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Preparation and Use of HIV-1 Infected Primary CD4+ T-Cells as Target Cells in Natural Killer Cell Cytotoxic Assays
Published on: March 14, 2011
HIV-1-related thrombocytopenia
1New York University Medical School, Department of Medicine, New York.
Hematology/Oncology Clinics of North America
|February 1, 1990
Summary
Human immunodeficiency virus type 1 (HIV-1) infection is linked to immunologic thrombocytopenia in at-risk groups. Immune complexes containing anti-HIV-1 antibodies may cause low platelet counts in these patients.
Area of Science:
- Immunology
- Virology
- Hematology
Background:
- Immunologic thrombocytopenia has been observed in patients with human immunodeficiency virus type 1 (HIV-1) infection.
- Affected patient groups include homosexuals, narcotic addicts, hemophiliacs, and heterosexual partners of HIV-1 infected individuals.
Purpose of the Study:
- To investigate the immunologic mechanisms underlying thrombocytopenia in HIV-1 seropositive patients.
- To identify potential immune complexes involved in the pathogenesis of low platelet counts.
Main Methods:
- Analysis of platelet-bound immunoglobulins (IgG) and complement components (C3C4).
- Detection of circulating immune complexes in patient serum.
- Characterization of immune complex composition, specifically looking for anti-HIV-1 antibody interactions.
Main Results:
- All HIV-1 seropositive patients with thrombocytopenia exhibited elevated levels of platelet-bound IgG and C3C4.
- Circulating immune complexes were detected in all affected patients.
- Immune complexes from homosexual and narcotic addict patients contained anti-F(ab') against anti-HIV-1 antibody.
Conclusions:
- Elevated platelet-bound IgG and C3C4, along with circulating immune complexes, are characteristic of thrombocytopenia in HIV-1 infection.
- The presence of anti-F(ab') against anti-HIV-1 antibody in immune complexes suggests a potential mechanism for HIV-1 associated thrombocytopenia.
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