Abstract
The objective of this study was to investigate the antiretroviral activity of specific inhibitors of glycosidases and mannosidases that are involved in N-linked oligosaccharide processing of glycoproteins. Castanospermine and 1-deoxynojirimycin, potent inhibitors of glucosidases I and II, showed significant activity against Moloney murine leukemia virus (IC 50: 1.2 μg/ml). Deoxymannojirimycin and swainsonine, inhibitors of mannosidase I and II, respectively, did not show any activity. These observations suggest that removal of the outermost glucose residue from high mannose asparagine-linked oligosaccharide may be essential for the replication of mouse leukemia virus. The relative nontoxic nature of these inhibitors and a novel mechanism of action suggest a potential for compounds of this type as chemopreventive and therapeutic agents in the treatment of acquired immune deficiency syndrome (AIDS).
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