在光滑肌细胞中L-Wnk1的删除会导致大动脉炎和炎症转移
Helene Quelquejay1, Rida Al-Rifai1, Michele Silvestro2
1Université de Paris, Inserm U970, Paris-Cardiovascular Research Center, France (H.Q., R.A.-R., M.V., I.F., T.M., X.Z., I.S.-Z., G.G., P.A., E.R., G.A., D.B., S.T., A.T., C.M.B., S.B., X.J., H.A.-O.).
Circulation research
|July 9, 2024
概括
在血管光滑肌细胞中无-氨酸1激酶 (Wnk1) 缺失驱动血管重塑和炎症,导致严重的动脉炎和小鼠腹部动脉动脉瘤.
科学领域:
- 心血管生物学 心血管生物学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 没有氨酸1激酶 (Wnk1) 的长异型是一种无处不在的氨酸/氨酸激酶.
- 在血管光滑肌细胞 (VSMC) 病理生理学中Wnk1的作用在很大程度上是未知的.
研究的目的:
- 研究Wnk1在VSMC中的功能作用,特别是在血管改造和动脉瘤形成的背景下.
- 确定Wnk1删除对VSMC表型和炎症反应的影响.
主要方法:
- 使用了具有VSMC特定Wnk1删除 (Sm22Cre+Wnk1flox/flox) 的小鼠模型.
- 试验性诱导大动脉动脉瘤使用血管素II输液在Apoe-/-小鼠.
- 进行单细胞RNA测序以分析动脉瘤大动脉中VSMC基因表达.
- 研究了Wnk1缺失对VSMC收缩功能,炎症媒介产生的影响,以及免疫细胞透.
- 评估了Wnk1删除对大动脉壁结构和细胞外矩阵组成的影响.
- 评估了阻断特定免疫通路 (γδ T 细胞,单细胞/巨细胞) 和TGF-β信号传递的治疗潜力.
主要成果:
- 单细胞RNA测序揭示了Wnk1缺乏的VSMCs表现出减少的收缩表型和增加的炎症活性.
- 在VSMCs中Wnk1的缺失导致了亲炎性表型,其特征是矩阵金属蛋白酶和细胞因子/化学因子的产生,导致免疫细胞的积累.
- Sm22Cre+Wnk1flox/flox小鼠自发地发展出严重的动脉炎,并在AngII输注后发生致命的腹部大动脉动脉瘤.
- 药物阻断的gδ T细胞或单细胞/巨细胞招募减弱的关节炎.
- 删除Wnk1诱导大动脉壁重塑,包括弹性质的破坏和增加的原沉积,以及增强的TGF-β1表达.
- 在Wnk1缺乏的小鼠中,TGF-β阻塞加剧了动脉瘤形成和大动脉破裂.
结论:
- Wnk1是VSMC功能的一个关键调节器.
- 删除Wnk1促进了致病性,促炎性VSMC表型.
- 在小鼠中,Wnk1缺乏会导致有害的血管改造和自发性严重的风炎.
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