Abstract
We have investigated the possible interaction of Japanese Kampo medicine; Shosaiko-to with Epstein-Barr virus (EBV) induction by TPA (12-O-tetra-decanoyl-phorbol-13-acetate) in EBV-genome harboring cells. The effect of ether extract of Shosaiko-to was also studied on the induction of EBV by superinfection with EBV from P3HR-1 cells (P3H-EBV). Concomitant treatment of EBV-latently-infected cells (Raji and A2L/AH) with TPA and ether extract resulted in effective inhibition of EBV-antigen induction. However, in the experiments to test the influence of ether extract on EBV induction by superinfecting Raji cells with P3H-EBV, ether extract did not affect the percentage of EBV-antigen-positive cells. These data indicate that Shosaiko-to is effective to inhibit antigen synthesis induced by chemical promoters without affecting EBV-antigen induction after superinfection.
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