Related Experiment Videos
AIDS: immunologic abnormalities following human immunodeficiency virus infection
1University of California, Los Angeles, School of Medicine.
Journal of Thoracic Imaging
|September 1, 1991
Summary
Human immunodeficiency virus (HIV) infection progressively destroys the immune system by targeting T lymphocytes and other immune cells. This leads to severe opportunistic infections and reduced survival in acquired immunodeficiency syndrome (AIDS) patients.
Area of Science:
- Immunology
- Virology
- Pathology
Background:
- Human immunodeficiency virus (HIV) selectively infects T4 helper/inducer lymphocytes, initiating a cascade of immune system abnormalities.
- The depletion of T4 cells critically impairs both cellular and humoral immune responses.
Purpose of the Study:
- To elucidate the ordered progression of immunologic abnormalities following HIV infection.
- To understand the role of various immune cells, including T lymphocytes, B lymphocytes, monocytes, macrophages, and natural killer cells, in the pathogenesis of HIV and acquired immunodeficiency syndrome (AIDS).
Main Methods:
- The study describes the observed immunologic changes in HIV-infected individuals.
- Analysis of T lymphocyte counts and function.
- Assessment of B lymphocyte activation and serologic response.
- Identification of factors in patient sera that suppress lymphocyte reactivity.
Main Results:
- HIV infection leads to a decrease in both the number and function of T lymphocytes.
- B lymphocytes exhibit polyclonal activation but fail to respond to new antigens.
- Monocytes and macrophages act as viral reservoirs and transport HIV to target organs.
- Reduced natural killer cell activity correlates with AIDS progression.
Conclusions:
- HIV infection causes progressive, systemic immune system dysfunction and destruction.
- This immune compromise results in severe opportunistic infections, neoplasms, and diminished survival in AIDS patients.
- The findings highlight the profound impact of HIV on the entire immune network.