Role of ER Stress and Fatty Acid Metabolism in Glioma Stem Cells

内质网应激和脂肪酸代谢在胶质瘤干细胞中的作用

基本信息

批准号：
10665639
负责人：
Christian Elias Badr
金额：
$ 39.35万
依托单位：
MASSACHUSETTS GENERAL HOSPITAL
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：
2020-09-15 至 2025-07-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10665639
关键词：
Acidosis Apoptotic Automobile Driving Binding Biochemical Brain Brain Neoplasms CD36 gene Cancer Control Cell Death Cell Maintenance Cellular Stress Central Nervous System Neoplasms Cues DNA Damage DNA Repair Dependence Development Dietary Fatty Acid Dietary Supplementation Disease Double Effect Ectopic Expression Endogenous Factors Endoplasmic Reticulum Environment Enzymes Fatty Acid Desaturases Fatty Acids Frequencies Genes Genetic Genetic Transcription Genomic Instability Glioblastoma Glioma Growth Homeostasis Hypoxia Impairment Implant In Vitro Inositol Invaded Lipid Synthesis Pathway Lipids Malignant - descriptor Malignant Neoplasms Mediating Modeling Molecular Mus NF-kappa B Nose Oncogenic Parkinson Disease Patients Phase I Clinical Trials Phenotype Population Proliferating Property Proteins Radiation Radiation therapy Recurrence Recurrent tumor Regulation Regulatory Element Role Route STAT3 gene Saturated Fatty Acids Signal Pathway Signal Transduction Stearoyl-CoA Desaturase Sterols Stress Supplementation Testing Therapeutic Therapeutic Effect Transcriptional Activation Treatment Efficacy Unsaturated Fatty Acids Work Xenograft procedure analog beta catenin blood-brain barrier permeabilization cancer stem cell clinical translation desaturase endoplasmic reticulum stress fatty acid metabolism in vivo inhibitor lipid biosynthesis misfolded protein mortality mouse model new therapeutic target novel novel therapeutics nutrient deprivation pharmacologic prevent research clinical testing response self-renewal sensor small hairpin RNA stem cell division stem cell model stem cell proliferation stem cell self renewal stem cells stem-like cell targeted treatment temozolomide therapeutic target therapy outcome therapy resistant transcription factor treatment response tumor tumor behavior tumor growth tumor initiation tumor progression tumorigenic uptake

项目摘要

Abstract Glioblastoma is the most malignant and common form of primary central nervous system tumors with high mortality and resistance to therapy. The presence of Glioma stem cells (GSCs) within the tumor, further complicates treatment, owing to the role of GSCs in promoting therapeutic resistance and tumor recurrence. Identifying Intrinsic and extrinsic factors that contribute to GSCs maintenance thus influencing tumor growth, could offer new therapeutic opportunities to treat this fatal disease. We recently showed that the desaturation of fatty acids (FA) is essential for maintaining GSCs self-renewal, proliferation, and in vivo tumor initiation properties. Pharmacological targeting of the desaturase enzyme Stearoyl CoA Desaturase 1 (SCD1) is particularly toxic due to the accumulation of saturated FA, which promotes apoptotic cell death, and achieves a remarkable therapeutic outcome in xenograft mouse models. Our results demonstrate that the dependence of GSCs on FA desaturation presents an exploitable vulnerability to target glioblastoma. However, regulation mechanisms driving key lipogenic enzymes such as SCD1, as well as the molecular role of FA in GSCs maintenance and plasticity remains unclear. Based on our preliminary results, we propose that stress signaling through the endoplasmic reticulum (ER stress), promotes the transcriptional activation of SCD1 as well as oncogenic signaling pathways downstream of SCD1 that are essential for GSCs maintenance. The objective of this proposal is to: 1) Define the role of ER stress in activating lipogenesis and oncogenic signaling that promote GSC self-renewal and increase tumorigenic potential. 2) Exploit the dependency of GSCs on adaptive ER stress signaling to test targeted therapeutics in patient-derived orthotopic GSCs mouse models. Upon completion, this work will elucidate novel mechanisms of plasticity and survival in GBM cancer stem cells and identify novel targeted therapeutics for clinical evaluation in GBM patients.

抽象的胶质母细胞瘤是原发性中枢神经系统肿瘤的最恶性和常见形式死亡率和抵抗治疗。肿瘤内神经胶质瘤干细胞（GSC）的存在，进一步由于GSC在促进治疗性耐药性和肿瘤复发中的作用，使治疗变得复杂。确定有助于GSC维持的内在和外在因素，从而影响肿瘤的生长，可以提供新的治疗机会来治疗这种致命疾病。我们最近表明，脂肪酸（FA）的去饱和度对于维持GSC自我更新至关重要，增殖和体内肿瘤起始特性。去饱和酶的药理学靶向酶 COA去饱和酶1（SCD1）由于饱和FA的积累而特别毒性，促进了凋亡细胞死亡，并在异种移植小鼠模型中实现了显着的治疗结果。我们的结果证明了 GSC对FA的饱和度的依赖性表现出可剥削的靶向胶质母细胞瘤的脆弱性。但是，驱动关键脂肪生物（例如SCD1）的调节机制以及分子的作用 GSCS维护和可塑性中的FA尚不清楚。根据我们的初步结果，我们建议通过内质网（ER应力）通过应力信号传导，促进SCD1的转录激活以及SCD1下游的致癌信号通路，这对于GSC维护至关重要。这该建议的目的是：1）定义ER应力在激活脂肪生成和致癌信号传导中的作用这促进了GSC自我更新并增加了肿瘤的潜力。 2）利用GSC对自适应ER应力信号传导以测试患者衍生的原位GSC小鼠模型中的靶向治疗剂。完成后，这项工作将阐明GBM癌干细胞中可塑性和存活的新型机制并确定用于GBM患者临床评估的新型靶向疗法。