Obesity-associated variants within FTO form long-range functional connections with IRX3
| العنوان: | Obesity-associated variants within FTO form long-range functional connections with IRX3 |
|---|---|
| المؤلفون: | Nora F. Wasserman, Noboru J. Sakabe, Miguel Manzanares, Ivy Aneas, Niki Alizadeh Vakili, Davis Tam, José Luis Gómez-Skarmeta, Juan J. Tena, Kyoung-Han Kim, Eric R. Gamazon, Ju Hee Lee, Chi-chung Hui, Marcelo A. Nobrega, Joe Eun Son, Carlos Gómez-Marín, Flavia L. Credidio, Débora R. Sobreira, Scott Smemo, Rafael D. Acemel, Silvia Naranjo, Andras Nagy, Hoon Ki Sung, Vijitha Puviindran, Nancy J. Cox, Michael Shen |
| المساهمون: | Junta de Andalucía, Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, National Institutes of Health (US), Ministerio de Economía y Competitividad (España) |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Nature Publishing Group, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Regulation of gene expression, Genetics, Quantitative trait loci, Multidisciplinary, endocrine system diseases, Transcriptional regulatory elements, Intron, nutritional and metabolic diseases, Single-nucleotide polymorphism, Genome-wide association study, Biology, Phenotype, Gene regulation, Alpha-Ketoglutarate-Dependent Dioxygenase FTO, Obesity, Enhancer, Gene |
| الوصف: | PMCID: PMC4113484.-- et al. Genome-wide association studies (GWAS) have reproducibly associated variants within introns of FTO with increased risk for obesity and type 2 diabetes (T2D). Although the molecular mechanisms linking these noncoding variants with obesity are not immediately obvious, subsequent studies in mice demonstrated that FTO expression levels influence body mass and composition phenotypes. However, no direct connection between the obesity-associated variants and FTO expression or function has been made. Here we show that the obesity-associated noncoding sequences within FTO are functionally connected, at megabase distances, with the homeobox gene IRX3. The obesity-associated FTO region directly interacts with the promoters of IRX3 as well as FTO in the human, mouse and zebrafish genomes. Furthermore, long-range enhancers within this region recapitulate aspects of IRX3 expression, suggesting that the obesity-associated interval belongs to the regulatory landscape of IRX3. Consistent with this, obesity-associated single nucleotide polymorphisms are associated with expression of IRX3, but not FTO, in human brains. A direct link between IRX3 expression and regulation of body mass and composition is demonstrated by a reduction in body weight of 25 to 30% in Irx3-deficient mice, primarily through the loss of fat mass and increase in basal metabolic rate with browning of white adipose tissue. Finally, hypothalamic expression of a dominant-negative form of Irx3 reproduces the metabolic phenotypes of Irx3-deficient mice. Our data suggest that IRX3 is a functional long-range target of obesity-associated variants within FTO and represents a novel determinant of body mass and composition. This work was funded by grants from the National Institutes of Health (DK093972, HL119967, HL114010 and DK020595) to M.A.N. and (MH101820, MH090937 and DK20595) to N.J.C. J.L.G.-S. was funded by grants from the Spanish Ministerio de Economía y Competitividad (BFU2010-14839, CSD2007-00008) and the Andalusian Government (CVI-3488). C.-C.H. was supported by a grant from the Canadian Institute of Health Research. K.-H.K. is supported by a fellowship from the Heart and Stroke Foundation of Canada. S.S. is supported by an NIH postdoctoral training grant (T32HL007381) |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf45e804210869a3b19bebe1e65bfcd1Test http://hdl.handle.net/10261/129403Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bf45e804210869a3b19bebe1e65bfcd1 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |