Stable Isotope & Metabolomics Core

稳定同位素和代谢组学核心（SIMC）的使命是提供指导代谢物和底物 复杂体内代谢啮齿动物模型中的通量测定和用于人类临床研究， Einstein-Mount Sinai Diabetes Research Center（ES-DRC）SIMC提供了一个在 增强体内研究的体外代谢方法。这些服务为调查人员提供 专门的分析，以确定底物通量动力学和代谢物分布在细胞器，细胞， 组织和全身水平，从而阐明葡萄糖，蛋白质和 脂质代谢通过与ES-DRC其他核心的合作， 药理学、饮食、环境和遗传改变的影响被彻底表征 对葡萄糖和脂质稳态、胰岛素作用和新陈代谢的影响。候选分子在相关疾病中的作用 组织（即，神经元、肝细胞、骨骼肌、脂肪细胞和β细胞）与葡萄糖相关 体内平衡可以通过使用体内和体外的彻底和明确的分析来具体描述， 在啮齿动物和人类以及细胞系中采用逐步指导的方法进行实验。到 为了实现这些目标，SIMC将：1）进行体内稳定同位素底物通量测定， 测定蛋白质合成、脂肪生成、外周葡萄糖处置、肝葡萄糖再循环的速率， 葡萄糖-甘油循环和葡萄糖-乳酸循环; 2）测定糖酵解（细胞外酸化率） 和分离的细胞、组织外植体或组织中的线粒体氧消耗（线粒体呼吸） 培养，使用海马生物科学通量分析仪，以及更全面的稳定同位素通量 评估; 3）对血浆和组织代谢物谱进行有针对性的假设驱动的评估， 糖酵解/生糖、磷酸戊糖和三羧酸（TCA）循环途径中的关键代谢物， 和脂质代谢，包括脂肪酸，脂肪酰辅酶A和脂肪酰肉碱谱; 4）提供指导 并协助制定方案，其中使用基于质谱仪的通量和代谢物分析 与葡萄糖和脂肪酸控制相关的分子生物化学指标的评价方法 内稳态; 5）与Einstein的其他ES-DRC和机构核心设施协调这些工作， 西奈山。所有这些服务都提供给新的糖尿病研究人员，以及 糖尿病相关项目的研究人员可以通过使用 核心的专业知识和设施。

The mission of the Stable Isotope & Metabolomics Core (SIMC) is to provide guided metabolite and substrate flux determinations in complex in vivo metabolic rodent models and for human clinical investigation for members of the Einstein-Mount Sinai Diabetes Research Center (ES-DRC). The SIMC provides an array of in vitro metabolic methodologies that augment in vivo investigations. These services provide investigators with specialized assays to determine substrate flux dynamics and metabolite profiles at the organelle, cellular, tissue and whole body level thereby elucidating the integrative network of disorders in glucose, protein and lipid metabolism. Through these collaborative efforts with the other Cores of the ES-DRC, the effects of defined pharmacological, dietary, environmental and genetic alterations are thoroughly characterized for their effects on glucose and lipid homeostasis, insulin action, and metabolism. The role of candidate molecules in relevant tissues (i.e., neurons, hepatocytes, skeletal muscle, adipocytes and beta cells) that are related to glucose homeostasis can be specifically delineated by thorough and definitive analyses using in vivo and in vitro experimentation with a step-wise guided approach in rodents and humans as well as in cell lines. To accomplish these goals, the SIMC will: 1) perform in vivo stable isotope substrate flux assays for the determination of rates of protein synthesis, lipogenesis, peripheral glucose disposal, hepatic glucose recycling, glucose-glycerol cycling and glucose-lactate cycling; 2) determine glycolysis (extracellular acidification rates) and mitochondrial oxygen consumption (mitochondrial respiration) in isolated cells, tissue explants or tissue culture, using Seahorse Biosciences Flux Analyzers, as well as more comprehensive stable isotope flux assessments; 3) perform targeted hypothesis-driven assessments of plasma and tissue metabolite profiles for key metabolites in the glycolytic/gluconeogenic, pentose phosphate, and tricarboxylic (TCA) cycle pathways, and lipid metabolism, including fatty acid, fatty acyl CoA and fatty acyl carnitine profiles; 4) provide mentorship and assistance with protocol development , which uses mass spectrometer-based flux and metabolite profiling methods for the evaluation of molecular biochemical targets relevant to the control of glucose and fatty acid homeostasis; and 5) coordinate these efforts with other ES-DRC and Institutional Core facilities at Einstein and Mount Sinai. All of these services are available to investigators new to diabetes research, as well as to investigators working on diabetes-related projects that can be enriched and extended by the use of the expertise and facilities of this Core.