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Screening for modulators of glioma stem cells differentiation

神经胶质瘤干细胞分化调节剂的筛选

基本信息

批准号：
8605810
负责人：
BAKHOS A TANNOUS
金额：
$ 34.72万
依托单位：
MASSACHUSETTS GENERAL HOSPITAL
依托单位国家：
美国
项目类别：
财政年份：
2013
资助国家：
美国
起止时间：
2013-01-18 至 2015-12-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8605810
关键词：
Accounting Acids Adult Affect American Area Automobile Driving Behavior Biological Biological Assay Biological Process Bioluminescence Blood Brain Cell Proliferation Cell Survival Cell model Cell physiology Cells Central Nervous System Neoplasms Cessation of life Clinical Trials Codon Nucleotides Complementary DNA Complex Conditioned Culture Media Cultured Cells Differentiation Inducer Elements Engineering Enzymes Fireflies Gene Expression Gene Transfer Genes Genetic Transcription Glial Fibrillary Acidic Protein Glioblastoma Glioma Human Laboratories Light Luciferases Luciola Malignant - descriptor Malignant Neoplasms Mediating Modeling Molecular Monitor Mus Mutation Neoplasm Metastasis Nude Mice Ostracods Patients Pharmaceutical Preparations Phenocopy Preclinical Drug Evaluation Recurrence Renilla Reporter Reporting Resected Resistance Simian virus 40 Stem cells Stromal Cells Subfamily lentivirinae System Tandem Repeat Sequences Testing Time Tretinoin Validation Variant Western Blotting Xenograft procedure base cancer stem cell clinically relevant coelenterazine conventional therapy drug discovery high throughput screening in vivo internal control luciferin neoplastic cell novel pre-clinical promoter public health relevance screening self-renewal stem cell differentiation thermostability tool tumor

项目摘要

DESCRIPTION (provided by applicant): Gliomas account for about 60% of all primary CNS tumors. Glioblastoma (GBM) or grade IV gliomas which comprise 50.9% of all gliomas are the most malignant form. Glioblastoma tumors are highly heterogeneous and there is a complex interaction among different types of tumor cells and stromal cells within the tumor. Recently it has been shown that the majority of tumor cells do not have the capacity to recapitulate a phenocopy of the original tumor and that only a small subpopulation of cells in the tumor, called cancer stem cells, have that ability upon xenotransplantation in nude mice. According to the cancer stem cell hypothesis, molecular alterations in cancer either convert normal stem cells into aberrant counterparts or cause a more differentiated cell to revert towards a stem cell-like behavior. These cancer stem cells appear to be more resistant to conventional therapy, as compared to the non-cancer stem cells. Following current therapy for high-grade glioma tumors, most patients die within a year from a new secondary tumor foci forming within one centimeter of the resected area. These foci are enriched for cancer stem cells, and it is likely that they are responsible for tumor recurrence. Targeted therapies aiming at eradication of glioma stem cells, or reverting these cells into a more differentiated state which can then responds to conventional therapy is highly beneficial and are current being tested in clinical trials using all-trans retinoc acids (ATRA; ://clinicaltrials.gov). In this proposal, we will optimize a triple secreted reporter system for high-throughput screening and use it to find modulators of glioma stem cells. We will simultaneously screen for drugs which either: (1) revert glioblastoma cancer stem cells into a more differentiated state, making them susceptible to conventional therapy; (2) eradicate these cells. Potential drug hits will then be analyzed in an intracranial glioma stem cells model which infiltrates the brain of mice similar to human tumors.

描述(申请人提供)：胶质瘤约占所有原发中枢神经系统肿瘤的60%。胶质母细胞瘤(GBM)或IV级胶质瘤是恶性程度最高的肿瘤，占所有胶质瘤的50.9%。胶质母细胞瘤是高度异质性的肿瘤，肿瘤内不同类型的肿瘤细胞和间质细胞之间存在复杂的相互作用。最近有研究表明，大多数肿瘤细胞没有能力重塑原始肿瘤的表型，而在裸鼠异种移植后，肿瘤中只有一小部分细胞具有这种能力，这种细胞被称为肿瘤干细胞。根据癌症干细胞假说，癌症中的分子变化要么将正常干细胞转化为异常干细胞，要么导致分化程度更高的细胞恢复干细胞样行为。与非癌症干细胞相比，这些癌症干细胞似乎对传统疗法更具抵抗力。根据目前对高级别胶质瘤的治疗，大多数患者在一年内死于在切除区域一厘米内形成的新的继发性肿瘤灶。这些病灶富含癌症干细胞，很可能是对肿瘤复发负有责任。旨在根除胶质瘤干细胞或将这些细胞恢复到更具分化状态的定向治疗非常有益，目前正在使用全反式维甲酸(ATRA；：//Clinicaltrials.gov)进行临床试验。在这个方案中，我们将优化一个高通量筛选的三重分泌报告系统，并使用它来寻找胶质瘤干细胞的调节器。我们将同时筛选药物：(1)将胶质母细胞瘤癌症干细胞恢复到更分化的状态，使其容易受到传统治疗的影响；(2)根除这些细胞。然后，将在颅内胶质瘤干细胞模型中分析潜在的药物靶点，该模型类似于人类肿瘤，渗透到小鼠的大脑。