In Vitro Evaluation of the Activities of the Novel Anticytomegalovirus Compound AIC246 (Letermovir) against Herpesviruses and Other Human Pathogenic Viruses

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Abstract
AIC246 (letermovir) is a potent anticytomegalovirus drug in clinical development. Here, we report a consistent antiviral efficacy of AIC246 against human cytomegalovirus laboratory strains, clinical isolates, and virus variants resistant to approved drugs. Furthermore, we describe a remarkable selectivity of AIC246 for human cytomegaloviruses compared to that of other alpha-, beta-, or gammaherpesviruses or nonrelated pathogenic viruses, including adeno-, hepadna-, retro-, orthomyxo-, and flaviviruses. Our data confirm and support an excellent and selective anticytomegaloviral activity of AIC246.