Nat Commun:溃疡性结肠炎患者的诱导类器官模型重现炎症反应

2021-01-20 xiaozeng MedSci原创

溃疡性结肠炎(UC)是炎症性肠病(IBD)的两种主要类型之一,且是结肠的一种衰弱性炎症,通常在成年后开始出现。

溃疡性结肠炎(UC)是炎症性肠病(IBD)的两种主要类型之一,且是结肠的一种衰弱性炎症,通常在成年后开始出现。尽管目前尚不清楚该疾病的确切的发病机理,但目前的研究显示,粘液分泌的缺乏、间质分泌的可溶性炎症介质的浓度升高、伤口和上皮屏障的通透性在UC的发生发展过程中起着关键的早期作用。

在临床上,UC是异质的,包括结肠的急性到慢性炎症反应。由于该病的发病机理未知,且采取的医学干预是非特异性的,因此会导致患者的治疗反应不一致。对于这些疗法具有不良反应的患者会出现严重的症状,最终可能导致结肠和直肠的切除。

诱导类器官模型

由于缺乏基于患者个体异质性的预测模型,因此急需更完整的实验模型来概括UC的复杂性。

iHUCOs模型的UC特征

多能干细胞(PSC)衍生的人肠道类器官目前已被开发用于构建中/后肠和结肠类器官模型,且在推进精准医学方面具有明显的优势。在该研究中,研究人员通过诱导多能干细胞(iPSC)建立诱导人UC衍生类器官(iHUCO)模型,并将其与诱导人正常类器官模型(iHNO)进行比较。

repertaxin可减轻UC的发生发展

值得注意的是,iHUCOs表现出原发性结肠组织的组织学和功能特征,包括在上皮屏障中不存在酸性粘液的分泌和异常粘附连接。研究人员发现,CXCL8/CXCR1通路在iHUCO模型中过表达,而在iHNO中并无过表达现象。进一步的机制研究显示,小分子非竞争性抑制剂repertaxin能够通过对CXCL8受体的抑制作用,从而减弱UC的发生发展。


总而言之,以上研究结果揭示,既有上皮区又有基质区的患者类器官模型或可用于UC潜在发病机制的探究,同时也可为患者个体量身定制相应的干预措施


原始出处:

Sarvestani, S.K., Signs, S., Hu, B. et al. Induced organoids derived from patients with ulcerative colitis recapitulate colitic reactivity. Nat Commun 12, 262 (11 January 2021).

 

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    2021-08-05 liuli5079
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    2021-06-30 liye789132251
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    2021-12-29 nymo
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    2021-01-21 CHANGE

    梅斯里提供了很多疾病的模型计算公式,赞一个!

    0

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    2021-01-20 ms1000001332061167

    不错

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