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Expression and purification of E2/NS1 protein of hepatitis C virus and detection of anti-E2/NS1 antibodies in chronic liver disease patients

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Journal of Biomedical Science

Abstract

Glycoproteins on the surface of viral particles present the main target of neutralizing antibodies. The structural proteins of most Flaviviruses are known to elicit neutralizing antibodies and, thus, to help in both the natural resolution of the infection and the protection from challenge with homologous hepatitis C virus (HCV). Because such antigens are associated with the viral clearance in both humans and chimpanzees, we aimed to express the E2/NS1 protein of HCV and to study the role of anti-E2/NS1 antibodies in the natural resolution of HCV infection. The prevalence of anti-E2/NS1 antibodies to recombinant E2/NS1 protein was seen by Western blot in chronic liver disease patients (15 chronic hepatitis and 12 cirrhotic patients), who were positive for anti-HCV and negative for HBV infection. The study also included 2 negative controls (positive for HBV infection and negative for anti-HCV antibodies) and 2 healthy controls (negative for both HBV and HCV infection). Anti-E2/NS1 was present in 20% of the chronic hepatitis and 16% of the cirrhosis patients. None of the controls were positive for anti-E2/NS1 antibodies. Serum samples positive for anti-E2/NS1 antibodies were also positive for HCV RNA by RT/PCR. Accordingly, the presence of anti-E2/NS1 may have very little or no role in the natural resolution of HCV infection.

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Authors and Affiliations

  1. Department of Experimental Medicine and Biotechnology, Post Graduate Institute of Medical Education and Research, Chandigarh, India

    A. Chakraborti

  2. Department of Hepatology, Post Graduate Institute of Medical Education and Research, Chandigarh, India

    Y. Chawla

  3. Division of Infectious Diseases/Department of Internal Medicine, University of Texas Medical Branch, 77555-0435, Galveston, TX, USA

    J. Pandya

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Pandya, J., Chakraborti, A. & Chawla, Y. Expression and purification of E2/NS1 protein of hepatitis C virus and detection of anti-E2/NS1 antibodies in chronic liver disease patients. J Biomed Sci 10, 276–282 (2003). https://doi.org/10.1007/BF02256063

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  • DOI: https://doi.org/10.1007/BF02256063

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