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. 1993 Apr;67(4):1953–1958. doi: 10.1128/jvi.67.4.1953-1958.1993

Equilibrium centrifugation studies of hepatitis C virus: evidence for circulating immune complexes.

M Hijikata 1, Y K Shimizu 1, H Kato 1, A Iwamoto 1, J W Shih 1, H J Alter 1, R H Purcell 1, H Yoshikura 1
PMCID: PMC240263  PMID: 8383220

Abstract

The buoyant density of hepatitis C virus (HCV), with high in vivo infectivity (strain H) or low in vivo infectivity (strain F), was determined by sucrose gradient equilibrium centrifugation. Viral RNA of strain H was detected in fractions with densities of < or = 1.09 g/ml (principally approximately 1.06 g/ml), while that of strain F was found in fractions with densities of approximately 1.06 and approximately 1.17 g/ml. The observed difference was confirmed by differential flotation centrifugation; in NaCl solution with a density of 1.063 g/ml, most of the HCV RNA of strain H was detected in the top fraction, while that of strain F appeared in the bottom. The same relationship between buoyant density and infectivity was observed in flotation centrifugation experiments with other HCV strains. In immunoprecipitation experiments with anti-human immunoglobulin, HCV (as measured by HCV RNA) was precipitated from the samples with low infectivity and high density but not from those with high infectivity and low density. Examination of serial sera from a chimpanzee infected with HCV revealed parallel changes in the buoyant density and immunoprecipitability of HCV-associated RNA during the course of infection. These data suggest that HCV is bound to anti-HCV antibodies as antigen-antibody complexes in chronic hepatitis C.

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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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