An anti-diabetic microRNA that promotes metabolically healthy obesity
一种抗糖尿病 microRNA,可促进代谢健康的肥胖
基本信息
- 批准号:9367450
- 负责人:
- 金额:$ 39.63万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-08-18 至 2022-05-31
- 项目状态:已结题
- 来源:
- 关键词:AdipocytesAdipose tissueAdultAffectBinding SitesBody WeightCellsChildChronicClinicalClinical ManagementComorbidityCoupledDataDefectDepositionDiabetic mouseDietDietary intakeEnergy MetabolismExhibitsFatty LiverFatty acid glycerol estersFeedbackFunctional disorderGenesGeneticGenetic TranscriptionGlucoseGoalsHealthHigh Fat DietHomeostasisHumanImpairmentIncidenceIndividualInflammationInflammatoryInsulinInsulin ResistanceInterferon-alphaIntra-abdominalInvestigationLeadLinkLipidsLiverMeasuresMediatingMetabolicMetabolic DiseasesMicroRNAsMolecularNon-Insulin-Dependent Diabetes MellitusObese MiceObesityPathway interactionsPeripheralPhysiologicalRefractoryRepressionResearchRiskRoleSTAT1 geneSignal TransductionStressTestingTherapeutic InterventionTissue ExpansionTissuesTranscriptional RegulationTransducersTransgenic OrganismsUnited StatesUntranslated RNAVisceralbasecell typechromatin immunoprecipitationcohortcytokinediabeticdietary excessexperimental studyfatty acid oxidationimprovedinsulin sensitivitymouse modelnovelobesity managementpressurepreventprogramspublic health relevancesubcutaneoustranscription factor
项目摘要
ABSTRACT
Chronic dietary energy stress on white adipose tissue (WAT) promotes fat deposition in peripheral tissues,
which accelerates insulin resistance and type 2 diabetes mellitus (T2DM). Restoring the capacity of WAT to
safely sequester excess energy promotes insulin sensitivity in the face of diet-induced obesity. To this end, we
discovered that the microRNA miR-30a exhibits reduced expression in subcutaneous fat from diabetic mice
and humans compared to normal controls. Our preliminary studies establish that miR-30a confers upon WAT
the ability to withstand the pressure of high fat diet and prevent the co-morbidities of obesity. These changes
result in improved whole-body insulin sensitivity coupled with muted WAT inflammation and reduced hepatic
steatosis. The effect of miR-30a on WAT function coincides with complete blockade of STAT1 signaling, which
is a key transducer of obesity-linked inflammatory cytokines. These exciting studies support the hypothesis
that systemic insulin sensitivity is preserved by miR-30a repression of STAT1-mediated inflammation in
adipocytes. Intriguingly, miR-30a confers beneficial effects on glucose and lipid homeostasis without reducing
body weight. The goal of this proposal is to critically test our hypothesis by challenging our genetic mouse
models of miR-30a and STAT1 expression with diet-induced obesity. In Aim 1, we will define the basis
underpinning the metabolic effects of miR-30a transgenic expression in WAT. Aim 2 will evaluate the role of
the inflammatory transcription factor STAT1 in mediating the metabolic effects of miR-30a expression in
subcutaneous WAT. Lastly, Aim 3 will establish the mechanisms governing the transcriptional regulation of
miR-30a. Our investigation of the basis by which miR-30a controls WAT function is significant because it will
expand our understanding of mechanisms that connect obesity with T2DM. At the completion of our studies,
we will have identified mechanisms that might be exploited in therapies to manage insulin resistance and
T2DM. PUBLIC HEALTH RELEVANCE: Insulin resistance and T2DM are chronic health problems in the
United States. Mechanisms that improve insulin sensitivity by restoring proper fat storage mechanisms
represent new paradigms for clinical management of obesity.
摘要
对白色脂肪组织(WAT)的慢性膳食能量应激促进外周组织中的脂肪沉积,
其加速胰岛素抵抗和2型糖尿病(T2 DM)。 恢复WAT的能力,
安全地隔离多余的能量,促进胰岛素敏感性,面对饮食失调引起的肥胖。为此,我们
发现microRNAmiR-miR 30 a在糖尿病小鼠皮下脂肪中的表达减少
我们的初步研究表明,miR-130 a可使WAT发生改变,
承受高脂肪饮食压力和预防肥胖并发症的能力。这些变化
导致改善全身胰岛素敏感性,同时减轻WAT炎症,
miR-130 a对WAT功能的作用与STAT 1信号传导的完全阻断一致,
是肥胖症相关炎症细胞因子的关键转换器。 这些令人兴奋的研究支持了
全身胰岛素敏感性通过miR-130 a抑制STAT 1-β介导的炎症而得以保持,
有趣的是,miR-130 a对葡萄糖和脂质稳态具有有益的作用,而不降低脂肪细胞的生长。
这个提议的目的是通过挑战我们的遗传小鼠来严格检验我们的假设。
miR-130 a和STAT 1表达与饮食诱导肥胖的模型。 在目标1中,我们将定义基础
支持miR-130 a转基因表达在WAT中的代谢效应。目的2将评估miR-130 a在WAT中的作用。
炎症转录因子STAT 1介导miR-30 a表达的代谢效应,
皮下WAT。 最后,目标3将建立控制转录调控的机制,
我们对miR-130 a控制WAT功能的基础的研究是重要的,因为它将
扩大我们对肥胖与T2 DM联系机制的理解。在我们的研究完成时,
我们将确定可能用于治疗胰岛素抵抗的机制,
2型糖尿病。 公共卫生相关性:胰岛素抵抗和2型糖尿病是慢性健康问题,
美国的 通过恢复适当的脂肪储存机制来改善胰岛素敏感性的机制
代表了肥胖症临床管理的新范例。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Sean Hartig其他文献
Sean Hartig的其他文献
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{{ truncateString('Sean Hartig', 18)}}的其他基金
METABOLIC IMPACTS OF TYPE II INTERFERON SIGNALS IN OBESITY
II 型干扰素信号对肥胖的代谢影响
- 批准号:
10775353 - 财政年份:2023
- 资助金额:
$ 39.63万 - 项目类别:
Metabolic Impacts of Type II Interferon Signals in Obesity
II 型干扰素信号对肥胖的代谢影响
- 批准号:
10665744 - 财政年份:2017
- 资助金额:
$ 39.63万 - 项目类别:
An anti-diabetic microRNA that promotes metabolically healthy obesity
一种抗糖尿病的 microRNA,可促进代谢健康的肥胖
- 批准号:
10163161 - 财政年份:2017
- 资助金额:
$ 39.63万 - 项目类别:
Metabolic Impacts of Type II Interferon Signals in Obesity
II 型干扰素信号对肥胖的代谢影响
- 批准号:
10900013 - 财政年份:2017
- 资助金额:
$ 39.63万 - 项目类别:
Regulation of SYSTEMIC INSULIN SENSITIVITY by miRNA-30a
miRNA-30a 对全身胰岛素敏感性的调节
- 批准号:
9111200 - 财政年份:2016
- 资助金额:
$ 39.63万 - 项目类别:
Regulation of SYSTEMIC INSULIN SENSITIVITY by miRNA-30a
miRNA-30a 对全身胰岛素敏感性的调节
- 批准号:
9217647 - 财政年份:2016
- 资助金额:
$ 39.63万 - 项目类别:
Unique Roles of p160 Coactivators during Human Adipogenesis
p160 共激活剂在人类脂肪形成过程中的独特作用
- 批准号:
7804266 - 财政年份:2009
- 资助金额:
$ 39.63万 - 项目类别:
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