J Gastroenterology: 克罗恩病患者中肠源干细胞的修饰与疾病活动存在相互影响

2018-09-08 MedSci MedSci原创

肠干细胞(ISCs)在维持体内平衡以及受损肠上皮的再生中发挥着不可或缺的作用。然而,克罗恩病(CD)的炎症环境是否会影响常驻小肠干细胞的特性仍然不明确,本项研究通过体外实验阐明了他们之间的关系。

背景
干细胞(ISCs)在维持体内平衡以及受损肠上皮的再生中发挥着不可或缺的作用。然而,克罗恩病(CD)的炎症环境是否会影响常驻小肠干细胞的特性仍然不明确,本项研究通过体外实验阐明了他们之间的关系。

方法
研究人员从处于克罗恩病活动期病变(aCD-SIO)患者的肠镜活检标本或处于缓解期的患者的肠道粘膜(rCD-SIO)标本来建立CD患者来源的小肠类器官。通过免疫组织化学以及单细胞多重基因表达分析检查肠干细胞标记基因在哪些类器官中的表达。并使用单细胞器官改造来测定评估类器官细胞的ISC特异性功能。

结果
ISC标记基因OLFM4和SLC12A2通过CD激活损伤的小肠上皮细胞增加肠细胞数量来大量表达。研究人员成功建立了aCD-SIO,rCD-SIO或非IBD对照(NI-SIO)共9例实验模型。免疫组织化学显示所有类器官中OLFM4和SLC12A2表达水平相当。从总共1215个细胞中获得12个ISC标记的单细胞基因表达数据。t分布随机邻域嵌入分析鉴定了候选ISC的簇,并且还揭示了源自aCD-SIO的ISC簇分类细胞中SMOC2和LGR5的不同表达模式。单细胞器官重组测定显示,与来自NI-SIO的细胞相比,aCD-SIO细胞的重组效率显着提高。

结论
aCD-SIO含有具有高度活化的ISC,并且还具有高的类器官重组能力。本项研究结果显示在CD的炎症环境中不明因素影响了小肠干细胞特性。

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    2018-12-29 许安
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    2018-09-10 zhangyxzsh
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    2018-09-09 kafei

    学习了谢谢

    0

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目前我们对于克罗恩病患者小肠内细菌过度生长与克罗恩病肠道炎症以及全身炎症之间存在怎样的联系还不清楚,因此本项研究探究了克罗恩病(CD)门诊患者中小肠细菌过度生长(SIBO)的患病率和预测因子以及SIBO与肠道和/或全身炎症之间的关系。

JCC:反应性试验后主动监测英夫利西单抗浓度可以获得更好的临床结局

反应性检测已成为炎症性肠病中应对英夫利昔单抗应答失效的新标准。最近的数据表明,主动的英夫利昔单抗监测与IBD的更好治疗结果相关。本项研究的目标是评估反应性试验后对IBD患者进行主动性英夫利昔单抗监测的远期效果。