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Endothelial Stat3 activation promotes osteoarthritis development.
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- Author(s): Li, Jiadong (AUTHOR); Zhang, Wencai (AUTHOR); Liu, Xinru (AUTHOR); Li, Guangfeng (AUTHOR); Gu, Yuyuan (AUTHOR); Zhang, Kun (AUTHOR); Shen, Fuming (AUTHOR); Wu, Xiang (AUTHOR); Jiang, Yingying (AUTHOR); Zhang, Qin (AUTHOR); Zhou, Fengjin (AUTHOR); Xu, Ke (AUTHOR); Su, Jiacan (AUTHOR)
- Source:
Cell Proliferation. Dec2023, Vol. 56 Issue 12, p1-17. 17p. - Source:
- Additional Information
- Subject Terms:
- Abstract: The mechanism of the balance between subchondral angiogenesis and articular damage within osteoarthritis (OA) progression remains a mystery. However, the lack of specific drugs leads to limited clinical treatment options for OA, frequently failing to prevent eventual joint destruction in patients. Increasing evidence suggests that subchondral bone angiogenesis precedes cartilage injury, while proliferating endothelial cells (ECs) induce abnormal bone formation. Signal transducer and activator of transcription 3 (Stat3) is triggered by multiple cytokines in the OA microenvironment. Here, we observed elevated Stat3 activation in subchondral bone H‐type vessels. Endothelial Stat3 activation will lead to stronger cell proliferation, migration and angiogenesis by simulating ECs in OA. In contrast, either Stat3 activation inhibition or knockdown of Stat3 expression could relieve such alterations. More interestingly, blocking Stat3 in ECs alleviated angiogenesis‐mediated osteogenic differentiation and chondrocyte lesions. Stat3 inhibitor reversed surgically induced subchondral bone H‐type vessel hyperplasia in vivo, significantly downregulating vessel volume and vessel number. Due to the reduced angiogenesis, subchondral bone deterioration and cartilage loss were alleviated. Overall, our data suggest that endothelial Stat3 activation is an essential trigger for OA development. Therefore, targeted Stat3 blockade is a novel promising therapeutic regimen for OA. [ABSTRACT FROM AUTHOR]
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