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Lymphopenia in rheumatoid arthritis.
D P Symmons1, M Farr, M Salmon
1Rheumatism Research Wing, Medical School, University of Birmingham.
Journal of the Royal Society of Medicine
|August 1, 1989
Summary
Persistent lymphopenia (low lymphocyte count) affects 15% of rheumatoid arthritis patients and is linked to more severe disease. This T-cell reduction, not B-cell reduction, occurs independently of disease activity or treatment.
Area of Science:
- Rheumatology
- Immunology
- Hematology
Background:
- Lymphopenia (low lymphocyte count) is an underrecognized characteristic of rheumatoid arthritis (RA).
- Understanding the prevalence and clinical significance of lymphopenia in RA is crucial for patient management.
Purpose of the Study:
- To determine the prevalence of lymphopenia in rheumatoid arthritis patients.
- To investigate the significance of lymphopenia, including its association with disease severity and impact on T-cell and B-cell subsets.
Main Methods:
- A longitudinal study of 66 rheumatoid arthritis patients over one year.
- Analysis of lymphocyte subsets, including T-cells (CD4+, CD8+) and B-cells, in lymphopenic RA patients.
Main Results:
- 15% of RA patients exhibited persistent lymphopenia (lymphocyte count < 1.00 X 10(9)/l) without Felty's syndrome.
- Lymphopenic RA patients showed a significant reduction in T-cell numbers (both CD4+ and CD8+), while B-cell counts remained normal.
- Lymphopenia was not correlated with disease activity or therapeutic interventions.
Conclusions:
- Persistent lymphopenia is a notable feature in a subset of RA patients.
- The reduction in T-cells, not B-cells, in lymphopenic RA suggests a specific immune dysregulation.
- Lymphopenia may serve as a potential indicator of more severe rheumatoid arthritis.