Intestinal Gpr17 deficiency improves glucose metabolism by promoting GLP-1 secretion.

Intestinal Gpr17 deficiency improves glucose metabolism by promoting GLP-1 secretion.
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肠道GPR17缺乏通过促进GLP-1分泌来改善葡萄糖代谢。

DOI:
10.1016/j.celrep.2021.110179
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发表时间:
2022-01-04
期刊:
影响因子:
8.8
通讯作者:
Ren H
Ren H
中科院分区:
生物学1区
文献类型:
--
作者:
Yan S;Conley JM;Reilly AM;Stull ND;Abhyankar SD;Ericsson AC;Kono T;Molosh AI;Kubal CA;Evans-Molina C;Ren H

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肠内分泌细胞(EECs)中的G蛋白偶联受体(GPCRs)对营养、神经和微生物信号作出反应,并调节肠道激素的释放。在这里,我们表明,Gpr 17,孤儿GPCR,是共同表达的胰高血糖素样肽-1(GLP-1)表达的人和啮齿动物肠上皮细胞。肠上皮中Gpr 17的急性基因消融改善了葡萄糖耐量和葡萄糖刺激的胰岛素分泌(GSIS)。重要的是,诱导型基因敲除(iKO)小鼠和Gpr 17缺失型肠类器官对葡萄糖或脂质摄入产生反应,GLP-1分泌增加,但其他肠促胰岛素葡萄糖依赖性促胰岛素多肽(GIP)分泌增加。在体外EEC模型中,Gpr 17的过表达或激动降低电压门控钙电流并减少环AMP(cAMP)产生,这是调节GLP-1分泌的两个关键因素。总之,我们的工作表明,肠道GPR 17信号传导作为抑制途径的GLP-1分泌的EECs,这表明肠道GPR 17是一个潜在的目标,糖尿病和肥胖干预。Yan等人在人和啮齿动物肠上皮的肠内分泌细胞中定位了GPR 17表达。他们发现GPR 17信号传导抑制细胞内cAMP和钙的上升,啮齿动物肠道Gpr 17的丢失通过增加激素分泌来响应营养摄入而导致更好的葡萄糖耐量。
G protein-coupled receptors (GPCRs) in intestinal enteroendocrine cells (EECs) respond to nutritional, neural, and microbial cues and modulate the release of gut hormones. Here we show that Gpr17, an orphan GPCR, is co-expressed in glucagon-like peptide-1 (GLP-1)-expressing EECs in human and rodent intestinal epithelium. Acute genetic ablation of Gpr17 in intestinal epithelium improves glucose tolerance and glucose-stimulated insulin secretion (GSIS). Importantly, inducible knockout (iKO) mice and Gpr17 null intestinal organoids respond to glucose or lipid ingestion with increased secretion of GLP-1, but not the other incretin glucose-dependent insulinotropic polypeptide (GIP). In an in vitro EEC model, overexpression or agonism of Gpr17 reduces voltage-gated calcium currents and decreases cyclic AMP (cAMP) production, and these are two critical factors regulating GLP-1 secretion. Together, our work shows that intestinal Gpr17 signaling functions as an inhibitory pathway for GLP-1 secretion in EECs, suggesting intestinal GPR17 is a potential target for diabetes and obesity intervention. Yan et al. locate GPR17 expression in the enteroendocrine cells of human and rodent intestinal epithelium. They find that GPR17 signaling inhibits intracellular rise of cAMP and calcium and that loss of intestinal Gpr17 in rodents leads to better glucose tolerance via increased hormone secretion in response to nutrient ingestion.
DOI: 10.1007/978-3-319-70178-3_4
发表时间: 2017-01-01
期刊: SEX AND GENDER FACTORS AFFECTING METABOLIC HOMEOSTASIS, DIABETES AND OBESITY
影响因子: --
作者:
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下丘脑胰高血糖素样肽1受体足够,但对于调节小鼠的能量平衡和葡萄糖稳态不需要。
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