnologyTransfer" id="mgtx_PerformanceObligationForManufacturingTechnologyTransfer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerformanceObligationForSaleOfNonfinancialAssets" id="mgtx_PerformanceObligationForSaleOfNonfinancialAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ServiceRevenueFromRelatedParties" id="mgtx_ServiceRevenueFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AssetRetirementObligationsAmortizationOfInterest" id="mgtx_AssetRetirementObligationsAmortizationOfInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BankOfAmericaSecuritiesInc.Member" id="mgtx_BankOfAmericaSecuritiesInc.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MilestoneFundingAllocatedToProcessPerformanceQualificationServices" id="mgtx_MilestoneFundingAllocatedToProcessPerformanceQualificationServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingAllocatedToCommercialSupplyOfRpgrProduct" id="mgtx_MilestoneFundingAllocatedToCommercialSupplyOfRpgrProduct" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingAllocatedToManufacturingTechnologyTransfer" id="mgtx_MilestoneFundingAllocatedToManufacturingTechnologyTransfer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingAllocatedToSaleOfNonfinancialAssets" id="mgtx_MilestoneFundingAllocatedToSaleOfNonfinancialAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ServiceRevenueRelatedPartyMember" id="mgtx_ServiceRevenueRelatedPartyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IssuanceOfSharesInConnectionWithPrivatePlacementOffering" id="mgtx_IssuanceOfSharesInConnectionWithPrivatePlacementOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IssuanceOfSharesInConnectionWithPrivatePlacementOfferingShares" id="mgtx_IssuanceOfSharesInConnectionWithPrivatePlacementOfferingShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OperatingLeaseNumberNewLeasesRecognized" id="mgtx_OperatingLeaseNumberNewLeasesRecognized" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IssuanceOfSharesInConnectionWithRegisteredOffering" id="mgtx_IssuanceOfSharesInConnectionWithRegisteredOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IssuanceOfSharesInConnectionWithRegisteredOfferingShares" id="mgtx_IssuanceOfSharesInConnectionWithRegisteredOfferingShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IssuanceCostsInConnectionWithRegisteredOffering" id="mgtx_IssuanceCostsInConnectionWithRegisteredOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AlexandriaForbesPhdMember" id="mgtx_AlexandriaForbesPhdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RichardGirouxMember" id="mgtx_RichardGirouxMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AlexandraForbesStockTradingPlanMember" id="mgtx_AlexandraForbesStockTradingPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RichardGirouxStockTradingPlanMember" id="mgtx_RichardGirouxStockTradingPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractWithCustomerLiabilityOtherAmountsCollectedOrInvoiced" id="mgtx_ContractWithCustomerLiabilityOtherAmountsCollectedOrInvoiced" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccreditedInvestorMember" id="mgtx_AccreditedInvestorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityFinancingMember" id="mgtx_EquityFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SalesAgreementMember" id="mgtx_SalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueUnsatisfiedPerformanceObligationAmount" id="mgtx_RevenueUnsatisfiedPerformanceObligationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueUnsatisfiedPerformanceObligationExpectedRecognitionPeriod" id="mgtx_RevenueUnsatisfiedPerformanceObligationExpectedRecognitionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ResearchAndDevelopmentClinicalTrials" id="mgtx_ResearchAndDevelopmentClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentManufacturing" id="mgtx_ResearchAndDevelopmentManufacturing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentOther" id="mgtx_ResearchAndDevelopmentOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OtherSegmentItemsIncomeStatement" id="mgtx_OtherSegmentItemsIncomeStatement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="VestedSharesDeferred" id="mgtx_VestedSharesDeferred" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ClinicalProgramsDrugProduct1" id="mgtx_ClinicalProgramsDrugProduct1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClinicalProgramsDrugProduct2" id="mgtx_ClinicalProgramsDrugProduct2" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClinicalProgramsDrugProduct3" id="mgtx_ClinicalProgramsDrugProduct3" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClinicalProgramsDrugProduct4" id="mgtx_ClinicalProgramsDrugProduct4" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PreClinicalResearchGeneRegulation" id="mgtx_PreClinicalResearchGeneRegulation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PreClinicalResearchNeurodegenerativeDiseases" id="mgtx_PreClinicalResearchNeurodegenerativeDiseases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PreClinicalResearchPreclinicalOcularDiseases" id="mgtx_PreClinicalResearchPreclinicalOcularDiseases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SegmentNetIncomeLoss" id="mgtx_SegmentNetIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SegmentGeneralAndAdministrativeExpenses" id="mgtx_SegmentGeneralAndAdministrativeExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingUpfrontPaymentReceived" id="mgtx_MilestoneFundingUpfrontPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MilestoneFundingToProvideAdditionalCapital" id="mgtx_MilestoneFundingToProvideAdditionalCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="HologenTransactionAgreementMember" id="mgtx_HologenTransactionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="HologenLimitedMember" id="mgtx_HologenLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassSharesOfHologenReceivedInTransaction" id="mgtx_ClassSharesOfHologenReceivedInTransaction" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ClassShareOwnershipPercentageOfHologenNeuro" id="mgtx_ClassShareOwnershipPercentageOfHologenNeuro" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassBShareOwnershipPercentageOfHologenNeuro" id="mgtx_ClassBShareOwnershipPercentageOfHologenNeuro" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageApprovalOfDirectors" id="mgtx_PercentageApprovalOfDirectors" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PurchaseOptionAfterTwelveMonthsPercentageOfCompanySOutstandingCommonShares" id="mgtx_PurchaseOptionAfterTwelveMonthsPercentageOfCompanySOutstandingCommonShares" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ManufacturingFrameworkAgreementMember" id="mgtx_ManufacturingFrameworkAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RepurchaseOptionVestingPeriod" id="mgtx_RepurchaseOptionVestingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RelatedPartyServiceRevenueMember" id="mgtx_RelatedPartyServiceRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdditionalMilestonePaymentReceived" id="mgtx_AdditionalMilestonePaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IssuanceCostReversal" id="mgtx_IssuanceCostReversal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EliLillyAndCompanyMember" id="mgtx_EliLillyAndCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EliLillyAndCompanyCollaborationAgreementMember" id="mgtx_EliLillyAndCompanyCollaborationAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MilestoneFundingAvailableUponCertainDevelopmentAndRegulatoryApprovals" id="mgtx_MilestoneFundingAvailableUponCertainDevelopmentAndRegulatoryApprovals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ChangeInRightOfUseAssets" id="mgtx_ChangeInRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ChangeInLeaseLiabilities" id="mgtx_ChangeInLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PropertyPlantAndEquipmentNotSubjectToDepreciation" id="mgtx_PropertyPlantAndEquipmentNotSubjectToDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UpfrontPaymentLiabilitiesCurrent" id="mgtx_UpfrontPaymentLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StuartNaylorMember" id="mgtx_StuartNaylorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GainLossOnReleaseOfAssetRetirementObligationAndWriteOffOfLeaseholdImprovements" id="mgtx_GainLossOnReleaseOfAssetRetirementObligationAndWriteOffOfLeaseholdImprovements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProvisionGainLossForObsoleteAndExcessInventory" id="mgtx_ProvisionGainLossForObsoleteAndExcessInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationCompensationLimitationAdjustmentAmount" id="mgtx_EffectiveIncomeTaxRateReconciliationCompensationLimitationAdjustmentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestAmount" id="mgtx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationCompensationLimitationAdjustmentPercent" id="mgtx_EffectiveIncomeTaxRateReconciliationCompensationLimitationAdjustmentPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestPercent" id="mgtx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareRepurchaseProgramLiability" id="mgtx_ShareRepurchaseProgramLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShareRepurchaseAgreementWithPerceptiveLifeSciencesMasterFundLtdMember" id="mgtx_ShareRepurchaseAgreementWithPerceptiveLifeSciencesMasterFundLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncomeTaxJurisdictionForeignFederalUnitedStatesMember" id="mgtx_IncomeTaxJurisdictionForeignFederalUnitedStatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncomeTaxJurisdictionForeignStateAndLocalUnitedStatesMember" id="mgtx_IncomeTaxJurisdictionForeignStateAndLocalUnitedStatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OperatingLossCarryforwardsSubjectToExpiration" id="mgtx_OperatingLossCarryforwardsSubjectToExpiration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RightOfUseAssetObtainedInExchangeForLeaseLiability" id="mgtx_RightOfUseAssetObtainedInExchangeForLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtInstrumentRedemptionAgreedToRedeemAmount" id="mgtx_DebtInstrumentRedemptionAgreedToRedeemAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FundingReceivable" id="mgtx_FundingReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtInstrumentPrincipalAmountAmountToRedeem" id="mgtx_DebtInstrumentPrincipalAmountAmountToRedeem" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
</xsd:schema>
