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JCC: 遗传易感性引起的肠屏障功能障碍是造成双胞胎患克罗恩病的主要原因

2018-11-10 MedSci MedSci原创

克罗恩病的病因尚不清楚。通过研究克罗恩病中未同时患病的双胞胎患者,研究人员旨在评估失调的肠屏障是否代表炎症的原因或后果,并评估遗传易感性对屏障功能的影响。

背景和目标
克罗恩病的病因尚不清楚。通过研究克罗恩病中未同时患病的双胞胎患者,研究人员旨在评估失调的肠屏障是否代表炎症的原因或后果,并评估遗传易感性对屏障功能的影响。

方法
研究人员对15对未同时患病的双胞胎克罗恩病患者[单卵核n= 9,双卵n= 6]和10个外部对照健康人进行回肠活组织检查,以评估51铬[Cr] -EDTA的细胞通透性和非致病性大肠杆菌K-12。免疫荧光和ELISA用于定量检测紧密连接蛋白的表达水平。

结果
健康的双胞胎和受影响的双胞胎在120分钟时均显示出增加的51Cr-EDTA通透性。组间没有观察到大肠杆菌传代的差异。紧密连接蛋白claudin-5和tricellulin的免疫荧光显示健康的双胞胎中的水平较低[p<0.05]和受影响的双胞胎[p]<0.05]比较高,而ELISA仅显示克罗恩病双胞胎中存在较低的三甲基纤维素[p<0.05]。

结论
本项研究结果表明,屏障功能障碍是克罗恩病的主要缺陷,肠屏障功能的改变主要见于受影响的同卵双胞胎。

原始出处:

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