[Endothelial dysfunction and early atherosclerosis in non-differentiated collagenosis]

Area of Science:

• Rheumatology
• Cardiovascular Medicine
• Immunology

Background:

• Systemic autoimmune diseases like rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) are linked to accelerated atherosclerosis and increased cardiovascular risks.
• Undifferentiated connective tissue disease (UCTD) may represent a preclinical stage of defined autoimmune conditions.

Purpose of the Study:

• To investigate endothelial dysfunction and accelerated atherosclerosis in patients with UCTD.
• To assess UCTD as a potential early phase of defined connective tissue diseases.

Main Methods:

• Twenty-two UCTD patients and 20 age/sex-matched controls were studied.
• High-resolution B-mode ultrasound measured carotid intima-media thickness (CCA-IMT) and brachial artery diameter (assessing endothelium-dependent and independent vasodilation).
• Clinical, demographic, and serological profiles were evaluated.

Main Results:

• No significant differences in traditional risk factors were observed between groups.
• Endothelium-dependent vasodilation was significantly impaired in UCTD patients (5.3%) compared to controls (8.85%, P < 0.002).
• No significant differences in endothelium-independent vasodilation or CCA-IMT were found; however, CCA-IMT correlated with age and anti-DNA antibody levels.

Conclusions:

• Reduced endothelium-dependent vasodilation in UCTD patients indicates early atherosclerotic processes before defined disease.
• Endothelium-dependent vasodilation is a sensitive marker for early atherosclerosis detection.
• A moderate correlation exists between CCA-IMT and anti-DNA antibody levels.