Mitochondrial Dysfunction and Adipose Insulin Resistance
线粒体功能障碍和脂肪胰岛素抵抗
基本信息
- 批准号:8531229
- 负责人:
- 金额:$ 29.98万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2010
- 资助国家:美国
- 起止时间:2010-08-01 至 2015-07-31
- 项目状态:已结题
- 来源:
- 关键词:AdipocytesAdipose tissueAnimal ModelAnimalsAntioxidantsBiologyCardiovascular DiseasesCell Culture TechniquesComplexDevelopmentDietDiseaseDisease modelDown-RegulationElectron TransportEnzymesEtiologyEventFatty acid glycerol estersGenetic DeterminismGenomicsGlutathione S-TransferaseHormonalHumanHuman BiologyHydrogen PeroxideHydroxyl RadicalHypertensionIndividualInsulinInsulin ResistanceLaboratoriesLaboratory StudyLeadLinkLipidsMAPK14 geneMetabolicMetabolic DiseasesMetabolismMinnesotaMitochondriaMitochondrial ProteinsModelingModificationMolecularN-terminalNon-Insulin-Dependent Diabetes MellitusObesityOxidative PhosphorylationOxidative StressPathway interactionsPhosphotransferasesProcessProductionProteinsProteomicsReactive Oxygen SpeciesReportingRisk FactorsRoleSignal TransductionStagingSumSuperoxidesSystemSystems BiologyTechnologyTestingThioredoxinThioredoxin-2Transgenic MiceTumor Necrosis Factor-alphaUniversitiesWorkcombatgain of functioninsightinsulin sensitivityjun Oncogenemetabolomicsmitochondrial dysfunctionnoveloxidationpublic health relevance
项目摘要
DESCRIPTION (provided by applicant): A variety of animal, cell culture and molecular studies have correlated increased oxidative stress and the accumulation of reactive oxygen species (ROS) such as superoxide anion and hydroxyl radicals to type 2 diabetes. While appreciated for years, it was unclear if oxidative stress / ROS was a casual or causal factor in the etiology of the disease. However, more recent work utilizing a variety of loss and gain of function analyses have indicated that oxidative stress is causally linked to insulin resistance but that the molecular mechanisms remain obscure. This application will profile new and compelling findings from our laboratories using animal and cell culture models that establish a molecular linkage between the antioxidant defense system in adipose cells with mitochondrial function, oxidative phosphorylation, signal transduction and the development of insulin resistance. We present a novel hypothesis supported by preliminary studies from genomic, proteomic, metabolomic and molecular analyses that point toward the covalent modification of mitochondrial proteins with bioactive lipids and the oxidation of mitochondrial thioredoxin as central to the process. Initiating this oxidative stress challenge are new findings that describe the tumor necrosis factor 1 (TNF1) dependent down regulation of glutathione S-transferase A4 setting the stage for a molecular cascade of events that activates the c-JUN NH2-terminal kinase (JNK), an established regulator of insulin sensitivity. Moreover, we present new findings that demonstrate that the down regulation of GSTA4 is not merely a process observed in animal models of insulin resistance but also occurs selectively in obese, insulin resistant, but not obese, insulin sensitive humans thereby providing a molecular differentiation between obesity and insulin resistance. This application builds on recent evidence obtained in the Bernlohr, Griffin and Arriaga laboratories that functionally links oxidative stress to insulin resistance. These studies in sum lead to our central hypothesis: decreased expression of GSTA4 in adipocytes leads to increased carbonylation of multiple protein targets. Carbonylation in turn initiates a cascade of molecular events leading to mitochondrial dysfunction and ROS production. ROS production leads to the oxidation of Thioredoxin 2 (Trx2) and the activation of Trx2-ASK1-JNK/p38 signaling system contributing to insulin resistance. To test this hypothesis, the following four specific aims are proposed: Specific Aim 1. Evaluate mitochondrial protein carbonylation and identify target proteins. Specific Aim 2. Assess ROS production and mitochondrial electron transport system in cell culture and animal models. Specific Aim 3. Develop and characterize aP2-HA-GSTA4 transgenic mice maintained on low and high fat diets. Specific Aim 4. Characterize cellular metabolism and the Trx2-ASK1-JNK pathway in animal and cell culture models.
PUBLIC HEALTH RELEVANCE: A variety of animal, cell culture and molecular studies have correlated increased oxidative stress and the accumulation of reactive oxygen species (ROS) to type 2 diabetes. While appreciated for years, it was unclear if oxidative stress / ROS was a casual or causal factor in the etiology of the disease. This application will profile new and compelling findings from our laboratories using animal and cell culture models that establish a molecular linkage between the antioxidant defense system in adipose cells with mitochondrial function, oxidative phosphorylation, signal transduction and the development of insulin resistance. We present new findings that demonstrate that the down regulation of GSTA4 is not merely a process observed in animal models of insulin resistance but also occurs selectively in obese, insulin resistant, but not obese, insulin sensitive humans thereby providing a molecular differentiation between obesity and insulin resistance. If the hypothesis is proven to be correct, the study would be immediately translatable to human biology and afford a new view of how type 2 diabetes may be combated.
描述(由申请人提供):各种动物、细胞培养和分子研究表明,氧化应激增加和活性氧(ROS)(如超氧阴离子和羟基自由基)的积累与2型糖尿病有关。虽然多年来一直受到重视,但尚不清楚氧化应激/ ROS在该疾病的病因学中是偶然因素还是因果因素。然而,最近利用各种功能损失和增益分析的工作表明,氧化应激与胰岛素抵抗有因果关系,但其分子机制仍不清楚。该应用程序将描述我们实验室使用动物和细胞培养模型的新的令人信服的发现,这些模型建立了脂肪细胞中具有线粒体功能的抗氧化防御系统,氧化磷酸化,信号转导和胰岛素抵抗发展之间的分子联系。在基因组学、蛋白质组学、代谢组学和分子分析的初步研究支持下,我们提出了一个新的假设,指出线粒体蛋白与生物活性脂质的共价修饰和线粒体硫氧还蛋白的氧化是这一过程的核心。引发这种氧化应激挑战的新发现描述了肿瘤坏死因子1 (TNF1)依赖于谷胱甘肽s -转移酶A4的下调,为激活c-JUN nh2末端激酶(JNK)的分子级联事件奠定了基础,JNK是胰岛素敏感性的既定调节剂。此外,我们提出的新发现表明,GSTA4的下调不仅是在胰岛素抵抗动物模型中观察到的一个过程,而且还选择性地发生在肥胖,胰岛素抵抗,而不是肥胖,胰岛素敏感的人身上,从而提供了肥胖和胰岛素抵抗之间的分子分化。这一应用建立在Bernlohr, Griffin和Arriaga实验室最近获得的证据的基础上,这些证据在功能上将氧化应激与胰岛素抵抗联系起来。总的来说,这些研究得出了我们的中心假设:脂肪细胞中GSTA4的表达减少导致多个蛋白靶的羰基化增加。羰基化反过来引发一系列分子事件,导致线粒体功能障碍和ROS的产生。ROS的产生导致硫氧还蛋白2 (Trx2)的氧化和Trx2- ask1 - jnk /p38信号系统的激活,从而导致胰岛素抵抗。为了验证这一假设,提出了以下四个具体目标:评估线粒体蛋白羰基化并鉴定靶蛋白。具体目标2。在细胞培养和动物模型中评估ROS的产生和线粒体电子传递系统。具体目标3。培养和鉴定aP2-HA-GSTA4转基因小鼠,维持低脂和高脂饮食。具体目标在动物和细胞培养模型中表征细胞代谢和Trx2-ASK1-JNK通路。
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)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
David A Bernlohr其他文献
28 - Mitochondrial Dysfunction and Fragmentation Induced by Inflammation and Oxidative Stress Is Prevented b y SERCA2 Activation in Adipocytes
- DOI:
10.1016/j.freeradbiomed.2015.10.065 - 发表时间:
2015-10-01 - 期刊:
- 影响因子:
- 作者:
Rocio Foncea;Jovan Kuzmicic;David D Thomas;David A Bernlohr - 通讯作者:
David A Bernlohr
David A Bernlohr的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('David A Bernlohr', 18)}}的其他基金
Midwest Murine-Tissue Mapping Center (MM-TMC)
中西部鼠组织绘图中心 (MM-TMC)
- 批准号:
10552986 - 财政年份:2022
- 资助金额:
$ 29.98万 - 项目类别:
Midwest Murine-Tissue Mapping Center (MM-TMC)
中西部鼠组织绘图中心 (MM-TMC)
- 批准号:
10675007 - 财政年份:2022
- 资助金额:
$ 29.98万 - 项目类别:
Mitochondrial Dysfunction and Adipose Insulin Resistance
线粒体功能障碍和脂肪胰岛素抵抗
- 批准号:
7893525 - 财政年份:2010
- 资助金额:
$ 29.98万 - 项目类别:
相似海外基金
Deciphering the role of adipose tissue in common metabolic disease via adipose tissue proteomics
通过脂肪组织蛋白质组学解读脂肪组织在常见代谢疾病中的作用
- 批准号:
MR/Y013891/1 - 财政年份:2024
- 资助金额:
$ 29.98万 - 项目类别:
Research Grant
ESTABLISHING THE ROLE OF ADIPOSE TISSUE INFLAMMATION IN THE REGULATION OF MUSCLE MASS IN OLDER PEOPLE
确定脂肪组织炎症在老年人肌肉质量调节中的作用
- 批准号:
BB/Y006542/1 - 财政年份:2024
- 资助金额:
$ 29.98万 - 项目类别:
Research Grant
Activation of human brown adipose tissue using food ingredients that enhance the bioavailability of nitric oxide
使用增强一氧化氮生物利用度的食品成分激活人体棕色脂肪组织
- 批准号:
23H03323 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of new lung regeneration therapies by elucidating the lung regeneration mechanism of adipose tissue-derived stem cells
通过阐明脂肪组织干细胞的肺再生机制开发新的肺再生疗法
- 批准号:
23K08293 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Canadian Alliance of Healthy Hearts and Minds: Dissecting the Pathways Linking Ectopic Adipose Tissue to Cognitive Dysfunction
加拿大健康心灵联盟:剖析异位脂肪组织与认知功能障碍之间的联系途径
- 批准号:
479570 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Operating Grants
Determinants of Longitudinal Progression of Adipose Tissue Inflammation in Individuals at High-Risk for Type 2 Diabetes: Novel Insights from Metabolomic Profiling
2 型糖尿病高危个体脂肪组织炎症纵向进展的决定因素:代谢组学分析的新见解
- 批准号:
488898 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Operating Grants
A study on the role of brown adipose tissue in the development and maintenance of skeletal muscles
棕色脂肪组织在骨骼肌发育和维持中作用的研究
- 批准号:
23K19922 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Grant-in-Aid for Research Activity Start-up
A mechanism of lipid accumulation in brown adipose tissue
棕色脂肪组织中脂质积累的机制
- 批准号:
10605981 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Obesity and Childhood Asthma: The Role of Adipose Tissue
肥胖和儿童哮喘:脂肪组织的作用
- 批准号:
10813753 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别:
Estrogen Signaling in the Ventromedial Hypothalamus Modulates Adipose Tissue Metabolic Adaptation
下丘脑腹内侧区的雌激素信号调节脂肪组织代谢适应
- 批准号:
10604611 - 财政年份:2023
- 资助金额:
$ 29.98万 - 项目类别: