Molecular Regulators of Mitochondria in Diabetic Cardiomyopathy
糖尿病心肌病线粒体的分子调节因子
基本信息
- 批准号:10609824
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-01-01 至 2025-12-31
- 项目状态:未结题
- 来源:
- 关键词:BiologyCardiacCause of DeathCaveolaeCaveolinsCell membraneCell physiologyCellsCholesterolComplexCoupledCyclic AMPCyclic AMP-Dependent Protein KinasesDataDiabetes MellitusDissociationElectron TransportEpidemicExposure toFunctional disorderFundingGene TransferGenerationsHeartHeart DiseasesHomeostasisHyperglycemiaHyperinsulinismInjuryInsulin ReceptorLaboratoriesLipidsLocationMembraneMetabolicMetabolismMicroscopicMitochondriaModelingMolecularMultiprotein ComplexesMyocardial IschemiaMyocardial dysfunctionNon-Insulin-Dependent Diabetes MellitusOrganOrganellesPathologyPersonsPhosphotransferasesProcessProteinsReceptor SignalingRegulationReperfusion InjuryRoleSLC2A1 geneSignal TransductionSignaling MoleculeSiteSphingolipidsStressStructural ProteinStructureSystemTestingTherapeuticcaveolin-3diabeticdiabetic cardiomyopathydiabetic patientfatty acid metabolismflaskshealingheart functionin vivo Modelinsightinsulin signalingnew therapeutic targetnoveloverexpressionpre-clinicalreceptorrepairedresponsescaffold
项目摘要
Diabetes is at epidemic proportions, with 300 million people worldwide projected to have diabetes by 2025.
Heart disease is the cause of death in 80% of diabetic patients. Heart disease related to diabetes is triggered
by alteration in fatty acid metabolism, hyperinsulinemia, and hyperglycemia and involves complex changes in
signaling and metabolism that may be regulated at multiple levels: 1) altered membrane ultrastructure and
signaling;; 2) altered mitochondrial function and dynamics. As such, the mitochondria and membrane could
be defined as integrative control points in the heart to adapt to diabetic stress and offer novel therapeutic
targets. A metabolic, molecular regulator that integrates membrane and mitochondrial signaling has not been
identified.
Over the last 7 years of funding, this VA Merit proposal has studied caveolin biology in the setting of diabetes,
and then kinase regulation in the setting of ischemia-reperfusion injury. Building upon our findings, this renewal
will merge these two ideas to propose a novel metabolic, molecular regulator of cardiac function critical to
diabetic cardiomyopathy. Signaling molecules exist as dynamic, spatially organized multi-protein complexes in
lipid-rich microdomains of the plasma membrane continuously forming and dissociating under basal or
stimulated conditions. Caveolae are cholesterol and sphingolipid-enriched structures that form microscopically
distinct flask-like invaginations of the plasma membrane. Our laboratory and others have shown that the
caveolar structural proteins, caveolins, act as scaffolding molecules to aid in localization and regulation of
receptors and signaling molecules to facilitate coordinated, precise, and rapid regulation of cell function.
Recent evidence suggests that caveolins may exist outside of caveolae and may regulate signaling and
membrane dynamics in distinct organelles. Little information exists regarding protein kinase A (PKA)
localization and functionality in caveolae. Preliminary data suggest that caveolae regulate cellular cAMP. PKA
signaling components are also localized to subcellular compartment where Cav-3 localizes to and are enriched
in subsarcolemmal mitochondria though little is known in the setting of diabetes. We hypothesize that,
caveolin and PKA may, therefore, be a novel dyad integrating membrane and mitochondria signaling to
maintain cellular and physiological homeostasis in the diabetic heart. The following specific hypotheses
and aims are proposed:
Aim 1: We hypothesize that mitochondria degrade when exposed to diabetic insults and that mitochondrial
localized Cav-3/PKA will sense cardiac metabolic load, tightly couple electron transport, limit generation of
varied reactive species, and maintain mitochondrial structure and function. To test this hypothesis, we will
determine the role of Cav-3/PKA in mitochondrial function and structure and the therapeutic potential of
mitochondrial-targeted gene transfer in the progression of diabetes-induced cardiac dysfunction.
Aim 2: We hypothesize that plasma membranes degrade with diabetic insults, are less capable of healing and
maintaining coupled insulin receptor signaling, and that membrane-localized Cav-3/PKA will regulate these
processes to maintain normal membrane integrity. To test this hypothesis, we will determine the role of Cav-
3/PKA in membrane repair and signaling.
糖尿病已成为流行病,预计到2025年全球将有3亿人患有糖尿病。
项目成果
期刊论文数量(36)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Deletion of caveolin scaffolding domain alters cancer cell migration
- DOI:10.1080/15384101.2019.1618118
- 发表时间:2019-05-23
- 期刊:
- 影响因子:4.3
- 作者:Okada, Sunaho;Raja, Sadaf A.;Patel, Hemal H.
- 通讯作者:Patel, Hemal H.
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Hemal H Patel其他文献
PTPMT1 Is Required for Embryonic Cardiac Cardiolipin Biosynthesis to Regulate Mitochondrial Morphogenesis and Heart Development
- DOI:
doi: 10.1161/CIRCULATIONAHA.121.054768. - 发表时间:
2021 - 期刊:
- 影响因子:
- 作者:
Ze'e Chen;Siting Zhu;Hong Wang;Li Wang;Jianlin Zhang;Yusu Gu;Changming Tan;Mehul Dhanani;Eric Wever;Xinru Wang;Boyu Xie;Shijia Wang;Lei Huang;Antoine H C van Kampen;Jie Liu;Zhen Han;Hemal H Patel;Frédéric M Vaz;Xi Fang;Ju Chen;Kunfu Ouyang - 通讯作者:
Kunfu Ouyang
E-cigarette-induced changes in cell stress and mitochondrial function
电子烟引起的细胞应激和线粒体功能变化
- DOI:
10.1016/j.freeradbiomed.2025.01.004 - 发表时间:
2025-02-16 - 期刊:
- 影响因子:8.200
- 作者:
Ramamurthy Chitteti;Juan Pablo Zuniga-Hertz;Jorge A. Masso-Silva;John Shin;Ingrid Niesman;Christine M. Bojanowski;Avnee J. Kumar;Mark Hepokoski;Laura E Crotty Alexander;Hemal H Patel;David M Roth - 通讯作者:
David M Roth
Hemal H Patel的其他文献
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{{ truncateString('Hemal H Patel', 18)}}的其他基金
Molecular Regulators of Mitochondria in Diabetic Cardiomyopathy
糖尿病心肌病线粒体的分子调节因子
- 批准号:
10366408 - 财政年份:2022
- 资助金额:
-- - 项目类别:
BLR&D Merit Review Research Career Scientist Award Application
BLR
- 批准号:
10618233 - 财政年份:2020
- 资助金额:
-- - 项目类别:
BLR&D Merit Review Research Career Scientist Award Application
BLR
- 批准号:
10454104 - 财政年份:2020
- 资助金额:
-- - 项目类别:
ShEEP Request for Scintica Flow Velocity and Oxygen System
ShEEP 请求 Scintica 流速和氧气系统
- 批准号:
9794630 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Interdisciplinary Anesthesiology Research Training Program
跨学科麻醉学研究培训计划
- 批准号:
10555968 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Interdisciplinary Anesthesiology Research Training Program
跨学科麻醉学研究培训计划
- 批准号:
9209650 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Interdisciplinary Anesthesiology Research Training Program
跨学科麻醉学研究培训计划
- 批准号:
10393994 - 财政年份:2017
- 资助金额:
-- - 项目类别:
AKIP1 regulation of PKA and NF-KB in the heart
AKIP1 对心脏中 PKA 和 NF-KB 的调节
- 批准号:
9898261 - 财政年份:2013
- 资助金额:
-- - 项目类别:
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