在脊椎间盘的静态和动态压缩过程中,TRPV4通过差异控制炎症性细胞因子网络
Garrett W D Easson1,2, Alireza Savadipour1,2,3, Christian Gonzalez4
1Department of Orthopaedic Surgery Washington University in St. Louis St. Louis Missouri USA.
JOR spine
|December 29, 2023
概括
在机械负荷下,暂时受体潜在化物4 (TRPV4) 通道调节椎间盘 (IVD) 中的炎症性细胞因子产生. TRPV4的激活升高保护性细胞因子的调节,并抑制免疫细胞的招募,保持IVD的恒常性.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 机械生物学 机械生物学
背景情况:
- 椎间盘 (IVD) 依赖离子通道TRPV4来感知机械力.
- 抑制TRPV4可以防止静态过载引起的IVD退化.
- 在不同的负载条件下,TRPV4在调解炎症性细胞因子表达中的作用尚未完全理解.
研究的目的:
- 研究TRPV4信号如何调解细胞因子表达,以应对IVD中的静态和动态负载.
- 确定TRPV4在维护IVD稳态和机械应力下机械转导中的作用.
主要方法:
- 鼠标功能脊柱单位经历了周期性或静态压缩,长达5天.
- 使用微珠阵列收集和分析44种细胞因子的条件介质,有或没有TRPV4抑制.
- 建立相关网络来探索在加载和TRPV4抑制期间的细胞因子调节关系.
主要成果:
- TRPV4激活增加了IL-6家族细胞因子,并减少了T细胞和单细胞化学因子.
- 动态和静态负载诱导独特的化学因子相关网络.
- 在动态加载时的TRPV4抑制失调了LIF信号;在静态加载时,它破坏了IL-16和VEGFA连接.
结论:
- 在对动态和静态机械负荷的反应中,TRPV4关键地调节了IVD细胞因子的产生.
- TRPV4的激活升级抑制免疫细胞化学反应的细胞因子,这表明它在维护IVD免疫特权方面发挥了作用.
- 了解TRPV4在机械传导和免疫调节中的作用是开发IVD退化疗法的关键.
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