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Coinfection with hepatitis C virus increases lymphocyte apoptosis in HIV-infected patients

Marina Núñez1, Vincent Soriano, Mariola López

  • 1Department of Infectious Diseases, Hospital Carlos III, Madrid, Spain. mnunez@wfubmc.edu

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
|October 10, 2006
PubMed

Insights

Hepatitis C virus (HCV) significantly increases T cell apoptosis in patients with human immunodeficiency virus (HIV). This finding highlights HCV

Area of Science:

  • Immunology
  • Virology
  • Cell Biology

Background:

  • Human immunodeficiency virus (HIV) infection is known to cause CD4+ T cell depletion.
  • Hepatitis C virus (HCV) coinfection is common in HIV-infected individuals.
  • The specific role of HCV in exacerbating T cell loss during HIV coinfection requires further elucidation.

Purpose of the Study:

  • To investigate the impact of hepatitis C virus (HCV) on T cell apoptosis in patients coinfected with human immunodeficiency virus (HIV).
  • To compare T cell apoptosis rates between HIV-monoinfected and HIV-HCV-coinfected individuals not on antiretroviral therapy.

Main Methods:

  • Quantification of T cell apoptosis using annexin V labeling.
  • Analysis of apoptosis in naive CD4+ T cells and naive/memory CD8+ T cells.
  • Study population included 31 HIV-infected and 30 HIV-HCV-coinfected patients.

Main Results:

  • Significantly higher rates of T cell apoptosis were observed in HIV-HCV-coinfected patients compared to HIV-monoinfected patients.
  • Apoptosis was elevated in naive CD4+ T cells in the coinfected group.
  • Increased apoptosis was also noted in both naive and memory CD8+ T cells among coinfected individuals.

Conclusions:

  • Hepatitis C virus (HCV) plays a significant role in accelerating T cell apoptosis in the context of HIV coinfection.
  • The findings suggest that HCV exacerbates immune system damage, potentially worsening disease progression in coinfected individuals.
  • Understanding this interaction is crucial for managing HIV-HCV coinfection and developing targeted therapeutic strategies.

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