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Molekulyarnaya Biologiya

[Affect of deoxynojirimycin derivatives on hepatitis C virus morphogenesis].

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A V Timokhova
L V Bakinovskiĭ
A I Zinin
V I Popenko
A V Ivanov
P M Rubtsov
S N Kochetkov
S N Belzhelarskaia

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요약

Viral hepatitis C is one of the wide-spread and dangerous human diseases. The choice of drugs for treatment of chronic hepatitis C virus (HCV) infection is limited and prophylactic vaccines do not exist. Thus, the development of new antiviral strategies and substances are of great importance. The targeting of viral morphogenesis might be used as an alternative approach to existing strategies of HCV blocking. The glycosylation of viral envelope proteins is an important step of viral particle morphogenesis that determines the correct assembly of HCV virions. The derivatives of glucose analog deoxynojirimycin (DNJ)--inhibitors of alpha-glucosidase can impair the assembly of structural proteins and HCV particle formation. In the present work the affect of alkylated derivatives of DNJ N-pentyl-DNJ and N-benzyl-DNJ to HCVmorphogenesis in a model system insect cells producing three viral structural proteins with formation of virus-like particles was studied. Intracellular N-glycosylation of HCV envelope glycoproteins was shown to be impaired by DNJ derivatives. At 1 mM concentrations of these substances the level of gpE1 and gpE2 glycoproteins increase and their electrophoretic mobility decrease which seems to be due to inhibition of a-glucosidase in endoplasmic reticulum and accumulation of hyperglycosylated N-glycans in HCV glycoproteins. The interaction of the latters with calnexin leads to formation of unproductive dimers and bloks productive assembly of virus-like particles.

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