Related Experiment Video
Updated: May 3, 2026

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
Published on: July 16, 2012
CD81 and hepatitis C virus (HCV) infection
Lucie Fénéant1, Shoshana Levy2, Laurence Cocquerel3
1Center for Infection and Immunity of Lille, CNRS-UMR8204, Inserm-U1019, Institut Pasteur de Lille, Université Lille Nord de France, Institut de Biologie de Lille, 1 rue du Pr Calmette, CS50447, 59021 Lille Cedex, France. lucie.feneant@ibl.fr.
Hepatitis C Virus (HCV) infection impacts millions globally. This review details the role of the CD81 protein in HCV entry into liver cells and the subsequent immune response.
Area of Science:
- Virology
- Immunology
- Hepatology
Background:
- Hepatitis C Virus (HCV) poses a significant global health challenge, infecting over 160 million people.
- HCV infection can lead to severe liver conditions, including chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma.
- HCV is an enveloped RNA virus that primarily infects hepatocytes through a complex, multi-step cellular entry process.
Purpose of the Study:
- To review the current understanding of CD81's role in the Hepatitis C Virus lifecycle.
- To explore the involvement of CD81 in the immune response to HCV infection.
Main Methods:
- Literature review of studies on Hepatitis C Virus entry factors.
- Analysis of research on the function of tetraspanin CD81 in viral infections.
- Examination of immunological studies related to HCV and CD81.
Main Results:
- CD81 is a well-characterized and crucial factor for HCV entry into liver cells.
- HCV entry involves a complex interplay of specific cellular factors, including CD81, at the plasma membrane.
- CD81 plays a significant role in mediating the initial stages of HCV infection.
Conclusions:
- CD81 is a key determinant in the Hepatitis C Virus lifecycle, particularly in viral entry.
- Understanding CD81's function is vital for developing strategies against HCV infection and modulating the immune response.
Related Concept Videos
Hepatitis
Viral Hepatitis I: Introduction
Cytomegalovirus Disease
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

