Abstract
1-beta-D-arabinofuranosyl-E-5-(2-bromovinyl) uracil (BV-ara-U) and 1-beta-D-arabinofuranosyl-E-5-(2-chlorovinyl)uracil (CV-ara-U) were tested for their anti-herpesviral activity in virus rating method, a plaque reduction method, and a virus yield reduction method, using human embryonic lung fibroblast (HEL-F) cells, At a concentration as low as 0.1 microgram/ml, both drugs exerted a marked inhibitory effect on the development of cytopathogenic effect induced by herpes simplex virus type 1 (HSV-1) infection and on the multiplication and plaque formation of HSV-1. Neither BV-ara-U nor CV-ara-U was significantly active against HSV type 2 (HSV-2). They scarcely inhibited growth of HEL-F cells, mouse L, and murine leukemia cells. Compared with 1-beta-D-arabinofuranosylthymine and 5-iodo-deoxyuridine, BV-ara-U and CV-ara-U were more than 10 times as active against HSV-1 and much less active against HSV-2. BV-ara-U was as active as E-5-(2-bromovinyl)-2'-deoxyuridine against HSV-1 and less inhibitory to growth of HEL-F cells. Cellular deoxyribonucleic acid synthesis was not significantly influenced by the new derivatives of arabinosyluracil, even at a concentration as high as 300 microgram/ml. The derivatives showed extremely marked inhibition of deoxyribonucleic acid synthesis in HSV-1-infected cells, whereas their inhibitory effect on deoxyribonucleic acid synthesis in HSV-2-infected cells was much lower than that in HSV-1-infected cells. These findings indicate that BV-ara-U and CV-ara-U are selectively inhibitory to HSV-1 multiplication.
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Selected References
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