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miR-495通过降低神经-1-酸盐的调节促进肠上皮细胞的亡

Ruiyun Li^1,2, Cassandra Cairns², Ting-Xi Yu^1,2

¹Baltimore Veterans Affairs Medical Center, Baltimore, Maryland, USA.

Physiological reports

|September 11, 2024

概括

微RNA 495 (miR-495) 通过降低氨酸激酶1 (SphK1) 和氨酸-1-酸盐 (S1P) 生产来负面调节肠道屏障功能,影响细胞增殖和完整性.

科学领域:

胃肠病学胃肠病学
分子生物学分子生物学
细胞生物学细胞生物学

背景情况:

肠上皮质完整性对于屏障功能至关重要,病理状况往往会损害它.
众所周知,神素-1-酸盐 (S1P) 可以增强肠道屏障的完整性,但其确切的机制尚不清楚.
斯芬哥辛激酶1 (SphK1) 是S1P合成中的速度限制酶,其过度表达会增加S1P和细胞增殖.

研究的目的:

研究微RNA 495 (miR-495) 在调节肠上皮质完整性和增殖中的作用.
阐明miR-495通过哪种分子机制影响神素激酶1 (SphK1) 和神素-1-酸盐 (S1P) 途径.

主要方法:

评估miR-495上调对SphK1mRNA和肠上皮细胞蛋白质水平的影响.
评估miR-495对细胞增殖,细胞亡和屏障蛋白表达的影响.
分析转基因miR-495表达对肠粘膜生长和对损伤的反应 (切卡结合-穿刺) 的后果.

主要成果:

miR-495的上调直接降低了SphK1mRNA水平,导致SphK1和S1P的产生减少.
在肠道细胞中增加miR-495的表达减少了增殖,增加了亡.
转基因miR-495的表达抑制了粘膜生长,降低了密室增殖,降低了屏障蛋白,并在体内加剧了损伤.

结论:

miR-495作为肠表皮保护和增殖的关键负调节剂.
这种调节通过直接准SphK1来发生,S1P合成的关键酶.
了解这个miR-495/SphK1/S1P轴对于解决肠道屏障功能受损的疾病至关重要.

关键词:

在 IEC-6 单元中,斯芬戈辛-1-酸盐 (S1P) 是一种肠道粘膜损伤肠道粘膜损伤微RNAs 是一个微型RNA.斯芬戈氨酸激酶 1 的作用.

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