Front Cardiovasc Med:肌成纤维细胞来源的外泌体引起心脏内皮细胞功能障碍

2021-06-26 “罂粟花”公众号 “罂粟花”公众号

背景

背景

内皮细胞(ECS)在维持血管稳态和心脏功能方面发挥着关键作用。结果表明,活化的成纤维细胞衍生的外泌体损害肥厚性心脏心肌细胞功能,但它们对ECS的影响尚不清楚。因此,我们假设激活的心肌成纤维细胞衍生的外泌体(FB-EXO)介导EC功能障碍,因此调节心肌成纤维细胞外泌体含量可以改善内皮功能。

方法和结果

从心肌成纤维细胞(FB) - 调节剂中分离出外泌体,并通过纳米颗粒跟踪分析和电子显微镜表征。从小鼠心脏中分离出内皮细胞。用从FB为条件的培养液中分离的外泌体处理内皮细胞,再用转化生长因子-β1(TGF-β1-FB-Exo)或磷酸盐(对照组)处理FB。血管内皮细胞功能受损(表现为血管内皮生长因子-A、HIF-1α、CD31和血管生成素1基因表达降低,管状形成和细胞迁移减少)。β-FB-Exo处理的细胞表现为血管内皮细胞功能减退(表现为血管内皮生长因子-A、HIF1mRNA、CD31mRNA和血管生成素1基因表达降低)。此外,转化生长因子-β1-FB-Exo处理的内皮细胞与对照组相比,细胞增殖减少,凋亡增加。转化生长因子受体-β1-FB-Exo Cargo分析显示纤维化相关miRNA发生改变,包括miR-200A-3p水平显着升高。有趣的是,miR-200A-3p抑制活化的FBS,减轻转化生长因子-β1-FB-Exo介导的内皮功能障碍。

结论

综上所述,本研究证实了激活的成纤维细胞来源的外泌体中富集的miR-200a-3p对内皮细胞生物学和功能的重要作用。

原始出处:

Ranjan P, Kumari R, Goswami SK, et al. Myofibroblast-Derived Exosome Induce Cardiac Endothelial Cell Dysfunction.Front Cardiovasc Med 2021;8

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    2021-07-29 quxin068
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外泌体(Exosome)是由活细胞分泌的直径约为30-150 nm的小囊泡,具有典型的脂质双分子层结构,广 泛存在于血液、唾液、尿液、脑脊液和乳汁等体液中,携带有多种蛋白质、脂类、RNA等重要信息,在

上海2021(第五届)外泌体与疾病研讨会(2021.4)

2021(第五届)外泌体与疾病研讨会

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COVID-19大流行为世界各国带来了巨大的经济和医疗负担。近日,来自美国的研究人员进行了一项前瞻性非随机开放标签队列研究,旨在探究异体骨髓间充质干细胞的外泌体(ExoFlo™)治疗重症C