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. 1989 Dec;63(12):5364–5370. doi: 10.1128/jvi.63.12.5364-5370.1989

Attenuation and cell culture adaptation of hepatitis A virus (HAV): a genetic analysis with HAV cDNA.

J I Cohen 1, B Rosenblum 1, S M Feinstone 1, J Ticehurst 1, R H Purcell 1
PMCID: PMC251203  PMID: 2555561

Abstract

RNA transcripts of hepatitis A virus (HAV) HM-175 cDNA from attenuated, cell culture-adapted HAV were infectious in cell culture. A full-length HAV cDNA from wild-type HAV (propagated in marmosets in vivo) was constructed. Chimeric cDNAs that contained portions of both wild-type and attenuated genomes were produced. Oligonucleotide-directed mutagenesis was used to engineer a point mutation into the VP1 gene of attenuated HAV cDNA, so that the sequence of this capsid protein would be identical to that of the wild-type virus. Transfection of monkey kidney cells with RNA transcripts from several of the chimeric cDNAs and from the mutagenized cDNA induced production of HAV. Comparison of the growth of attenuated, wild-type, chimeric, and mutant viruses in vitro indicated that the P2-P3 (nonstructural protein) region is important for cell culture adaptation of the virus; the 5' noncoding region may also contribute to adaptation, but to a lesser extent. Inoculation of marmosets with transfection-derived virus also suggested that the P2-P3 region plays an important role in attenuation of HAV HM-175.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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