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Published on: August 15, 2025
Effects of mutations on herpes simplex virus 1 thymidine kinase functionality: an in vitro assay based on detection
Nicolas Malartre1, Roselyne Boulieu, Nisrine Falah
1Laboratoire de Virologie Est., Centre de Biologie et Pathologie Est., Hospices Civils de Lyon, Lyon, France.
Abstract:
Discrimination between the mutations responsible for drug resistance and those of UL23 TK gene polymorphism can be difficult. A non-isotopic method has been developed to assess TK functionality by measuring monophosphate forms of both acyclovir (ACV) and thymidine using HPLC/DAD. Phenotypes of TKs could thus be characterized as TK altered (P84L, A189V, L227F), TK deficient (G200S, L291P) or TK partial (R163H). A reliable link between HSV UL23 TK mutations and ACV resistance is necessary for developing a powerful genotyping tool to detect ACV resistance quickly in clinical samples.
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