Transgenic expression of full-length 2',5'-oligoadenylate synthetase 1b confers to BALB/c mice resistance against West Nile virus-induced encephalitis - PubMed (original) (raw)
. 2011 Aug 15;417(1):147-53.
doi: 10.1016/j.virol.2011.05.018. Epub 2011 Jun 17.
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- PMID: 21683973
- DOI: 10.1016/j.virol.2011.05.018
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Transgenic expression of full-length 2',5'-oligoadenylate synthetase 1b confers to BALB/c mice resistance against West Nile virus-induced encephalitis
Dominique Simon-Chazottes et al. Virology. 2011.
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Abstract
Susceptibility of inbred strains to infection with West Nile virus (WNV) has been genetically associated with an arginine-to-a nonsense codon substitution at position 253 (R253X) in the predicted sequence of the murine 2',5'-oligoadenylate synthetase 1B (OAS1B) protein. We introduced by transgenesis the Oas1b cDNA from MBT/Pas mice carrying the R253 codon (Oas1b(MBT)) into BALB/c mice homozygous for the X253 allele (Oas1b(BALB/c)). Overexpression of Oas1b(MBT) mRNA in the brain of transgenic mice prior and in the time course of infection provided protection against the neuroinvasive WNV strain IS-98-ST1. A 200-fold induction of Oas1b(MBT) mRNA in the brain of congenic BALB/c mice homozygous for a MBT/Pas segment encompassing the Oas1b gene was also efficient in reducing both viral growth and mortality, whereas a 200-fold induction of Oas1b(BALB/c) mRNA was unable to prevent virally-induced encephalitis, confirming the critical role of the R253X mutation on Oas1b activity in live mice.
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