Journal
SCIENCE
Volume 290, Issue 5498, Pages 1972-1974Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.290.5498.1972
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Funding
- NCI NIH HHS [CA57973] Funding Source: Medline
- NIAID NIH HHS [AI40034] Funding Source: Medline
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Hepatitis C virus (HCV) infection is a global health problem affecting an estimated 170 million individuals worldwide. We report the identification of multiple independent adaptive mutations that cluster in the HCV nonstructural protein NS5A and confer increased replicative ability in vitro. Among these adaptive mutations were a single amino acid substitution that allowed HCV RNA replication in 10% of transfected hepatoma cells and a deletion of 47 amino acids encompassing the interferon (IFN) sensitivity determining region (ISDR). Independent of the ISDR, IFN-alpha rapidly inhibited HCV RNA replication in vitro. This work establishes a robust, cell-based system for genetic and functional analyses of HCV replication.
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