Role of Oncometabolite L-2 Hydroxyglutarate in Reprogramming Renal Cell Carcinoma Metabolism

肿瘤代谢物 L-2 羟基戊二酸在肾细胞癌代谢重编程中的作用

基本信息

批准号：
9979802
负责人：
Garrett Joseph Brinkley
金额：
$ 4.61万
依托单位：
UNIVERSITY OF ALABAMA AT BIRMINGHAM
依托单位国家：
美国
项目类别：
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-01 至 2022-07-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9979802
关键词：
Affect Amino Acids Anabolism Antioxidants Back Biological Assay Cell Line Cell Proliferation Cells Critical Thinking DNA Methylation Data Dependence Development Diet Disease Doctor of Medicine Enzymes Epigenetic Process Fellowship Gene Expression Generations Genes Genetic Genetic Transcription Glioma Glucose Glycine Grant Growth Histones In Vitro Laboratories Lipids Lysine Malignant Epithelial Cell Malignant Neoplasms Mass Spectrum Analysis Metabolic Metabolism Metastatic Renal Cell Cancer Methods Methylation Molecular Mus Neoplasms Non-Essential Amino Acid Nucleic Acids Nutritional Requirements Oncogenic Oxidoreductase Pathway interactions Patients Phenotype Phosphoglycerate dehydrogenase Principal Investigator Proliferating Proteins Purines Radiolabeled Renal Cell Carcinoma Renal carcinoma Research Residencies Role Sampling Serine Signal Transduction Starvation Survival Rate Therapeutic Time Training Transcriptional Regulation United States Urologic Oncology Woman Xenograft procedure alpha ketoglutarate aminoacid biosynthesis base cancer cell cancer therapy cancer type cofactor dietary restriction doctoral student enantiomer experimental study histone methylation improved in vivo infrastructure development innovation knock-down men methyl group neoplastic cell novel novel strategies novel therapeutics overexpression personalized medicine restoration skills small hairpin RNA success therapeutic target transcriptome transcriptome sequencing treatment strategy tumor uptake urologic

项目摘要

Renal cell carcinoma (RCC) is among the ten most common neoplasias for both men and women in the United States. Tragically, 25% to 30% of RCC patients present with metastatic disease, with 5-year survival rate of only 5%. There are currently very few therapeutic options for locally advanced or metastatic RCC. Metabolite studies by our lab identified high levels of the putative oncometabolite L-2 Hydroxyglutarate (L-2HG) in kidney cancer. Build up of L-2HG in RCC is due to reduced expression of the enzyme L-2HG dehydrogenase (L2HGDH). L2HGDH frequently undergoes copy loss in RCC. This enzyme normally functions to revert L-2HG back into alpha-ketoglutarate (αKG), a Kreb cycle intermediate. Our lab has demonstrated that restoration of L2HGDH in renal cancer cells suppresses tumor phenotypes. Oncometabolites, metabolites that build up in cancer cells, such as L-2HG, can affect gene transcription by competitively inhibiting αKG-dependent enzymes that modify DNA and histone methylation. Due to their high abundance in cancer cells, oncometabolites present a viable option for the development of personalized treatment strategies in RCC as well as other cancer types. Preliminary studies from our laboratory demonstrate that L-2HG can suppress the expression of genes involved in amino acid biosynthesis and that this loss alters nutrient requirements in high L-2HG RCC cells. Based on these preliminary data, we hypothesize that loss of these enzymes demonstrates a targetable metabolic liability in RCC. In aim 1, we will dissect the molecular underpinnings by which L-2HG can suppress amino acid biosynthesis. In aim 2, we will assess the potential to target these findings therapeutically. Through our studies, we hope to identify novel, metabolism-based approaches for patients with cancers that are oncometabolite driven.

肾细胞癌（RCC）是男性和女性的十个最常见的肿瘤之一美国。可悲的是，患有转移性疾病的RCC患者中有25％至30％的生存率为5年比率仅为5％。目前，对于本地高级或转移性RCC的治疗选择很少。我们的实验室的代谢物研究确定了高水平的推定的oncometabolite L-2羟基戊二酸（L-2HG）在肾癌中。在RCC中建立L-2HG是由于酶L-2HG的表达降低所致脱氢酶（L2HGDH）。 L2HGDH经常在RCC中遭受复制损失。这种酶正常将L-2HG恢复回到α-酮戊二酸（αkg）的功能，一个KREB循环中间体。我们的实验室有证明肾脏癌细胞中L2HGDH的恢复会抑制肿瘤表型。在癌细胞中积累的代谢产物（例如L-2HG）可以影响基因转录竞争性抑制修饰DNA和组蛋白甲基化的αkg依赖性酶。由于他们的高癌细胞中的抽象，oncometabolites为开发个性化提供了可行的选择 RCC以及其他癌症类型的治疗策略。我们实验室的初步研究证明L-2HG可以抑制涉及氨基酸生物合成的基因的表达，并且这种损失改变了高L-2HG RCC细胞中的营养需求。基于这些初步数据，我们假设这些酶的损失表明RCC中有针对性的代谢责任。在AIM 1中，我们将解剖L-2HG可以抑制氨基酸生物合成的分子基础。在AIM 2中，我们将评估对这些发现的潜力。通过我们的研究，我们希望确定小说 oncometabolite驱动的癌症患者的基于代谢的方法。