Epigenomic regulation of metabolism in muscle by circadian clock and environment
生物钟和环境对肌肉代谢的表观基因组调节
基本信息
- 批准号:9132777
- 负责人:
- 金额:$ 24.9万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-09-24 至 2017-08-31
- 项目状态:已结题
- 来源:
- 关键词:AddressAffectAmino AcidsAnimal ModelAnimalsBackBindingBiochemistryBioinformaticsBranched-Chain Amino AcidsBurn injuryCarbohydratesCatabolismChromatinCircadian RhythmsCitric Acid CycleClinicalClinical TreatmentClinical TrialsCollaborationsCore FacilityCoupledDarknessDataData SetDevelopmentDiabetes MellitusDietDietary FactorsDiseaseEconomic BurdenEnergy MetabolismEnvironmentEuglycemic ClampingExerciseFunding OpportunitiesFutureGene ExpressionGene Expression AlterationGene TargetingGenesGeneticGenetic TranscriptionGenomeGlucoseGlucose ClampGlucose IntoleranceGlycogenGlycolysisGoalsHDAC3 geneHealthHepaticHigh Fat DietHistone Deacetylase InhibitorHistonesHomeostasisInflammatoryInsulin ResistanceIsotopesKetone BodiesKetonesKnockout MiceKnowledgeLaboratoriesLeadLightLipidsLiverMalignant NeoplasmsMediatingMentorsMetabolicMetabolismMethodsMitochondriaModelingModificationMolecularMonitorMusMuscleMuscle CellsNon-Insulin-Dependent Diabetes MellitusNuclear ReceptorsObesityOutputOxygen ConsumptionPennsylvaniaPerformancePhasePhysical ExercisePhysiologyPlayPurine NucleotidesRecruitment ActivityRegulationResearchRoleRunningSignal TransductionSkeletal MuscleSocietiesSourceTestingThermogenesisTimeTissuesUniversitiesamino acid metabolismcarbohydrate metabolismcareercircadian pacemakerdata miningendurance exerciseepigenomeepigenomicsfeedingflexibilitygene environment interactiongenome-wideglucose toleranceglucose uptakeimprovedinsulin sensitivityknock-downlipid metabolismmetabolomicsmitochondrial dysfunctionmouse modelnovelpandemic diseasepreferenceresearch studyrespiratoryresponsesmall moleculetranscriptome
项目摘要
Project Summary
The current research is to study how epigenomic modifier histone deacetylase 3 (HDAC3) regulates
carbohydrates metabolism and insulin sensitivity in skeletal muscle in response to either the internal circadian
clock or the external dietary factor. I have developed a novel mouse model with HDAC3 specifically depleted in
skeletal muscle, and have found that the mice display disrupted metabolic circadian gene expression and
exacerbated glucose intolerance that is induced by high fat diet (HFD). During the mentored phase, I will gain
new expertise in genomewide epigenomic approaches that are well established in my mentor’s laboratory. I
will also gain additional knowledge in muscle physiology, metabolic flux analysis, and metabolomics methods
through collaboration with other laboratories and core facilities at University of Pennsylvania.
The research that I propose to continue in the independent phase is to study HDAC3 in exercise endurance,
fuel selection and efficiency, as well as lipid and amino acid metabolism in skeletal muscle. We have found that
mice without muscular HDAC3 have surprisingly improved exercise endurance associated with a switch in fuel
preference from carbohydrates towards lipid. I will characterize mitochondrial function and trace metabolic
fluxes through lipid, ketone bodies, and amino acids catabolism, including the anaplerotic purine nucleotide
cycle, in exercising animals as well as in isolated primary myocytes, where knockdown experiments will test
the requirement of specific HDAC3 target genes for the observed fuel selection and enhanced fuel efficiency.
My future career goal after independence is to decipher the epigenomic mechanism that underlies hormetic
response to physical exercise in skeletal muscle. Exercise is beneficial to many aspects of health, especially in
the context of obesity and diabetes. My general hypothesis is that epigenomic mechanisms underlie exercise
induced beneficial metabolic remodeling. I will comprehensively characterize exerciseinduced changes in
skeletal muscle transcriptome and epigenome using genomewide methods and metabolomics approaches.
This is the first endeavor ever, as far as I know, to analyze exerciseinduced epigenomic changes in a
genomewide scale. This unbiased method will produce comprehensive datasets, from which data mining and
motif analysis will generate new hypotheses regarding novel transcription networks that respond to exercise.
Biochemistry methods and metabolic flux analysis will then be used to validate these hypotheses, followed by
development of genetic animal models and physiology studies. Together, these approaches will generate
testable hypothesis backed up by preliminary data, which is essential for successful competition for future
funding opportunities.
项目摘要
目前的研究是研究表观基因组修饰剂组蛋白去乙酰化酶3(HDAC3)如何调节
响应内部昼夜节律的骨骼肌碳水化合物代谢和胰岛素敏感性
我已经开发了一种新的小鼠模型,HDAC3特异性耗尽,
骨骼肌,并发现小鼠显示出破坏的代谢昼夜节律基因表达,
高脂饮食(HFD)引起的葡萄糖耐受不良加剧。在指导阶段,我将获得
在我导师的实验室中已经建立的全基因组表观基因组方法的新专业知识。
还将获得肌肉生理学,代谢通量分析和代谢组学方法的额外知识
通过与宾夕法尼亚大学的其他实验室和核心设施的合作。
我建议在独立阶段继续进行的研究是研究HDAC 3在运动耐力方面的作用,
燃料选择和效率,以及骨骼肌中的脂质和氨基酸代谢。我们发现,
没有肌肉HDAC3的小鼠具有与燃料转换相关的惊人的运动耐力改善
碳水化合物对脂质的偏好。我将描述线粒体功能和微量代谢
通过脂质、酮体和氨基酸催化剂的通量,包括回补嘌呤核苷酸
循环,在运动动物以及分离的原代肌细胞中,其中敲除实验将测试
所观察到的燃料选择和提高的燃料效率需要特定的HDAC 3靶基因。
我独立后的未来职业目标是破译作为激效作用基础的表观基因组机制
运动对健康的许多方面都有好处,特别是在
肥胖和糖尿病的背景下。我的一般假设是,表观基因组机制的基础运动
诱导有益的代谢重塑。我将全面表征运动诱导的变化,
使用全基因组方法和代谢组学方法的骨骼肌转录组和表观基因组。
据我所知,这是有史以来第一奋进分析运动诱发的表观基因组变化,
这种无偏见的方法将产生全面的数据集,从中进行数据挖掘和
基序分析将产生新的假设,关于新的转录网络,响应运动。
然后将使用生物化学方法和代谢通量分析来验证这些假设,
发展遗传动物模型和生理学研究。这些方法将共同产生
由初步数据支持的可验证的假设,这对未来的成功竞争至关重要
融资机会。
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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{{ truncateString('Zheng Sun', 18)}}的其他基金
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