Apoptosis occurs predominantly in bystander cells and not in productively infected cells of HIV- and SIV-infected lymph nodes.

Abstract

Although 13 years have passed since identification of human immunodeficiency virus-1 (HIV-1) as the cause of AIDS, we do not yet know how HIV kills its primary target, the T cell that carries the CD4 antigen. We and others have shown an increase in the percentage of apoptotic cells among circulating CD4+ (and CD8+) T cells of HIV-seropositive individuals and an increase in frequency of apoptosis with disease progression. However, it is not known if this apoptosis occurs in infected or uninfected T cells. We show here, using in situ labelling of lymph nodes from HIV-infected children and SIV-infected macaques, that apoptosis occurs predominantly in bystander cells and not in the productively infected cells themselves. These data have implications for pathogenesis and therapy, namely, arguing that rational drug therapy may involve combination agents targeting viral replication in infected cells and apoptosis of uninfected cells.

• Authors: T H Finkel, G Tudor-Williams, N K Banda, M F Cotton, T Curiel, C Monks, T W Baba, R M Ruprecht, A Kupfer
• Journal: Nature medicine (Nat Med) Vol. 1 Issue 2 Pg. 129-34 (Feb 1995) ISSN: 1078-8956 [Print] United States
• PMID: 7585008 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)

Chemical References

• RNA, Messenger
• RNA, Viral

Topics

• Animals
• Apoptosis
• Child
• Child, Preschool
• Female
• HIV Infections (pathology, virology)
• HIV-1 (pathogenicity)
• Humans
• Lymph Nodes (pathology, virology)
• Macaca
• Male
• RNA, Messenger (analysis)
• RNA, Viral (analysis)
• Simian Acquired Immunodeficiency Syndrome (pathology, virology)
• Simian Immunodeficiency Virus (pathogenicity)
• T-Lymphocytes (virology)