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Updated: Dec 20, 2025

Real-time Visualization and Analysis of Chondrocyte Injury Due to Mechanical Loading in Fully Intact Murine Cartilage Explants
Published on: January 7, 2019
Mechanical loading induces HIF-1α expression in chondrocytes via YAP
Xingzhi Jing1, Xiaoxia Yang1, Weimin Zhang1
1Department of Spine Surgery, Shandong Provincial Hospital affiliated to Shandong First Medical University, 324 Jingwuweiqi Road, Jinan, Shandong, China.
Objectives:
To investigate the role of YAP in cyclic mechanical stress induced up-regulation of HIF-1α in rat cartilage chondrocytes.
Results:
Our in vitro and in vivo experiments demonstrated that cyclic mechanical stress promoted HIF-1α and YAP proteins expression in a magnitude dependent manner. Cyclic mechanical stress at 4000μ strain exhibited most significant effect in promoting HIF-1α and YAP up-regulation. Activation of YAP using LPA significantly promoted HIF-1α stabilization and expression, while YAP siRNA treatment suppressed the up-regulation of HIF-1α induced by cyclic mechanical stress.
Conclusion:
Our results indicated that cyclic mechanical stress promoted HIF-1α stabilization and YAP is involved in mechanical stress induced HIF-1α up-regulation.
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