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Abnormalities of the intestinal immune system in AIDS
1University of California, San Diego.
Gastroenterology Clinics of North America
|September 1, 1988
Summary
Abnormalities in gut immune cells, particularly CD4 helper T-cells, are seen in HIV/AIDS patients. This immune deficiency increases susceptibility to infections entering through the intestinal tract.
Area of Science:
- Immunology
- Virology
- Gastroenterology
Background:
- Abnormalities in lymphocyte subset distribution are observed in the intestinal mucosa of patients with AIDS-related conditions (ARC) and Acquired Immunodeficiency Syndrome (AIDS).
- These changes are most pronounced in the CD4 helper-inducer T-cell subset, suggesting a direct impact of Human Immunodeficiency Virus (HIV) infection.
Purpose of the Study:
- To investigate the implications of CD4-positive T-cell deficiency in the intestinal mucosa of HIV-infected individuals.
- To understand how these mucosal immune alterations affect susceptibility to infections.
Main Methods:
- Analysis of lymphocyte subset distribution in the intestinal mucosa of ARC and AIDS patients.
- Correlation of CD4 T-cell levels with immune function and infection susceptibility.
Main Results:
- Significant abnormalities in lymphocyte subsets, especially CD4 T-cells, were found in the gut mucosa of ARC and AIDS patients.
- A deficiency in mucosal CD4 T-cells was linked to impaired cell-mediated immunity and secretory IgA production.
Conclusions:
- Deficiency in intestinal CD4 T-cells in HIV/AIDS patients compromises mucosal immunity.
- Altered mucosal defense mechanisms increase the risk of enteric and systemic infections in individuals with HIV/AIDS.