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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Demonstration of viral thymidine kinase inhibitor and its effect on deoxynucleotide metabolism in cells infected with herpes simplex virus.

The thymidine analog 5'-ethynylthymidine was a potent inhibitor of herpes simplex virus type 1 (strain KOS)-induced thymidine kinase with a Ki value of 0.09 microM. 5'-Ethynylthymidine was less inhibitory against herpes simplex virus type 2 (strain 333)-induced thymidine kinase with a Ki of 0.38 microM and showed no inhibition against human cytosolic thymidine kinase under the conditions tested. The compound was effective against the altered thymidine kinase induced by acyclovir- and bromovinyldeoxyuridine-resistant virus variants. At 100 microM 5'-ethynylthymidine, the cellular pool size of dTTP in herpes simplex virus type 1-infected cells was 5% that of infected cells receiving no drug treatment, while there was no significant effect on the pool sizes of dATP, dGTP, and dCTP. There was a positive correlation between dTTP pools and the intracellular thymidine kinase activity of herpes simplex virus type 1-infected cells. When tested alone, 5'-ethynylthymidine exhibited no antiviral activity, but it antagonized the antiviral efficacy of five compounds which require viral thymidine kinase for their action.[1]

References

  1. Demonstration of viral thymidine kinase inhibitor and its effect on deoxynucleotide metabolism in cells infected with herpes simplex virus. Nutter, L.M., Grill, S.P., Dutschman, G.E., Sharma, R.A., Bobek, M., Cheng, Y.C. Antimicrob. Agents Chemother. (1987) [Pubmed]
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