Molecular mechanism and physiological function of mitochondrial calcium regulation

线粒体钙调节的分子机制及生理功能

基本信息

批准号：
9370196
负责人：
Julia Chang Liu
金额：
$ 24.9万
依托单位：
UNIVERSITY OF MINNESOTA
依托单位国家：
美国
项目类别：
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-01 至 2023-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9370196
关键词：
Academia Academia Address Address Advisory Committees Advisory Committees Aging Aging Alleles Alleles Alzheimer&apos s disease model Alzheimer&apos s disease model Animal Model Animal Model Animals Animals Architecture Architecture Ataxia Ataxia Award Award Biochemical Genetics Biochemical Genetics Bioenergetics Bioenergetics Bioinformatics Bioinformatics Biology Biology Calcium Calcium Cell Death Cell Death Cell Line Cell Line Cell physiology Cell physiology Cells Cells Clinical Clinical Collaborations Collaborations Communication Communication Complex Complex Computer Analysis Computer Analysis Core Facility Core Facility Cultured Cells Cultured Cells Data Data Defect Defect Development Plans Development Plans Disease Disease Disease Progression Disease Progression Embryonic Development Embryonic Development Ensure Ensure Environment Environment Exhibits Exhibits Expression Profiling Fellowship Fellowship Gatekeeping Gatekeeping Gene Expression Gene Expression Generations Generations Genes Genes Genetic Genetic Goals Goals Grant Grant Homeostasis Homeostasis Human Human In Vitro In Vitro Job Application Job Application Knock-out Knock-out Lead Lead Learning Learning Longevity Longevity Mass Spectrum Analysis Mass Spectrum Analysis Mediating Mediating Mediation Mediation Membrane Proteins Membrane Proteins Memory Memory Mentors Mentors Mentorship Mentorship Metabolism Metabolism Methods Methods Mitochondria Mitochondria Modeling Modeling Molecular Molecular Molecular Profiling Morphology Morphology Multiprotein Complexes Multiprotein Complexes Mus Mus Muscle Muscle Muscle Weakness Muscle Weakness Muscular Dystrophies Muscular Dystrophies Mutation Mutation Myopathy Myopathy National Heart, Lung, and Blood Institute National Heart, Lung, and Blood Institute Neurodegenerative Disorders Neurodegenerative Disorders Neurologic Dysfunctions Neurologic Dysfunctions Oral Oral Pathology Pathology Patients Patients Perinatal mortality demographics Perinatal mortality demographics Phenotype Phenotype Physiological Physiological Physiology Physiology Play Play Positioning Attribute Positioning Attribute Precipitation Precipitation Production Production Professional Competence Professional Competence Proteins Proteins Proteomics Proteomics Publications Publications Reagent Reagent Regulation Regulation Reperfusion Injury Reperfusion Injury Reporting Reporting Research Research Rest Rest Role Role Scientist Scientist Secure Secure Signal Pathway Signal Pathway Signal Transduction Signal Transduction Stress Stress Symptoms Symptoms Techniques Techniques Testing Testing Therapeutic Therapeutic Tissues Tissues Training Training Work Work age related age related aged aged calcium uniporter calcium uniporter career development career development design design experience experience gel electrophoresis gel electrophoresis genetic approach genetic approach in vivo in vivo knock-down knock-down loss of function loss of function mitochondrial permeability transition pore mitochondrial permeability transition pore mouse model mouse model muscle strength muscle strength mutant mutant nervous system disorder nervous system disorder normal aging normal aging novel novel reconstitution reconstitution scaffold scaffold skills skills stem cell homeostasis stem cells symptomatic improvement symptomatic improvement tenure track tenure track transcriptome transcriptome sequencing transcriptome sequencing uptake uptake

项目摘要

Project Summary/Abstract The candidate for this award seeks further mentored research experience while developing career skills to facilitate a successful transition to research independence. Therefore, she has proposed additional experimental and professional training during her postdoctoral fellowship in the lab of Dr. Toren Finkel at the NHLBI. She will take advantage of the outstanding scientific environment in her mentor's lab and at the NHLBI to learn new techniques, including proteomics, RNA sequencing, bioinformatics and computational analysis, and animal work including advanced phenotyping tests. To train her in these methods and assist her in her research aims, she has established collaborations with Dr. Elizabeth Murphy's lab and several NHLBI core facilities. Furthermore, the candidate has designed a career development plan to ensure she prepares thoroughly for an academic position by cultivating her oral and written communication, mentorship, and lab management skills. The candidate has assembled an advisory committee consisting of her primary mentor and several other scientists who not only have extensive scientific experience in fields related to the mitochondrial biology proposed in this grant, but also have committed to guiding her on presentations, job applications, and negotiation strategies. This training will help the candidate secure a tenure-track position in academia. The research goal of this proposal is to dissect the molecular mechanism and physiological role of mitochondrial calcium regulation. Mitochondrial uptake of calcium can help to stimulate ATP production, but too much calcium can lead to opening of the mitochondrial permeability transition pore, triggering cell death. The selective channel through which calcium can rapidly enter the mitochondria, the mitochondrial calcium uniporter, is a multi-protein complex whose components are beginning to be identified. EMRE and MICU1 are two of these proteins that in cell lines have been shown to play critical roles in regulation of calcium uptake. The candidate has generated the first mouse models of EMRE and MICU1 deletion to elucidate the in vivo role of mitochondrial calcium. Her recent publication showed that MICU1 deletion leads to mitochondrial calcium overload, leading to drastically decreased survival and other defects. She will next characterize the effect of EMRE deletion on the molecular architecture of the uniporter as well as on organismal physiology (Aim 1). Her preliminary data suggest that without EMRE, mitochondria cannot uptake calcium. Therefore, the candidate will use MICU1 and EMRE deletion as genetic reagents representing “gain” and “loss” of function in terms of mitochondrial calcium uptake to elucidate how mitochondrial calcium regulation alters in vivo physiological function in global gene expression, aging, and disease (Aim 2). A number of muscular and neurodegenerative diseases have long been associated with mitochondrial calcium overload, but the generation of these mouse models will enable the first direct tests of the impact of mitochondrial calcium on organismal physiology. The completion of these aims thus is of both basic and clinical importance.

项目摘要/摘要该奖项的候选人寻求进一步的研究经验，同时发展职业技能促进成功研究独立性的过渡。因此，她提出了其他她在托伦·芬克尔博士实验室的博士后奖学金期间的实验和专业培训 NHLBI。她将利用精神实验室和NHLBI的杰出科学环境要学习新技术，包括蛋白质组学，RNA测序，生物信息学和计算分析，和动物工作，包括先进的表型测试。用这些方法训练她并协助她研究目的，她与伊丽莎白·墨菲（Elizabeth Murphy）博士和几个NHLBI Core建立了合作设施。此外，候选人设计了一项职业发展计划，以确保她准备通过培养她的口头和书面交流，精明制和实验室来彻底担任学术职位管理技能。候选人组建了一个由她的主要导师和其他几位科学家不仅在与线粒体有关的领域具有丰富的科学经验本赠款提出的生物学，但也致力于指导她进行演讲，工作申请和谈判策略。这项培训将有助于候选人确保在学术界担任终身职位。该提案的研究目标是剖析分子机制和身体作用线粒体钙调节。线粒体的钙摄取可以帮助刺激ATP的产生，但也可以许多钙会导致线粒体通透性过渡孔的打开，从而触发细胞死亡。钙可以快速进入线粒体的选择性通道，线粒体钙 Unitporter是一种多蛋白质复合物，其成分开始被识别。 Emre和Micu1是这些在细胞系中已显示在钙摄取调节中起关键作用的蛋白质中的两种。候选人已经生成了EMRE和MICU1缺失的第一个小鼠模型，以阐明体内角色线粒体钙的她最近的出版物表明，MICU1缺失导致线粒体钙超负荷，导致生存和其他缺陷大大降低。接下来，她将表征 EMRE删除了UNITER和有机生理学的分子结构（AIM 1）。她初步数据表明，如果没有EMRE，线粒体将无法摄取钙。因此，候选人将将MICU1和EMRE缺失用作代表“增益”和“损失”功能的遗传试剂线粒体钙摄取，以阐明线粒体钙调节如何改变体内生理在全球基因表达，衰老和疾病中的功能（AIM 2）。许多肌肉和神经退行性疾病长期以来一直与线粒体钙超负荷有关，但是这些小鼠的产生模型将对线粒体钙对有机生理的影响进行首次直接测试。这因此，这些目标的完成既具有基本和临床的重要性。