Related Experiment Videos
Evidence for IgA-specific B cell hyperactivity in patients with IgA nephropathy
Kidney International
|March 1, 1986
Summary
Patients with IgA nephropathy show elevated spontaneous immunoglobulin A (IgA) synthesis from peripheral blood mononuclear cells (PBMC). This increased IgA production by B cells correlates with serum IgA levels in these patients.
Area of Science:
- Immunology
- Nephrology
Background:
- IgA nephropathy (IgAN) is a common glomerular kidney disease.
- The pathogenesis of IgAN involves increased IgA production and deposition.
Purpose of the Study:
- To investigate in vitro immunoglobulin synthesis by peripheral blood mononuclear cells (PBMC) from IgAN patients.
- To determine if B cells from IgAN patients have an intrinsic defect in IgA production.
Main Methods:
- PBMC from IgAN patients and healthy controls were cultured to assess spontaneous and mitogen-stimulated IgA, IgG, and IgM synthesis.
- Pokeweed mitogen (PWM) and Concanavalin A (Con A) were used to stimulate and suppress immunoglobulin production.
- T and B cell subsets were isolated and co-cultured to evaluate cellular contributions to IgA synthesis.
Main Results:
- Spontaneous and PWM-stimulated IgA synthesis were significantly elevated in IgAN patients compared to controls.
- Concanavalin A-induced suppression of IgA synthesis was more pronounced in IgAN patients.
- Enriched B cells from IgAN patients showed a significantly increased capacity for IgA production, correlating with serum IgA levels.
Conclusions:
- Peripheral blood B cells from IgAN patients exhibit an intrinsic hyperactivity in IgA production.
- This enhanced IgA synthesis by B cells may contribute to the pathogenesis of IgA nephropathy.