CHARMD

Comprehensive Herpesviruses Antiviral drug Resistance Mutation Database


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    T503A

    Antiviral assays:

    Antiviral EC50 ratio Phenotype Strain Source Marker Assay Reference
    Ganciclovir 3.10 Intermediate level resistance Recombinant Details Drug Resistance Assessed in a Phase 3 Clinical Trial of Maribavir Therapy for Refractory or Resistant Cytomegalovirus Infection in Transplant Recipients. (Feb 2024)
    Cidofovir 3.70 Intermediate level resistance Recombinant Details Drug Resistance Assessed in a Phase 3 Clinical Trial of Maribavir Therapy for Refractory or Resistant Cytomegalovirus Infection in Transplant Recipients. (Feb 2024)
    Foscarnet 1.50 No resistance Recombinant Details Drug Resistance Assessed in a Phase 3 Clinical Trial of Maribavir Therapy for Refractory or Resistant Cytomegalovirus Infection in Transplant Recipients. (Feb 2024)

    Mutations at the same locus:

    Mutant Resistances
    T503I Ganciclovir: Low level resistance
    T503I Cidofovir: High level resistance
    T503I Foscarnet: No resistance


    Tilloy et al., 2024
    Interdeposit Digital Number: IDDN.FR.001.420004.000.S.X.2024.000.31230