Activation of C/EBP-β by mitohormesis as a therapy for obesity

通过线粒体毒物兴奋作用激活 C/EBP-β 作为肥胖疗法

• 批准号: 10551885
• 负责人: Alessandro Bitto
• 金额: $ 14.68万
• 依托单位: UNIVERSITY OF WASHINGTON
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10551885
• 关键词: Adipocytes; Adipose tissue; Adult; Aging; Animals; Antioxidants; Architecture; Attenuated; Big Data; Biochemical Pathway; Biological Aging; Biology; Biology of Aging; Body Weight decreased; CCAAT-Enhancer-Binding Proteins; Caloric Restriction; Cardiovascular Diseases; Catabolism; Chronic Disease; DNA polymerase gamma; Data; Data Analyses; Developed Countries; Diabetes Mellitus; Diet; Endocrine; Energy Metabolism; FDA approved; FRAP1 gene; Fatty acid glycerol esters; Gene Expression; Genes; Genetic; Geroscience; Glucose tolerance test; Health; Hepatic; Homeostasis; Hyperglycemia; In Vitro; Indirect Calorimetry; Institution; Insulin Resistance; Intervention; Knock-in; Knock-out; Liver; Longevity; MAP Kinase Gene; Malignant Neoplasms; Measures; Mediating; Metabolic; Metabolic Diseases; Metabolic dysfunction; Metabolic syndrome; Mitochondria; Mitochondrial DNA; Modeling; Morbid Obesity; Mus; Neurologic; Non-Insulin-Dependent Diabetes Mellitus; Nutrient; Obese Mice; Obesity; Pathogenesis; Pathology; Pathway interactions; Pharmaceutical Preparations; Phosphorylation; Population; Process; Property; Protein Isoforms; Proteins; Reactive Oxygen Species; Research; Reverse Transcriptase Inhibitors; Risk; Risk Factors; Rodent; Role; Stress; Techniques; Testing; Tissues; Training; Transgenic Model; Translations; United States; Viral; Weight; adefovir dipivoxil; analytical tool; biological adaptation to stress; blood glucose regulation; constitutive expression; diet-induced obesity; energy balance; experimental study; factor C; fatty acid metabolism; fatty acid oxidation; glucose metabolism; in vivo; insight; insulin tolerance; lipid biosynthesis; lipid metabolism; liver metabolism; metabolic phenotype; mitochondrial dysfunction; mouse model; novel; novel strategies; nucleoside analog; nutrient metabolism; obese person; obesity prevention; obesity treatment; obesogenic; p38 Mitogen Activated Protein Kinase; pharmacologic; prevent; programs; protein expression; response; side effect; stress activated protein kinase; stressor; tissue culture; transcription factor

Project Summary It is estimated that around 40% of the adult population of the United States is obese and thus at increased risk for several chronic illnesses. Current weight loss strategies for obese people are often ineffective and come with serious neurological side effects. This proposal aims to determine whether new strategies to treat and prevent obesity can be developed from current insights into biological aging. The transcription factor C/EBP-β regulates the expression of genes involved in fat catabolism and fat stores mobilization. Preliminary observations suggest that pro-longevity interventions, such as mTORC1 inhibition, prevent diet-induced obesity in mice and activate C/EBP-β. The nucleoside-analogue reverse-transcriptase inhibitor (NRTI) adefovir dipivoxil (ADV) also prevents diet-induced obesity and activates C/EBP-β, though independently of mTORC1 inhibition. Building on these premises, Aim 1 tests the hypothesis that activation of hepatic C/EBP-β leads to increased energy expenditure and fat catabolism, with net negative effects on weight and fat stores. Using transgenics and pharmacological approaches, we will determine the role of hepatic C/EBP-β in lipid metabolism and homeostasis in the face of obesogenic challenges and morbid obesity. State-of-the-art techniques will be applied to measure the impact of different isoforms of C/EBP-β on energy balance, glucose homeostasis, and endocrine regulation of glucose and lipid metabolism. Aim 2 sets out to determine whether mitohormetic stresses can increase lipid metabolism through activation of C/EBP-β. Using ADV and other mitochondrial stressors, we will measure activation of mitohormetic pathways and their connection with increased hepatic oxidation of fatty acids and energy expenditure. This proposal will be carried out in an institution with strong research programs in both aging and obesity/diabetes biology. The candidate will receive state of the art training in techniques and analytical tools necessary to the completion of both aims, including indirect calorimetry, insulin and glucose tolerance testing, and big data analysis. The candidate will also acquire an in-depth background in energy and nutrient homeostasis. Altogether, the experiments and training proposed will allow the candidate to build an independent and successful research program applying insights from geroscience to understand and investigate nutrient homeostasis, energy balance, and related metabolic disorders.

项目摘要 据估计，美国大约40%的成年人口患有肥胖症，因此面临更大的风险 治疗几种慢性病。目前针对肥胖者的减肥策略往往是无效的， 有严重的神经副作用。这项提案旨在确定新的治疗和治疗策略 预防肥胖可以从目前对生物衰老的见解中发展出来。 转录因子C/eBP-β调控脂肪分解代谢和脂肪储存相关基因的表达 动员。初步观察表明，促进长寿的干预措施，如抑制mTORC1， 预防饮食诱导的小鼠肥胖，并激活C/eBP-β。核苷类似物逆转录酶 然而，抑制剂阿德福韦酯(ADV)也可以预防饮食诱导的肥胖并激活C/EBP-β 与mTORC1抑制无关。 在这些前提的基础上，Aim 1测试了肝脏C/EBP-β激活导致 能量消耗和脂肪分解代谢，对体重和脂肪储存有净负面影响。使用转基因技术 和药理学方法，我们将确定肝脏C/EBP-β在脂质代谢和 面对肥胖挑战和病态肥胖时的动态平衡。最先进的技术将是 用于测量不同亚型的C/EBP-β对能量平衡、葡萄糖稳态和 糖脂代谢的内分泌调节。 目标2旨在确定丝裂原应激是否可以通过激活 C/eBP-β。使用ADV和其他线粒体应激源，我们将测量有丝分裂途径的激活 以及它们与肝脏脂肪酸氧化增加和能量消耗的关系。 这项提议将在一个在老龄化和老龄化方面都有强大研究计划的机构中实施 肥胖/糖尿病生物学。应聘者将接受最先进的技术和分析工具培训 完成这两个目标所必需的，包括间接量热法、胰岛素和葡萄糖耐量试验， 和大数据分析。候选人还将获得能源和营养方面的深入背景。 动态平衡。总之，拟议的实验和培训将使候选人能够建立一个 独立和成功的研究项目，应用老年科学的见解来理解和 研究营养动态平衡、能量平衡和相关的代谢紊乱。