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C3b inactivator deficiency with immune complex manifestations
Clinical and Experimental Immunology
|January 1, 1982
Summary
A complete C3b inactivator deficiency was identified in a patient with bronchiectasis and recurrent pneumonia. This deficiency also led to immune complex manifestations, with an autosomal dominant transmission observed in the parents.
Area of Science:
- Immunology
- Genetics
Background:
- Complement system's role in immune response.
- C3b inactivator's function in regulating complement activation.
Observation:
- A 28-year-old patient presented with bronchiectasis and recurrent pneumonia.
- The patient exhibited immune complex manifestations including rheumatoid factor, circulating immune complexes, and serum sickness.
Findings:
- Complete deficiency of C3b inactivator identified.
- Autosomal dominant transmission pattern observed in the patient's parents.
Implications:
- C3b inactivator deficiency impacts complement activation, chemotaxis, opsonization, and immune complex clearance.
- Understanding this deficiency aids in managing recurrent infections and immune complex diseases.