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Obesity-associated variants within FTO form long-range functional connections with IRX3

ABSTRACT: Obesity-associated variants within FTO form long-range functional connections with IRX3

PROVIDER: PRJNA230260 | ENA |

REPOSITORIES: ENA

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Obesity-associated variants within FTO form long-range functional connections with IRX3

Project description:Genome-wide association studies in diverse populations have reproducibly associated variants within introns of FTO with increased risk for obesity and type-2 diabetes.While 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. Yet, no direct connection between the obesity-associated intronic variants and FTO expression or function has been made. We show that the obesity-associated noncoding sequences within FTO are functionally connected, at megabase distances, primarily with the homeobox gene IRX3, rather than with FTO. 4C-seq samples for Fto/fto and Irx3/irx3a genes promoters in different samples: adult mouse brain, E9.5 mouse embryos and 24hpf zebrafish embryos.

2014-02-24 | E-GEOD-52830 | biostudies-arrayexpress

Obesity-associated variants within FTO form long-range functional connections with IRX3

2014-02-24 | GSE52830 | GEO

Obesity-associated variants within FTO form long-range functional connections with IRX3.

Project description: Not available

| S-EPMC4113484 | biostudies-literature

Circular chromatin conformation capture (4C-seq) experiments for viewpoints on the promoters of Rpgrip1l/Fto, Irx3, Irx5 and Irx6 in mouse hypothalamus

Project description:We performed 4C to analyze long-range interactions between the promoters of Rpgrip1l/Fto, Irx3, Irx5 and Irx6 and a region in the first intron of the FTO gene that has been associated with obesity. 3 whole mouse hypothalami were used to obtain the data.

2021-03-20 | E-MTAB-10195 | biostudies-arrayexpress

Next Generation Sequencing of BMDM overexpressing GFP, IRX3-WT, IRX3-S361A and IRX3-S389A

Project description:IRX3 is a transcriptional factor, which play important functions in developmental processes. But the role of IRX3 in immune cells are less studied. So we sequenced mRNA from BMDMs overexpressing GFP, IRX3, as well as two phosphorylation site mutants-S361A and S389A respectively, to address the roles of IRX3 in macrophages.

2021-07-29 | GSE178574 | GEO

Frequent derepression of the Iroquois homeobox gene IRX3 in human acute leukemia

Project description:The Iroquois homeodomain transcription factor gene IRX3 is highly expressed in the developing nervous system, limb buds and heart. In adults, expression levels specify risk of obesity. We now report a significant functional role for IRX3 in human acute leukemia. While transcript levels are very low in normal human bone marrow cell populations, high level IRX3 expression is observed in ~30% of patients with acute myeloid leukemia (AML), ~50% of patients with T-acute lymphoblastic leukemia and ~20% of patients with B-acute lymphoblastic leukemia, typically in association with high levels of HOXA9. Expression of IRX3 alone was sufficient to immortalise murine bone marrow stem and progenitor cells, and induce T- and B-lineage leukemias in vivo with incomplete penetrance. IRX3 knockdown induced terminal differentiation of AML cells. Combined IRX3 and Hoxa9 expression in murine bone marrow stem and progenitor cells substantially enhanced the morphologic and phenotypic differentiation block of the resulting AMLs by comparison with Hoxa9-only leukemias, through suppression of a myelomonocytic program. Likewise, in cases of primary human AML, high IRX3 expression is associated with reduced myelomonocytic differentiation. Thus, tissue-inappropriate derepression of IRX3 modulates the cellular consequences of HOX gene expression to enhance differentiation block in human AML.

2018-01-15 | GSE97450 | GEO

Cooperative and antagonistic roles for Irx3 and Irx5 in cardiac morphogenesis and postnatal physiology

Project description:Analysis of the roles of Irx3 and Irx5 transcription factors in mouse heart development and postnatal heart function. Results show that show that Irx3 and Irx5 have redundant function in the in the endocardium to regulate atrioventricular canal morphogenesis and outflow tract formation. A postnatal deletion of Irx3 and Irx5 surprisingly results in a restoration of the repolarization gradient that is altered in Irx5 mutant hearts, suggesting a model whereby postnatal Irx3 activity is normally repressed by Irx5.

2012-06-20 | GSE38826 | GEO

Adiponectin-cre FTO flox/flox and FTO flox/flox mouse white fat tissues

Project description:Single nucleotide polymorphisms in intron 1 of the fat mass and obesity-associated (FTO) gene were found to be associated with an increased risk of adult obesity. Enhanced FTO expression in mice leads to hyperphagia, increased fat mass, and higher body weight. Neuronal-specific FTOâ??deleted mice have an identical lean body weight phenotype to global FTO-deleted mice. The physiological role of adipose FTO in the homeostasis of energy regulation remains to be elucidated. We used microarrays to elucidate the metabolic pathways that are regulated by FTO in the white fat. FTO flox/flox and Adiponectin-cre FTO flox/flox (AFO) mice were fed with chow diet. White fat tissues from epididymal adipose pad were harvested under ad lib condition for RNA isolation. Three independent pools of FTO flox/flox and AFO mouse white fat RNA were included in the study.

2016-07-03 | E-GEOD-65098 | biostudies-arrayexpress

Cooperative and antagonistic roles for Irx3 and Irx5 in cardiac morphogenesis and postnatal physiology

2012-06-19 | E-GEOD-38826 | biostudies-arrayexpress

The Obesity-associated Fto gene regulates activity of the dopaminergic midbrain circuitry [FTO KO]

Project description:Here we use MeRIP-Seq to analyze global adenosine methylation (m6A) in mRNAs in the midbrain and striatum of Fto-deficient mice. We find that Fto deficiency leads to increased methylation within a subset of mRNAs important for neuronal signaling, including many within the dopaminergic signaling pathway. Collectively, our results show that Fto regulates demethylation of specific mRNAs in vivo, and this activity relates to control of dopaminergic transmission. Profiling of m6A in midbrain and striatum from FTO knockout mice

2013-06-15 | E-GEOD-47216 | biostudies-arrayexpress

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