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Hypoxia-Induced Insulin Resistance Mediates the Elevated Cardiovascular Risk in Patients with Obstructive Sleep
María M Adeva-Andany1, Alberto Domínguez-Montero1, Elvira Castro-Quintela1
1Internal Medicine Department, Hospital General Juan Cardona, 15406 Ferrol, Spain.
Reviews in Cardiovascular Medicine
|July 30, 2024
Summary
Tissue hypoxia from obstructive sleep apnea (OSA) drives insulin resistance and related health issues like type 2 diabetes and cardiovascular disease, independent of body mass index.
Area of Science:
- Endocrinology
- Sleep Medicine
- Cardiovascular Science
Background:
- Obstructive sleep apnea (OSA) is strongly linked to insulin resistance and its severe health consequences.
- These complications, including cardiovascular disease and type 2 diabetes, persist even in OSA patients without general obesity.
Purpose of the Study:
- To investigate the role of tissue hypoxia in driving insulin resistance in patients with OSA.
- To elucidate the molecular mechanisms linking hypoxia to insulin resistance and its clinical manifestations.
Main Methods:
- Analysis of oxyhemoglobin desaturation indicators in relation to insulin resistance.
- Examination of hypoxia-inducible factor-1 (HIF-1) and peroxisome proliferator-activated receptor-gamma (PPAR-γ) pathways in adipose tissue.
- Correlation of PPAR-γ activity with glucose uptake and fat accumulation in adipocytes.
Main Results:
- Oxyhemoglobin desaturation is independently associated with insulin resistance and its clinical outcomes in OSA patients.
- Hypoxia-induced insulin resistance involves HIF-1 upregulation and PPAR-γ downregulation.
- PPAR-γ downregulation in adipose tissue impairs glucose uptake and promotes insulin resistance.
Conclusions:
- Tissue hypoxia is the primary driver of insulin resistance in OSA patients, irrespective of body mass index.
- Understanding these hypoxia-mediated pathways is crucial for managing metabolic and cardiovascular complications in OSA.
Keywords:
cardiovascular riskchronic kidney diseasediabetesessential hypertensionhypertriglyceridemiametabolic syndromenon-alcoholic fatty liver diseasetissue hypoxiavisceral obesityMore Related Videos
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