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Leprosy: altered complement receptors in disseminated disease.
The Journal of Investigative Dermatology
|July 1, 1985
Summary
Patients with lepromatous leprosy have significantly fewer C3b receptors (CR1) on their erythrocytes. This reduction in complement receptor 1 may impair immune complex clearance in Hansen's disease.
Area of Science:
- Immunology
- Hematology
Background:
- Erythrocyte C3b receptor (CR1) plays a role in immune complex clearance.
- Hansen's disease (leprosy) is a chronic infectious disease affecting the immune system.
Purpose of the Study:
- To quantify C3b receptor (CR1) expression on erythrocytes in Hansen's disease patients.
- To investigate the correlation between CR1 levels and leprosy disease type.
Main Methods:
- Radioimmunoassay using a monoclonal antibody to measure total CR1 on erythrocytes.
- Comparison of CR1 levels in lepromatous leprosy, tuberculoid leprosy, and healthy controls.
Main Results:
- Lepromatous leprosy patients showed significantly reduced CR1 expression (mean 310 CR1/erythrocyte) compared to controls (mean 512 CR1/erythrocyte) and tuberculoid patients (mean 577 CR1/erythrocyte).
- Tuberculoid patients had CR1 levels comparable to normal controls.
Conclusions:
- Reduced erythrocyte CR1 in lepromatous leprosy suggests impaired immune complex clearance.
- This finding may contribute to the pathophysiology of lepromatous leprosy.