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학술저널
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대한바이러스학회 JOURNAL OF BACTERIOLOGY AND VIROLOGY 大韓바이러스學會誌 제22권 제2호
발행연도
1992.12
수록면
227 - 233 (7page)

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To delineate the stage of the virus replicative cycle at which antivirals may interact, were performed the measurement of one step growth and viral DNA synthesis curves of HSV-1 strain F and time of addition experiments with 4 antivirals, DS 5000, ACV, Ara-T and FIAC. During one step growth curves maturated viruses appeared in the virus-infected Vero cells after 5h post infection(PI) and reached the highest titer 15h PI. The released viruses started appearing from llh PI and increased until 22h PI. Viral DNA synthesis which was surveyed by radioactivity of incorporated nucleic acid precursors-(H)-thymidine-significantly increased from 7h PI and reached the maximum 15h PI. Time of addition experiment followed by virus yield assay was performed. Virus-in- fected cells were treated at a concentration that was approximately 50-100-fold higher than their EC values. DS 5000, which interferes with virus binding or/and fusion, was no longer able to inhibit virus replication, if added 1h(or later) PI, I.e. after adsorption. ACV, Ara T and FIAC which inhibit viral DNA synthesis were no longer able to inhibit virus replication, if added 1 1h(or later) PI. Time of addition experiment using CPE inhibition assay method to read the results was also performed. The relationship of the increasement of EC of the tested compounds and delayed drug-addition time was very similar to that of the previous experiment. Those results were correlated with one step growth and viral DNA synthesis curves of the virus. It tells us that by controlling the drug addition time(ex, 0, 1, 5, 8, 11 and 15h PI) the stage of virus replicative cycle at which antivirals may interact may be rapidly suggested.

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