TFEB and TFE3 control glucose homeostasis by regulating insulin gene expression

被引:4
|
作者
Pasquier, Adrien [1 ]
Pastore, Nunzia [1 ,2 ]
D'Orsi, Luca [1 ]
Colonna, Rita [1 ]
Esposito, Alessandra [1 ]
Maffia, Veronica [1 ]
De Cegli, Rossella [1 ]
Mutarelli, Margherita [3 ]
Ambrosio, Susanna [1 ]
Tufano, Gennaro [1 ]
Grimaldi, Antonio [1 ]
Cesana, Marcella [1 ]
Cacchiarelli, Davide [1 ,2 ,4 ]
Delalleau, Nathalie [5 ,6 ]
Napolitano, Gennaro [1 ,2 ,4 ]
Ballabio, Andrea [1 ,2 ,4 ,7 ,8 ]
机构
[1] Telethon Inst Genet & Med TIGEM, Naples, Italy
[2] Univ Naples Federico II, Dept Med & Translat Sci, Med Genet Unit, Naples, Italy
[3] Natl Res Council ISASI CNR, Inst Appl Sci & Intelligent Syst, Pozzuoli, Italy
[4] Univ Naples Federico II, Sch Adv Studies, Genom & Expt Med Program, Naples, Italy
[5] Univ Lille, U1190, EGID, Lille, France
[6] INSERM, U1190, Lille, France
[7] Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA
[8] Texas Childrens Hosp, Jan & Dan Duncan Neurol Res Inst, Houston, TX 77030 USA
来源
EMBO JOURNAL | 2023年 / 42卷 / 21期
基金
欧洲研究理事会;
关键词
beta cells; glucose homeostasis; insulin; mTORC1; TFEB; TRANSCRIPTION FACTORS; BETA-CELLS; METABOLISM; AUTOPHAGY; MTORC1; ACID; RNA; IDENTITY; ROLES; MITF;
D O I
10.15252/embj.2023113928
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
To fulfill their function, pancreatic beta cells require precise nutrient-sensing mechanisms that control insulin production. Transcription factor EB (TFEB) and its homolog TFE3 have emerged as crucial regulators of the adaptive response of cell metabolism to environmental cues. Here, we show that TFEB and TFE3 regulate beta-cell function and insulin gene expression in response to variations in nutrient availability. We found that nutrient deprivation in beta cells promoted TFEB/TFE3 activation, which resulted in suppression of insulin gene expression. TFEB overexpression was sufficient to inhibit insulin transcription, whereas beta cells depleted of both TFEB and TFE3 failed to suppress insulin gene expression in response to amino acid deprivation. Interestingly, ChIP-seq analysis showed binding of TFEB to super-enhancer regions that regulate insulin transcription. Conditional, beta-cell-specific, Tfeb-overexpressing, and Tfeb/Tfe3 double-KO mice showed severe alteration of insulin transcription, secretion, and glucose tolerance, indicating that TFEB and TFE3 are important physiological mediators of pancreatic function. Our findings reveal a nutrient-controlled transcriptional mechanism that regulates insulin production, thus playing a key role in glucose homeostasis at both cellular and organismal levels. imagePancreatic beta-cells require precise nutrient-sensing mechanisms to control insulin production, yet the molecular pathways involved remain poorly understood. Here, genetic work identifies transcription factors TFEB and its homologue TFE3 as novel regulators of beta-cells and pancreas function in mice, controlling their adaptive response to environmental cues.The subcellular localization and activity of TFEB and TFE3 are modulated by nutrient availability in pancreatic beta cells.TFEB and TFE3 negatively regulate insulin gene expression in response to nutrient deprivation in pancreatic beta cells.Genetic manipulation of TFEB and TFE3 in beta cells affects body weight and glucose tolerance in mice. TFEB and its homologue TFE3 are novel regulators of beta-cells and pancreas function in the mouse controlling nutrient-dependent insulin production.image
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页数:15
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