Mechanisms underlying end-organ injury in sleep apnoea.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing molecular and cellular mechanisms without original empirical data or systematic review methodology.
PubMed 41611254 · doi:10.1183/13993003.02397-2025
What was done
This narrative review synthesizes molecular and cellular pathways through which obstructive sleep apnoea causes end-organ morbidity. The authors examined the effects of chronic intermittent hypoxia on oxidative stress, downstream inflammatory pathways, cellular and tissue heterogeneity, and the shortcomings of conventional clinical metrics such as the apnoea-hypopnoea index and hypoxic burden.
What was found
The abstract provides no quantitative data or empirical metrics. Mechanistically, chronic intermittent hypoxia induces bursts of reactive oxygen species that exceed antioxidant capacity and activate NF-κB-driven inflammatory cascades (including tumour necrosis factor-α and interleukin-6). These pathways drive systemic sequelae such as endothelial dysfunction, hypertension, and insulin resistance. The authors note that biological responses vary markedly by tissue type (such as endothelium, adipose tissue, and specific brain regions) and that existing bulk metrics fail to reflect reoxygenation kinetics or cellular heterogeneity.
Why it matters
It provides a framework connecting the specific kinetics of intermittent hypoxia in sleep apnoea to molecular inflammation and distinct organ-specific pathologies, highlighting why standard diagnostic metrics fail to capture individual disease risk.
Limits
The abstract reports no primary data, systematic search methodology, or quantitative pooling. It relies on mechanistic narrative synthesis. Detailed clinical effect sizes, patient-level validation, and the degree of reversibility of tissue injury were not quantified.
Cited by
- supports Intermittent hypoxia from conditions such as sleep apnea generates reactive oxygen species (ROS).