Obstructive sleep apnea as a risk factor for type 2 diabetes mellitus

Area of Science:

• Sleep Medicine
• Endocrinology
• Cardiology

Background:

• Obstructive sleep apnea (OSA) is linked to cardiovascular and cardiometabolic risks.
• Physiologic disturbances from OSA, like hypoxia and sleep fragmentation, are associated with insulin resistance and type 2 diabetes mellitus (T2DM).
• A bidirectional relationship exists between OSA and T2DM, with T2DM potentially worsening OSA features.

Purpose of the Study:

• To review the links and bidirectional associations between OSA and T2DM.
• To examine the pathogenic mechanisms connecting these conditions.
• To assess the role of continuous positive airway pressure (CPAP) therapy in managing glucose metabolism and its clinical implications.

Main Methods:

• Literature review of epidemiologic, animal, and human studies.
• Analysis of pathogenic mechanisms linking OSA and T2DM.
• Evaluation of studies on CPAP therapy's effects on glucose tolerance, sensitivity, and resistance.

Main Results:

• OSA is independently associated with increased cardiovascular and cardiometabolic risk.
• Pathogenic mechanisms include intermittent hypoxia, sleep fragmentation, and autonomic dysfunction.
• Evidence suggests CPAP may improve glucose metabolism, though this remains debated.

Conclusions:

• OSA and T2DM share complex bidirectional links and underlying pathogenic mechanisms.
• CPAP therapy shows potential for improving glucose control in patients with OSA.
• Further research is needed to clarify the therapeutic benefits of CPAP in T2DM management.