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Elevated serum soluble CD44 level in sarcoidosis
1First Department of Internal Medicine, Tokyo Medical University, Shinjuku-ku, Tokyo 160-0023, Japan.
International Journal of Molecular Medicine
|November 18, 2000
Summary
Soluble CD44 (sCD44) levels are significantly elevated in the serum of sarcoidosis patients compared to healthy individuals. This finding suggests sCD44 may serve as a novel biomarker for sarcoidosis diagnosis and understanding its immunologic basis.
Area of Science:
- Immunology
- Pulmonology
- Biochemistry
Background:
- Sarcoidosis is a chronic, multi-organ granulomatous disease with an unclear cause.
- Immunologic factors are implicated in sarcoidosis pathogenesis.
- CD44 is a lymphocyte surface marker involved in cell adhesion.
Purpose of the Study:
- To investigate the role of soluble CD44 (sCD44) in sarcoidosis.
- To determine serum and bronchoalveolar lavage fluid (BALF) levels of sCD44 in sarcoidosis patients.
- To explore sCD44 as a potential immunologic marker for sarcoidosis.
Main Methods:
- Enzyme-linked immunosorbent assay (ELISA) was used to quantify sCD44 levels.
- Serum sCD44 was measured in 13 sarcoidosis patients and 56 healthy controls.
- BALF sCD44 was measured in 11 sarcoidosis patients and 10 healthy controls.
Main Results:
- Serum sCD44 levels were significantly higher in sarcoidosis patients (348.5+/-164.2 ng/ml) than in controls (145.4+/-22.9 ng/ml; p<0.001).
- BALF sCD44 levels showed a trend towards being higher in sarcoidosis patients but did not reach statistical significance.
- A positive correlation was observed between serum sCD44 and angiotensin-converting enzyme (ACE) levels (r=0.78).
Conclusions:
- Elevated serum sCD44 levels are associated with sarcoidosis.
- sCD44 may play a role in the immunologic processes underlying sarcoidosis.
- sCD44 shows potential as a novel diagnostic marker for sarcoidosis.