LGR5型
Wnt信号通路
干细胞
细胞生物学
生物
再生(生物学)
肠上皮
转录因子
癌症研究
信号转导
上皮
遗传学
基因
作者
Xiangzhan Zhu,Minglei Yang,Zaijun Lin,Solomon Kibreab Mael,Ya Li,Lili Zhang,Yaqi Kong,Yaodong Zhang,Yuping Ren,Jianhui Li,Zimeng Wang,Ying Zhang,Bo Yang,Tingmei Huang,Fangxia Guan,Zhenlong Li,Robb E. Moses,Lei Li,Bing Wang,Xiaotao Li,Bianhong Zhang
标识
DOI:10.1007/s11427-021-2018-7
摘要
Leucine-rich repeat containing G protein-coupled receptor 5 (Lgr5), a marker of intestinal stem cells (ISCs), is considered to play key roles in tissue homoeostasis and regeneration after acute radiation injury. However, the activation of Lgr5 by integrated signaling pathways upon radiation remains poorly understood. Here, we show that irradiation of mice with whole-body depletion or conditional ablation of REGγ in Lgr5+ stem cell impairs proliferation of intestinal crypts, delaying regeneration of intestine epithelial cells. Mechanistically, REGγ enhances transcriptional activation of Lgr5 via the potentiation of both Wnt and Hippo signal pathways. TEAD4 alone or cooperates with TCF4, a transcription factor mediating Wnt signaling, to enhance the expression of Lgr5. Silencing TEAD4 drastically attenuated β-catenin/TCF4 dependent expression of Lgr5. Together, our study reveals how REGγ controls Lgr5 expression and expansion of Lgr5+ stem cells in the regeneration of intestinal epithelial cells. Thus, REGγ proteasome appears to be a potential therapeutic target for radiation-induced gastrointestinal disorders.
科研通智能强力驱动
Strongly Powered by AbleSci AI