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Small-bowel involvement in systemic lupus erythematosus: a morphometric and immunohistochemical study
C C Elia1, A J Carneiro, H S De Souza
1Dept of Internal Medicine, University Hospital, Federal University of Rio de Janeiro, Brazil.
Scandinavian Journal of Gastroenterology
|October 16, 1999
Summary
Systemic lupus erythematosus (SLE) patients show decreased CD4+ T-cells and other immune cells in the intestinal lining. These intestinal immune cell abnormalities may indicate broader immune system defects in SLE.
Area of Science:
- Immunology
- Gastroenterology
- Rheumatology
Background:
- Investigated intestinal mononuclear cell subpopulations in systemic lupus erythematosus (SLE).
- Correlated these subpopulations with disease activity in SLE patients.
Purpose of the Study:
- To analyze the composition of intestinal immune cells in SLE patients.
- To determine if these immune cell differences relate to SLE disease activity.
Main Methods:
- Studied 18 female SLE outpatients (10 active, 8 remission) and 10 healthy controls.
- Performed peroral jejunal biopsies for histologic and immunohistochemical analysis.
- Used monoclonal antibodies (CD3, CD4, CD8, D1, D7, D9, M1) to evaluate cell populations.
Main Results:
- Decreased CD4+ T-cells observed in all SLE patients, particularly those in remission.
- Reduced D1+ and D9+ cells found in all SLE patients compared to controls.
- No significant difference in CD3+, CD8+, D7+, and M1+ cells between SLE patients and controls.
Conclusions:
- Quantitative abnormalities in intestinal mucosal cell-mediated immunity were identified in SLE.
- These findings suggest potential systemic immune system defects in patients with SLE.