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Gut-liver axis calibrates intestinal stem cell fitness
Cell ( IF 45.5 ) Pub Date : 2024-01-26 , DOI: 10.1016/j.cell.2024.01.001
Girak Kim 1 , Zuojia Chen 1 , Jian Li 1 , Jialie Luo 1 , Felipe Castro-Martinez 1 , Jan Wisniewski 1 , Kairong Cui 2 , Yan Wang 3 , Jialei Sun 4 , Xiaobai Ren 5 , Susan E Crawford 6 , S Patricia Becerra 7 , Jimin Zhu 4 , Taotao Liu 4 , Sui Wang 5 , Keji Zhao 2 , Chuan Wu 1
Affiliation  

The gut and liver are recognized to mutually communicate through the biliary tract, portal vein, and systemic circulation. However, it remains unclear how this gut-liver axis regulates intestinal physiology. Through hepatectomy and transcriptomic and proteomic profiling, we identified pigment epithelium-derived factor (PEDF), a liver-derived soluble Wnt inhibitor, which restrains intestinal stem cell (ISC) hyperproliferation to maintain gut homeostasis by suppressing the Wnt/β-catenin signaling pathway. Furthermore, we found that microbial danger signals resulting from intestinal inflammation can be sensed by the liver, leading to the repression of PEDF production through peroxisome proliferator-activated receptor-α (PPARα). This repression liberates ISC proliferation to accelerate tissue repair in the gut. Additionally, treating mice with fenofibrate, a clinical PPARα agonist used for hypolipidemia, enhances colitis susceptibility due to PEDF activity. Therefore, we have identified a distinct role for PEDF in calibrating ISC expansion for intestinal homeostasis through reciprocal interactions between the gut and liver.

中文翻译:


肠-肝轴校准肠道干细胞适应性



肠道和肝脏被认为通过胆道、门静脉和体循环相互交流。然而,目前尚不清楚这条肠-肝轴如何调节肠道生理学。通过肝切除术以及转录组学和蛋白质组学分析,我们鉴定了色素上皮衍生因子 (PEDF),一种肝源性可溶性 Wnt 抑制剂,它通过抑制 Wnt/β-catenin 信号通路来抑制肠道干细胞 (ISC) 过度增殖以维持肠道稳态。此外,我们发现肝脏可以感知肠道炎症引起的微生物危险信号,导致通过过氧化物酶体增殖物激活受体α (PPARα) 抑制 PEDF 的产生。这种抑制释放 ISC 增殖以加速肠道中的组织修复。此外,用非诺贝特(一种用于低脂血症的临床 PPARα 激动剂)治疗小鼠,可增强 PEDF 活性引起的结肠炎易感性。因此,我们已经确定了 PEDF 通过肠道和肝脏之间的相互相互作用在校准肠道稳态的 ISC 扩张中的独特作用。
更新日期:2024-01-26
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