Uncoating of a rimantadine-resistant variant of influenza virus in the presence of rimantadine - PubMed (original) (raw)
Uncoating of a rimantadine-resistant variant of influenza virus in the presence of rimantadine
A G Bukrinskaya et al. J Gen Virol. 1982 May.
Abstract
A rimantadine-resistant variant of the Texas strain of influenza virus (Tr) was obtained by serial passages in eggs in MDCK cells in the presence of the drug, and its uncoating in MDCK cells was compared to that of the sensitive variant (Ts). First and second steps of uncoating were defined respectively by the appearance of subviral particles (SVP) in nuclear-associated cytoplasm (NAC) and ribonucleoproteins (RNPs) in nucleoplasm. In cells infected with Ts, SVP and RNPs were revealed in NAC, while in the presence of rimantadine RNPs were neither found in NAC nor in the nucleoplasm. In cells infected with Tr, SVP but not RNPs were observed in NAC. The amount of RNPs in the nucleoplasm was almost unchanged in rimantadine-treated cells, demonstrating that rimantadine did not interfere with uncoating of the resistant variant. These findings confirm the suggestion that rimantadine blocks the second step of uncoating of sensitive influenza viruses, and are consistent with the idea that this event does account for the prevention of influenza virus infection by the drug.
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