Piezo1 activation restores bone's mechanical responsiveness in aged mice by enhancing connexin 43 signaling, which increases prostaglandin E2 release and suppresses sclerostin—reversing the anabolic deficit that normally accompanies aging. This mechanism identifies a specific target for restoring load-dependent bone formation in older individuals.
Key Points
- Piezo1 activation rescues aged bone anabolic response to mechanical loading
- Piezo1-Cx43 interaction drives PGE2 release and suppresses sclerostin expression
- PI3K-Akt signaling mediates hemichannel opening and bone formation enhancement
Longevity Analysis
Bone density and structural integrity decline with age due to impaired mechanotransduction—the process by which physical stress triggers cellular adaptation and bone formation. This research identifies why aged osteocytes fail to respond adequately to mechanical stimulation and demonstrates that restoring a single ion channel interaction can partially reverse that deficit. The finding matters because mechanical loading remains one of the few interventions reliably proven to maintain skeletal mass across the lifespan, yet its efficacy diminishes with age. By identifying the molecular bottleneck, this work suggests a pathway toward pharmacological rescue of load-dependent bone remodeling without requiring increased exercise stimulus, addressing a fundamental constraint in aging skeletal health.
Original published by Wiley Aging Cell, by Dezhi Zhao, Jiayue Fu, Han Liu, Shuting Liang, Mingming Song, Aining Zhang, Dong‐en Wang, Qianjin Guo, You Zhang, Jiawei Wu, Huiyun Xu .