Association between lipid peroxidation and inflammation in obstructive sleep apnoea

Area of Science:

• Cardiology
• Pulmonology
• Biochemistry

Background:

• Obstructive sleep apnoea (OSA) is linked to increased cardiovascular morbidity.
• Lipid peroxidation and inflammation are implicated in OSA pathogenesis.
• Obesity is a significant risk factor for OSA and cardiovascular disease.

Purpose of the Study:

• To investigate the relationship between OSA severity, obesity, and markers of lipid peroxidation and inflammation.
• To assess the impact of continuous positive airway pressure (nCPAP) treatment on these markers.

Main Methods:

• Studied 40 obese patients with OSA, 18 obese, and 12 lean subjects without OSA.
• Measured urinary 8-isoprostane and serum high-sensitivity C-reactive protein (hsCRP).
• Evaluated 20 OSA patients after 3 months of nCPAP treatment.

Main Results:

• Moderate-to-severe OSA patients showed significantly higher 8-isoprostane and hsCRP levels.
• 8-isoprostane correlated with OSA severity, hypoxia duration, BMI, and hsCRP.
• nCPAP treatment significantly reduced 8-isoprostane and hsCRP levels.

Conclusions:

• OSA severity and obesity independently elevate lipid peroxidation (8-isoprostane).
• OSA exacerbates inflammation and oxidative stress, potentially increasing cardiovascular risk in obese patients.
• nCPAP therapy effectively mitigates these biochemical abnormalities.