Gene Networks promoting adipocyte cell differentiation and function

这个实验室的主要目标是了解转铁蛋白和表观基因组的分子机制。 修饰控制调节脂肪组织发育和功能的基因表达程序。 脂肪生成始于已建立的转录因子(TF)活性级联，其中包括协作 CCAAT/增强子结合蛋白β(CEBPβ)和糖皮质激素受体(GR)之间。的一个关键目标 目前的建议是确定CEBPβ及其相关的Paralog如何将转录程序连接到 多能干细胞和早期分化的前脂肪细胞，长期目标是了解 全面的组织因子网络促进脂肪组织的发育、生长和功能。具体目标1 全面鉴定人类脂肪形成过程中活性促进剂的成分。我们会 使用最先进的基因组/蛋白质组学方法来确定染色质相关蛋白 促进脂肪细胞分化。具体目标2阐明了联网的TF的机械作用 以及控制人类脂肪生成和脂肪细胞功能的共同调节因子。新的成脂作用 在AIMS 1中确定的候选蛋白质将通过突变分析和全基因组方法进行检查。 作为一个整体，我们将生成和集成独特的、正交的循环和增强子蛋白质组数据集，以 揭示天然染色质转录调控的基本分子机制。这将澄清 CEBP蛋白和GR如何发挥独特的生物学功能，以及如何解决更普遍的问题 转录因子如何识别、访问和作用于其基因组结合部位以控制组织特异性基因表达。 特定目的3全面鉴定脂肪组织中活性促进剂的成分。我们 假设内脏和皮下白色脂肪增强子蛋白质组的比较 组织和棕色脂肪组织将揭示控制储存库特异基因的基本机制 表达并揭示体内控制脂肪代谢的一组转录调节因子。我们的重点是 鉴于脂肪组织在健康和疾病中的重要性，脂肪组织的发育和功能是有必要的。 事实上，脂肪组织通常有益于健康，但过多的脂肪组织就像肥胖症一样，成为 代谢性疾病包括糖尿病、高脂血症、高血压和心脏病。对以下问题的新见解 脂肪生物学将增强其翻译潜力，以对抗日益严重的有害肥胖症 还有糖尿病。

A major goal of this laboratory is to understand the molecular mechanisms by which TFs and epigenomic modification control gene expression programs that regulate adipose tissue development and function. Adipogenesis begins with an established cascade of transcription factor (TF) activity that includes collaboration between the CCAAT/enhancer binding protein β (CEBPβ) and the glucocorticoid receptor (GR). A key goal of the present proposal is to determine how CEBPβ and its related paralogs bridge the transcriptional programs in multipotent stem cells and early differentiating pre-adipocytes, with a long-term objective of understanding a comprehensive TF network promoting adipose tissue development, growth and function. Specific Aim 1 comprehensively identifies the components of active enhancers during human adipogenesis. We will perform a state-of-the-art genomic/proteomic approach to determine the chromatin-associated proteins promoting adipocyte differentiation. Specific Aim 2 elucidates the mechanistic actions of networked TFs and co-regulators that control human adipogenesis and adipocyte function. Novel adipogenic roles for protein candidates identified in Aims 1 will be examined by mutational analysis and genome-wide approaches. As a whole, we will generate and integrate unique, orthogonal cistromic and enhancer proteomic datasets to reveal fundamental molecular mechanisms for transcriptional regulators in native chromatin. This will elucidate how CEBP proteins and GR perform unique biological functions, and address the more general question of how TFs recognize, access and act at their genomic-binding sites to control tissue-specific gene expression. Specific Aim 3 comprehensively identifies the components of active enhancers in adipose tissue. We hypothesize that comparison of the enhancer proteomes from visceral and subcutaneous white adipose tissues and from brown adipose tissue will reveal fundamental mechanisms controlling depot-specific gene expression and uncover the set of transcriptional regulators controlling lipid metabolism in vivo. Our focus on the development and function of adipose tissue is warranted given its importance in health and disease. Indeed, adipose tissue normally benefits health, yet in excess as in obesity, it becomes a strong risk for metabolic diseases including diabetes, hyperlipidemia, hypertension and heart disease. New insights into adipose biology will enhance its translational potential to combat the harmful and growing epidemics of obesity and diabetes.