核受体
加压器
核受体辅阻遏物1
生物
内分泌学
碳水化合物代谢
内科学
葡萄糖稳态
细胞生物学
胰岛素
生物化学
胰岛素抵抗
转录因子
医学
基因
作者
Megan Ritter,Izuki Amano,Anne H. van der Spek,Adam C. Gower,Hendrik J Undeutsch,Victor A P Rodrigues,Hanix E Daniel,Anthony N. Hollenberg
出处
期刊:Endocrinology
[The Endocrine Society]
日期:2024-07-26
卷期号:165 (9)
被引量:1
标识
DOI:10.1210/endocr/bqae100
摘要
Abstract Nuclear receptor action is mediated in part by the nuclear receptor corepressor 1 (NCOR1) and the silencing mediator of retinoic acid and thyroid hormone receptor (SMRT). NCOR1 and SMRT regulate metabolic pathways that govern body mass, insulin sensitivity, and energy expenditure, representing an understudied area in the realm of metabolic health and disease. Previously, we found that NCOR1 and SMRT are essential for maintaining metabolic homeostasis and their knockout (KO) leads to rapid weight loss and hypoglycemia, which is not survivable. Because of a potential defect in glucose absorption, we sought to determine the role of NCOR1 and SMRT specifically in intestinal epithelial cells (IECs). We used a postnatal strategy to disrupt NCOR1 and SMRT throughout IECs in adult mice. These mice were characterized metabolically and underwent metabolic phenotyping, body composition analysis, and glucose tolerance testing. Jejunal IECs were isolated and profiled by bulk RNA sequencing. We found that the postnatal KO of NCOR1 and SMRT from IECs leads to rapid weight loss and hypoglycemia with a significant reduction in survival. This was accompanied by alterations in glucose metabolism and activation of fatty acid oxidation in IECs. Metabolic phenotyping confirmed a reduction in body mass driven by a loss of body fat without altered food intake. This appeared to be mediated by a reduction of key intestinal carbohydrate transporters, including SGLT1, GLUT2, and GLUT5. Intestinal NCOR1 and SMRT act in tandem to regulate glucose levels and body weight. This in part may be mediated by regulation of intestinal carbohydrate transporters.
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