In aging skin, the circadian regulator BMAL1 and the mechanical-response protein YAP form a pathological partnership that amplifies chronic inflammation through enhanced activity at inflammatory gene enhancers. This mechanism reveals how age-associated changes in the skin's microenvironment disrupt normal inflammatory control, contributing to the inflammatory phenotype characteristic of advanced age.
Key Points
- BMAL1 and YAP cooperate to amplify inflammatory enhancers in aged skin
- Age-related microenvironmental changes drive the pathological BMAL1-YAP interaction
- Disrupted circadian-mechanical coupling maintains persistent epidermal inflammation
Longevity Analysis
The breakdown of circadian regulation in aging skin illustrates how interconnected physiological systems—here, circadian timing and mechanical signal response—become dyscoordinated with age. When these regulatory layers fail to work in sync, the skin shifts from maintaining homeostatic balance to amplifying chronic inflammation. This pattern suggests that interventions restoring circadian coherence or mechanotransduction fidelity in aged tissues could interrupt inflammatory amplification at the molecular level, addressing inflammation not through broad immunosuppression but through restoration of normal tissue logic.
Original published by Nature Aging, by Júlia Bonjoch.