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[Immunologic follow-up of HIV-positive patients. C3, C4 complement components during HIV infection]
V Skokanová1, J Kamínková, Z Vacek
1Oddĕlení lékarské imunologie KHS, Praha, CSc.
Insights
HIV infection significantly alters complement system proteins C3 and C4. Many patients exhibit hypercomplementaemia, differing from typical hypocomplementaemia, indicating immune dysregulation in HIV patients.
Area of Science:
- Immunology
- Virology
- Biochemistry
Context:
- Human Immunodeficiency Virus (HIV) infection is known to impact the immune system.
- Complement system proteins, specifically C3 and C4, play crucial roles in immune responses.
- Previous research suggests complement system dysregulation in various infections.
Purpose:
- To investigate the levels of complement components C3 and C4 in patients with HIV infection.
- To compare these levels with those found in a control group.
- To identify potential alterations in complement activity associated with HIV.
Summary:
- Investigations on 61 HIV-infected patients revealed significant deviations in C3 and C4 complement component levels.
- Only 37.7% of patients had C3 levels comparable to controls, and 39.3% had similar C4 levels.
- The study observed a striking hypercomplementaemia for both C3 and C4 components in the HIV-infected group, contrasting with expected hypocomplementaemia.
Impact:
- Findings highlight significant immune dysregulation in HIV infection related to the complement system.
- Suggests potential diagnostic or prognostic value of monitoring C3 and C4 levels in HIV patients.
- Opens avenues for further research into complement system's role in HIV pathogenesis and therapeutic strategies.
Abstract:
Investigations of the authors' patients with HIV infection revealed marked changes in the C3 and C4 components of complement. Of 61 investigated patients with HIV infection only 23 patients (37.7%) had values of the C3 component at the level recorded in controls. Values of the C4 component comparable with the control group were recorded in 24 patients (39.3%). From figures 1 and 2 it apparent that in the investigated group there is a striking hypercomplementaemia of both components, as compared with hypocomplementaemia.