<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  11.4.0.1 -->
<!--Based on XBRL 2.1-->
<!--Created on: 8/13/2026 12:11:49 PM-->
<!--Modified on: 8/13/2026 12:11:49 PM-->
<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/20260630" 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/20260630" 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">
  <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/StatementCondensedConsolidatedBalanceSheets" id="StatementCondensedConsolidatedBalanceSheets">
        <link:definition>995200100 - Statement - CONDENSED 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/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" id="StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss">
        <link:definition>995200200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (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/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLossCalc2" id="StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeLossCalc2">
        <link:definition>00205 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) Calc 2</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/StatementCondensedConsolidatedStatementsOfCashFlows" id="StatementCondensedConsolidatedStatementsOfCashFlows">
        <link:definition>995200400 - Statement - CONDENSED 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsRestrictedCashAndFairValueMeasurementsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsRestrictedCashAndFairValueMeasurementsDetails">
        <link:definition>99940201 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Restricted Cash and Fair Value Measurements (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>99940401 - 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/DisclosureEarningsPerShareDetails" id="DisclosureEarningsPerShareDetails">
        <link:definition>99940801 - Disclosure - Earnings Per Share (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/DisclosureLeasesScheduleOfComponentsOfLeaseCostDetails" id="DisclosureLeasesScheduleOfComponentsOfLeaseCostDetails">
        <link:definition>99941102 - 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>99941105 - 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/StatementCondensedConsolidatedStatementOfShareholdersEquity" id="StatementCondensedConsolidatedStatementOfShareholdersEquity">
        <link:definition>995200300 - Statement - CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' 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>99930603 - 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>99931003 - 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/DisclosureOrganizationAndBasisOfPresentationDetails" id="DisclosureOrganizationAndBasisOfPresentationDetails">
        <link:definition>99940101 - Disclosure - Organization and Basis of Presentation (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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsFinancialAssetsAndLiabilitiesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsFinancialAssetsAndLiabilitiesDetails">
        <link:definition>99940202 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Financial 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsEstimateFairValueDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsEstimateFairValueDetails">
        <link:definition>99940203 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Estimate 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsAssetRetirementObligationsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsAssetRetirementObligationsDetails">
        <link:definition>99940204 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsIdaIrelandGrantDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsIdaIrelandGrantDetails">
        <link:definition>99940205 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsNetIncomeLossForSegmentDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsNetIncomeLossForSegmentDetails">
        <link:definition>99940206 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Net Income (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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsNonCurrentAssetsByGeographicalAreaDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsNonCurrentAssetsByGeographicalAreaDetails">
        <link:definition>99940207 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements - 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/DisclosureEquityMethodAndOtherInvestmentsSummaryOfFinancialInformationOfReogenDetails" id="DisclosureEquityMethodAndOtherInvestmentsSummaryOfFinancialInformationOfReogenDetails">
        <link:definition>99940303 - Disclosure - Equity Method and Other Investments - Summary of Financial Information of Reogen (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>99940602 - 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>99940603 - 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>99940604 - 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>99940605 - 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>99940701 - 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/DisclosureEarningsPerShareScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" id="DisclosureEarningsPerShareScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails">
        <link:definition>99940802 - Disclosure - Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share (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>99941001 - 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/DisclosureRelatedPartyTransactionsRevenueRecognitionDetails" id="DisclosureRelatedPartyTransactionsRevenueRecognitionDetails">
        <link:definition>99941002 - 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/DisclosureRelatedPartyTransactionsRelationshipWithHologenDetails" id="DisclosureRelatedPartyTransactionsRelationshipWithHologenDetails">
        <link:definition>99941003 - Disclosure - Related-Party Transactions - Relationship with Hologen (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/DisclosureRelatedPartyTransactionsRelationshipWithHologenDefaultDetails" id="DisclosureRelatedPartyTransactionsRelationshipWithHologenDefaultDetails">
        <link:definition>41003 - Disclosure - Related-Party Transactions - Relationship with Hologen Default (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/DisclosureRelatedPartyTransactionsDeferredRevenueDetails" id="DisclosureRelatedPartyTransactionsDeferredRevenueDetails">
        <link:definition>99941004 - Disclosure - Related-Party Transactions - Deferred revenue (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>99941005 - 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/DisclosureLeasesDetails" id="DisclosureLeasesDetails">
        <link:definition>99941101 - Disclosure - 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/DisclosureDebtFinancingNotesPurchaseAgreementDetails" id="DisclosureDebtFinancingNotesPurchaseAgreementDetails">
        <link:definition>99941201 - Disclosure - Debt Financing - Notes Purchase 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/DisclosureDebtFinancingRoyaltyNotePurchaseAgreementDetails" id="DisclosureDebtFinancingRoyaltyNotePurchaseAgreementDetails">
        <link:definition>99941202 - Disclosure - Debt Financing - Royalty Note Purchase 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/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/StatementCondensedConsolidatedBalanceSheetsParenthetical" id="StatementCondensedConsolidatedBalanceSheetsParenthetical">
        <link:definition>995200105 - Statement - CONDENSED 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/DisclosureOrganizationAndBasisOfPresentation" id="DisclosureOrganizationAndBasisOfPresentation">
        <link:definition>995210101 - Disclosure - Organization and Basis of Presentation</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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncements" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncements">
        <link:definition>995210201 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements</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/DisclosureAccruedExpenses" id="DisclosureAccruedExpenses">
        <link:definition>995210401 - 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/DisclosureFinancialInstruments" id="DisclosureFinancialInstruments">
        <link:definition>995210501 - Disclosure - Financial Instruments</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>995210601 - 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>995210701 - 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/DisclosureEarningsPerShare" id="DisclosureEarningsPerShare">
        <link:definition>995210801 - Disclosure - Earnings Per Share</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>995210901 - 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>995211001 - 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>995211101 - 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>995211201 - 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>995211301 - 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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsPolicies">
        <link:definition>99920202 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements (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/DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsTables" id="DisclosureSummaryOfSignificantAccountingPoliciesAndRecentAccountingPronouncementsTables">
        <link:definition>99930203 - Disclosure - Summary of Significant Accounting Policies and Recent Accounting Pronouncements (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/DisclosureAccruedExpensesTables" id="DisclosureAccruedExpensesTables">
        <link:definition>99930403 - 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/DisclosureFinancialInstrumentsTables" id="DisclosureFinancialInstrumentsTables">
        <link:definition>99930503 - Disclosure - Financial Instruments (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/DisclosureEarningsPerShareTables" id="DisclosureEarningsPerShareTables">
        <link:definition>99930803 - Disclosure - Earnings Per Share (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>99931103 - 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/DisclosureFinancialInstrumentsDetails" id="DisclosureFinancialInstrumentsDetails">
        <link:definition>99940501 - Disclosure - Financial Instruments (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>99940601 - 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/DisclosureLeasesScheduleOfConsolidatedBalanceSheetsForLeasesDetails" id="DisclosureLeasesScheduleOfConsolidatedBalanceSheetsForLeasesDetails">
        <link:definition>99941103 - 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>99941104 - 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:roleType roleURI="http://meiragtx.com/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>99941301 - 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: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-20260630_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-20260630_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-20260630_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-20260630_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:element name="ContingentForwardInstrumentAssetLiabilityFairValueDisclosure" id="mgtx_ContingentForwardInstrumentAssetLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EquitySecuritiesAcquiredThroughStrategicCollaboration" id="mgtx_EquitySecuritiesAcquiredThroughStrategicCollaboration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ReogenLimitedMember" id="mgtx_ReogenLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UpfrontPaymentReceivable" id="mgtx_UpfrontPaymentReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ExpectedOwnershipPercentageHeldPostCollaborationAgreementFunding" id="mgtx_ExpectedOwnershipPercentageHeldPostCollaborationAgreementFunding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentEarlyRedemptionFee" id="mgtx_DebtInstrumentEarlyRedemptionFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SeniorSecuredRoyaltyNotesMember" id="mgtx_SeniorSecuredRoyaltyNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentFundingCommitmentAmount" id="mgtx_DebtInstrumentFundingCommitmentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SecondPurchaseUnderRoyaltyNotePurchaseAgreementMember" id="mgtx_SecondPurchaseUnderRoyaltyNotePurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ThirdPurchaseUnderRoyaltyNotePurchaseAgreementMember" id="mgtx_ThirdPurchaseUnderRoyaltyNotePurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UponApprovalOfU.s.FoodAndDrugAdministrationOrEuropeanMedicinesAgencyForBotaVecMember" id="mgtx_UponApprovalOfU.s.FoodAndDrugAdministrationOrEuropeanMedicinesAgencyForBotaVecMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UponApprovalOfU.s.FoodAndDrugAdministrationForAavHaqp1Member" id="mgtx_UponApprovalOfU.s.FoodAndDrugAdministrationForAavHaqp1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdditionalOptionalFinancingBeforeDecember312028Member" id="mgtx_AdditionalOptionalFinancingBeforeDecember312028Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RoyaltyPercentageOnGlobalNetSales" id="mgtx_RoyaltyPercentageOnGlobalNetSales" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="RoyaltyPercentageAdjustmentFundingThresholdAmount" id="mgtx_RoyaltyPercentageAdjustmentFundingThresholdAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TotalFundedAmountRecoveryPercentage" id="mgtx_TotalFundedAmountRecoveryPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="VolumeWeightedAveragePriceMeasurementPeriod" id="mgtx_VolumeWeightedAveragePriceMeasurementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MaximumAggregateRightAndOfferingParticipationAmount" id="mgtx_MaximumAggregateRightAndOfferingParticipationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NoncashRevenueReceived" id="mgtx_NoncashRevenueReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <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="AccruedConsultingExpenses" id="mgtx_AccruedConsultingExpenses" 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="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="NetProceedsFromIssuanceOfCommonStock" id="mgtx_NetProceedsFromIssuanceOfCommonStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" 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 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_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_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_VisiogeneLlcMember" name="VisiogeneLlcMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <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="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="OtherEquityMethodInvestmentsMember" id="mgtx_OtherEquityMethodInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <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="IncreaseDecreaseInAcquiredInProcessResearchAndDevelopmentAssets" id="mgtx_IncreaseDecreaseInAcquiredInProcessResearchAndDevelopmentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <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="AssetPurchaseAgreementMember" id="mgtx_AssetPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <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="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="PeriodOfJobVacancyBeforeGrantFundingBecomesRepayable" id="mgtx_PeriodOfJobVacancyBeforeGrantFundingBecomesRepayable" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <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="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="SecuritiesPurchaseAgreementMember" id="mgtx_SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <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="IssuanceCostsInConnectionWithPrivatePlacementOffering" id="mgtx_IssuanceCostsInConnectionWithPrivatePlacementOffering" 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="SalesAgreementMember" id="mgtx_SalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <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="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="GainOnTerminationOfLeaseLiabilities" id="mgtx_GainOnTerminationOfLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="Rule10b51ArrangementModifiedFlag" id="mgtx_Rule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NonRule10b51ArrangementModifiedFlag" id="mgtx_NonRule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" 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="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="StuartNaylorMember" id="mgtx_StuartNaylorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareRepurchaseAgreementWithPerceptiveLifeSciencesMasterFundLtdMember" id="mgtx_ShareRepurchaseAgreementWithPerceptiveLifeSciencesMasterFundLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentPrincipalAmountAmountToRedeem" id="mgtx_DebtInstrumentPrincipalAmountAmountToRedeem" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInLeaseLiabilities" id="mgtx_IncreaseDecreaseInLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchDevelopmentAndOtherAssetsMember" id="mgtx_ResearchDevelopmentAndOtherAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PublicOfferingMember" id="mgtx_PublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MeiragtxNeuroUkLimitedMember" id="mgtx_MeiragtxNeuroUkLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfLateStageClinicalPrograms" id="mgtx_NumberOfLateStageClinicalPrograms" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfGmpLicensedManufacturingFacilities" id="mgtx_NumberOfGmpLicensedManufacturingFacilities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MinimumDevelopmentPeriodOfProprietaryManufacturingPlatform" id="mgtx_MinimumDevelopmentPeriodOfProprietaryManufacturingPlatform" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MinimumNumberOfDistinctViralVectorsUtilized" id="mgtx_MinimumNumberOfDistinctViralVectorsUtilized" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MaximumOwnershipPercentageMayHoldIfOptionIsExercised" id="mgtx_MaximumOwnershipPercentageMayHoldIfOptionIsExercised" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MeiragtxManufacturingLimitedMember" id="mgtx_MeiragtxManufacturingLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SalesThresholdRequiredToTriggerContingentConsiderationPayment" id="mgtx_SalesThresholdRequiredToTriggerContingentConsiderationPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MilestonePaymentToBeReceived" id="mgtx_MilestonePaymentToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AgreementSellOrTransferOfSharesNoticePeriod" id="mgtx_AgreementSellOrTransferOfSharesNoticePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedLiabilitiesExcludingIncomeTaxesCurrent" id="mgtx_AccruedLiabilitiesExcludingIncomeTaxesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RelatedPartyLicenseRevenueMember" id="mgtx_RelatedPartyLicenseRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" id="mgtx_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EquityOptionLiabilityCurrent" id="mgtx_EquityOptionLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInUnbilledReceivableRelatedParties" id="mgtx_IncreaseDecreaseInUnbilledReceivableRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInContractWithCustomerLiabilityRelatedParties" id="mgtx_IncreaseDecreaseInContractWithCustomerLiabilityRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncrementalCommonSharesAttributableToDilutiveEffectOfStockOptions" id="mgtx_IncrementalCommonSharesAttributableToDilutiveEffectOfStockOptions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncrementalCommonSharesAttributableToDilutiveRestrictedStockUnits" id="mgtx_IncrementalCommonSharesAttributableToDilutiveRestrictedStockUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction" id="mgtx_IssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AssetAcquisitionConsiderationTransferredAccountsReceivable" id="mgtx_AssetAcquisitionConsiderationTransferredAccountsReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ServiceRevenueBasedOnCumulativeProgress" id="mgtx_ServiceRevenueBasedOnCumulativeProgress" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProceedsFromIssuanceOfDebtAndCommonStock" id="mgtx_ProceedsFromIssuanceOfDebtAndCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EquitySecuritiesWithoutReadilyDeterminableFairValueAmountCostBasis" id="mgtx_EquitySecuritiesWithoutReadilyDeterminableFairValueAmountCostBasis" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LongTermInvestmentsCostBasis" id="mgtx_LongTermInvestmentsCostBasis" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="HologenCollaborationAgreementMember" id="mgtx_HologenCollaborationAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueRecognizedInvoicedAmount" id="mgtx_RevenueRecognizedInvoicedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ContractWithCustomerLiabilityInitialRecognition" id="mgtx_ContractWithCustomerLiabilityInitialRecognition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueRecognizedFromCurrentPeriodIncreaseInContractLiability" id="mgtx_RevenueRecognizedFromCurrentPeriodIncreaseInContractLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NonControllingInterestPolicyPolicyTextBlock" id="mgtx_NonControllingInterestPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EquityOptionLiabilityFairValueDisclosure" id="mgtx_EquityOptionLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EquityOptionLiabilityMeasurementInput" id="mgtx_EquityOptionLiabilityMeasurementInput" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="SingleReportableSegmentMember" id="mgtx_SingleReportableSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContingentForwardAssetLiabilityMeasurementInput" id="mgtx_ContingentForwardAssetLiabilityMeasurementInput" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="FinancialInstrumentsAbstract" id="mgtx_FinancialInstrumentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfFinancialInstrumentsTableTextBlock" id="mgtx_ScheduleOfFinancialInstrumentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ContingentForwardInstrumentAssetLiability" id="mgtx_ContingentForwardInstrumentAssetLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ComprehensiveIncomeLossNetOfTaxOther" id="mgtx_ComprehensiveIncomeLossNetOfTaxOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
</xsd:schema>
