初级毛的完整性决定了TRPV4介导的NF-κB/COL2信号传递在骨关节炎的发病过程中
Yuyan Sun1, Ziyu Luo1, Haiqi Zhou2
1Department of Rehabilitation, The Second Xiangya Hospital, Central South University, Changsha 410000, China.
Cellular signalling
|September 20, 2025
概括
初级毛对于感知软骨中的机械力量至关重要. 它们在骨关节炎 (OA) 中的丧失会破坏TRPV4通道功能,影响NF-κB和原生成,突出IFT88作为OA的潜在治疗标.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 生物物理学的生物物理.
背景情况:
- 骨关节炎 (OA) 的特点是慢性细胞机械传导功能障碍.
- 主要毛对于状细胞机械感知和信号转导至关重要.
- 瞬态受体潜能瓦尼洛伊德4 (TRPV4) 是一种关键的机械转导蛋白,在初级眼上高度表达.
研究的目的:
- 研究OA中初级毛介导信号和TRPV4通道调节之间的相互作用.
- 阐明内鞭毛传输蛋白88 (Ift88) 在状细胞功能和OA病变发生过程中的作用.
主要方法:
- 来自OA患者和IF88条件淘汰赛 (cKO) 小鼠的冠状状细胞分析.
- 测量状细胞发生率,TRPV4表达和 (Ca2+) 流量.
- 染色体免疫沉 (ChIP) 测试用于评估转录因子结合.
主要成果:
- 在OA冠状细胞和Ift88 cKO小鼠中,表细胞发生率降低和软骨退化.
- 随着状细胞完整性下降,TRPV4的表达增加.
- 在健康的软骨细胞中,TRPV4对抗作用促进了COL2合成,并抑制了NF-κB激活,其效应被状细胞缺陷消除了.
结论:
- 主性毛是TRPV4介导的NF-κB和COL2信号的不可或缺的调节者.
- 失去了状细胞的完整性会破坏TRPV4通道的功能,从而导致OA的发病.
- IFT88被确定为OA的关键调节器和潜在的治疗检查点.
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