Zhang Xin, Shu Shibin, Feng Zhenhua, Qiu Yong, Bao Hongda, Zhu Zezhang
Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
Front Pharmacol. 2023 Jan 26;14:1102318. doi: 10.3389/fphar.2023.1102318. eCollection 2023.
Intervertebral disc degeneration (IDD) is the cardinal pathological mechanism that underlies low back pain. Mechanical stress of the intervertebral disc may result in a change in nucleus pulposus cells state, matrix degradation, and degeneration of the disc. Microtubules, which are components of the cytoskeleton, are involved in driving or regulating signal pathways, which sense and transmit mechano-transduction. Microtubule and the related proteins play an important role in the development of many diseases, while little is known about the role of microtubules in nucleus pulposus cells. Researchers have found that type II collagen (COL2) expression is promoted by microtubule stabilization in synovial mesenchymal stem cells. In this study, we demonstrated that microtubule stabilization promotes the expression of COL2 in nucleus pulposus cells. Stabilized microtubules stimulating Hippo signaling pathway, inhibiting YAP protein expression and activity. In addition, microtubules stabilization promotes the expression of COL2 and alleviates disc degeneration in rats. In summary, our study for the first time, identifies microtubule as a promising therapeutic target for IDD, up-regulating the synthesis of COL2 Hippo-Yap pathway. Our findings may provide new insights into the etiologies and pathology for IDD, further, targeting of microtubule acetylation may be an effective strategy for the treatment of IDD.
椎间盘退变(IDD)是下腰痛的主要病理机制。椎间盘的机械应力可能导致髓核细胞状态改变、基质降解以及椎间盘退变。微管作为细胞骨架的组成部分,参与驱动或调节感知和传递机械转导的信号通路。微管及其相关蛋白在许多疾病的发展中起重要作用,而关于微管在髓核细胞中的作用知之甚少。研究人员发现,微管稳定可促进滑膜间充质干细胞中II型胶原蛋白(COL2)的表达。在本研究中,我们证明微管稳定可促进髓核细胞中COL2的表达。稳定的微管刺激Hippo信号通路,抑制YAP蛋白的表达和活性。此外,微管稳定可促进COL2的表达并减轻大鼠椎间盘退变。总之,我们的研究首次确定微管是IDD的一个有前景的治疗靶点,可通过上调COL2的合成调节Hippo-Yap通路。我们的发现可能为IDD的病因和病理提供新的见解,此外,靶向微管乙酰化可能是治疗IDD的有效策略。
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