USP7 调节TRPV1 脱化,以调节慢性细胞铁和缓解骨关节炎
Jun Li1, Ding Chen1, Wei-Ye Zhong1
1Department of Orthopedic Surgery, The Second Xiangya Hospital and Central South University, Changsha, Hunan, China.
The Kaohsiung journal of medical sciences
|January 9, 2026
概括
乌比基特异性蛋白酶7 (USP7) 通过防止状细胞铁亡,保护骨关节炎 (OA). USP7提高TRPV1的调节,减少细胞外基质的降解,并保持OA的关节健康.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 整形外科 整形外科 整形外科
背景情况:
- 骨关节炎 (OA) 是一种普遍存在的退行性关节疾病,其特征是状细胞功能障碍.
- 冠状细胞铁,一个调节的细胞死亡途径,在OA的发病过程中起着重要作用.
- 乌比基特异性蛋白酶7 (USP7) 在OA内的状细胞铁亡中的特定作用尚不清楚.
研究的目的:
- 研究USP7在OA期间的状细胞铁亡中的功能和机制.
- 确定USP7对OA冠状细胞中短暂受体潜在化物1 (TRPV1) 通道的影响.
- 评估USP7作为OA的潜在治疗点.
主要方法:
- 免疫组织化学,萨夫兰素O-快速绿色染色,RT-qPCR和西部涂抹被用于评估OA小鼠模型和软质细胞中的分子和组织病理变化.
- 在试验室内,OA模型是通过用IL-1β刺激小鼠初级肌肉细胞来建立的.
- 测量了细胞活力,活性氧物种 (ROS) 水平,脂质过氧化 (MDA) 和铁水平.
- 协同免疫沉降和免疫沉降试验被用于研究USP7-TRPV1相互作用和TRPV1无处不在.
主要成果:
- 发现USP7表达在OA小鼠和IL-1β治疗的冠状细胞中受到下调.
- 过度表达USP7显著抑制IL-1β诱导的铁和细胞外基质 (ECM) 降解.
- USP7使TRPV1的稳定性减弱并增强,反过来抑制IL-1β触发的冠状细胞铁和ECM降解.
- 沉默TRPV1扭转了USP7上调对OA进展的保护作用.
结论:
- USP7通过抑制状细胞铁和ECM降解,在OA中起着保护作用.
- USP7通过对TRPV1.1进行双化和上调来发挥其保护作用.
- USP7-TRPV1轴代表了缓解骨关节炎进展的新型治疗点.
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