Plasma selectins in patients with obstructive sleep apnea.

Area of Science:

• Cardiovascular Research
• Sleep Medicine
• Immunology

Background:

• Obstructive sleep apnea (OSA) is an established risk factor for cardiovascular diseases.
• Atherosclerotic plaque development involves specific adhesion molecules.
• Understanding OSA's impact on cardiovascular pathogenesis is crucial.

Purpose of the Study:

• To investigate plasma concentrations of E-selectin, L-selectin, and P-selectin in relation to OSA severity.
• To assess the role of these adhesion molecules in OSA-associated cardiovascular risk.
• To determine if selectin levels correlate with the apnea/hypopnea index (AHI).

Main Methods:

• Eighty male Caucasian patients (30-64 years) with varying OSA severity (AHI 0-4.9 to ≥31) were studied.
• Measurements included complete blood count, glucose tolerance, lipid profile, C-reactive protein, insulin, and plasma selectin levels.
• Patients were stratified into four groups based on AHI for comparative analysis.

Main Results:

• A progressive increase in plasma concentrations of E-selectin, L-selectin, and P-selectin was observed with increasing OSA severity.
• All three measured selectins showed a positive correlation with the apnea/hypopnea index.
• Elevated selectin levels were noted across different OSA severity groups.

Conclusions:

• Plasma levels of E-selectin, P-selectin, and L-selectin may serve as indicators of OSA severity.
• These adhesion molecules could contribute to the cardiovascular complications associated with OSA.
• Further research into selectin's role in OSA pathogenesis is warranted.