The inhibitory co-receptors: a way to save from anergy the HIV-specific T cells

Curr HIV Res. 2009 May;7(3):266-72. doi: 10.2174/157016209788347949.

Abstract

The functional impairment of HIV-specific CD4(+) T cells during chronic HIV infection is thought to be closely linked to viral replication and to T cell exhaustion. T cell exhaustion in the presence of ongoing antigen exposure is a common feature of chronic viral infection, in which dysfunctional T cells fail to eliminate the virus. Otherwise, antiviral T cell function impairment is a poorly understood mechanism. Increasing evidences show that HIV-specific T lymphocytes up-regulated inducible co-receptors, such as the Cytoxic T Lymphocyte Antigen-4, (CTLA-4, or CD152) and Programmed Death-1 (PD-1) and that blockade of the CD152 or PD-1 pathway restores HIV-specific CD4(+) T cell function in HIV infection. This review will focus on finding a possible role for inhibitory receptors on virus-specific CD4(+) T cells. The analysis of the role of CD152 and PD-1 in HIV-1 infection could provide important insight into the mechanism of viral induced immune dysfunction and lead to immunotherapeutic strategies to reverse immune suppression in this pathology.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Antigens, CD / immunology
  • Apoptosis Regulatory Proteins / immunology
  • CD4-Positive T-Lymphocytes / immunology*
  • CD4-Positive T-Lymphocytes / virology*
  • CTLA-4 Antigen
  • HIV Infections / immunology*
  • HIV Infections / virology
  • HIV-1 / immunology*
  • Humans
  • Programmed Cell Death 1 Receptor

Substances

  • Antigens, CD
  • Apoptosis Regulatory Proteins
  • CTLA-4 Antigen
  • CTLA4 protein, human
  • PDCD1 protein, human
  • Programmed Cell Death 1 Receptor