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© Research
Publication : The Journal of general virology

Restriction of poliovirus RNA replication in persistently infected nerve cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of general virology - 01 May 2002

Girard S, Gosselin AS, Pelletier I, Colbère-Garapin F, Couderc T, Blondel B

Link to Pubmed [PMID] – 11961263

J. Gen. Virol. 2002 May;83(Pt 5):1087-93

The aetiology of post-polio syndrome may involve persistence of poliovirus (PV) in the CNS. PV persists in the CNS of infected paralysed mice for over a year after the acute phase of paralytic poliomyelitis. However, infectious PV particles cannot be recovered from homogenates of CNS from paralysed mice after the acute phase of disease, indicating that PV replication is restricted. To identify the molecular mechanism by which PV replication is limited, PV RNA synthesis was analysed by estimating the relative level of genomic (plus-strand) and complementary (minus-strand) PV RNA in the CNS of persistently infected mice. PV RNA replication decreased during the 6 months following onset of paralysis, due mainly to inhibition of plus-strand RNA synthesis. Thus, restriction of PV RNA synthesis may contribute to persistence by limiting virus replication in the mouse CNS. Interestingly, viral RNA replication was similarly inhibited in neuroblastoma IMR-32 cell cultures persistently infected with PV. This in vitro model thus shows that cellular factors play a role in the inhibition of viral RNA synthesis.

http://www.ncbi.nlm.nih.gov/pubmed/11961263