Identification of the molecules/pathways that confer acquired radioresistance in

鉴定赋予获得性放射抗性的分子/途径

基本信息

批准号：
8584037
负责人：
Yuchun Du
金额：
$ 7.2万
依托单位：
UNIVERSITY OF ARKANSAS AT FAYETTEVILLE
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：
2013-07-01 至 2015-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8584037
关键词：
Accounting Bioinformatics Cancer Etiology Cancer Patient Cancer cell line Categories Cell Fractionation Cell Line Cell Proliferation Cell model Cells Cellular biology Cessation of life Clinic Clinical Data Development Diagnosis Disease Dose Excision Goals Incidence Ionizing radiation Malignant Neoplasms Malignant neoplasm of pancreas Methods Molecular Molecular Biology Newly Diagnosed Operative Surgical Procedures Outcome Pathway interactions Patients Pharmaceutical Preparations Proteins Proteomics Protocols documentation Publishing Radiation Radiation Tolerance Radiation therapy Radiation-Sensitizing Agents Radio Radioresistance Recurrence Research Resectable Resistance Role Survival Rate Testing Therapeutic Intervention United States Unresectable Work base cancer therapy chemoradiation common treatment design gemcitabine improved novel novel strategies novel therapeutic intervention outcome forecast pancreatic cancer cells programs public health relevance response tool treatment strategy tumor

项目摘要

DESCRIPTION (provided by applicant): Pancreatic cancer is an exceptionally aggressive cancer. It is the fourth leading cause of cancer death in the United States and is increasing in incidence. One of the major factors contributing to the high fatality of pancreatic cancer is the poor responses of most pancreatic cancer patients to radio- and chemo-therapy. Our long-term goal is to understand the molecular mechanisms underlying the exceptional radio- and chemo-resistance in pancreatic cancer. We have recently succeeded in creating pancreatic cancer isogenic cell lines that differ in radiosensitivity from the parental cells. The radioresistant cel lines were generated by exposing pancreatic cancer cells to fractionated ionizing radiation programmed in a way that mimics a typical course of radiotherapy. We hypothesize that the acquired radioresistance in the pancreatic cancer cells are conferred by the aberrant expression of one or more proteins that are involved in cell proliferation and/or survival. Our preliminary results show that several pathways in the radioresistant pancreatic cancer cells have been markedly altered. We propose to use advanced subcellular fractionations, novel quantitative proteomic profiling, and bioinformatics analysis to systematically identify the proteins that are mostly likely to be responsible for the acquired radioresistance in the pancreatic cancer cells (Specific Aim 1), and use molecular and cell biology methods to functionally characterize a well-defined set of the identified proteins with regards to their roles in radio- and chemoradio-resistance in pancreatic cancer (Specific Aim 2). The results from the proposed work will contribute to understanding the molecular mechanisms underlying the exceptional radio- and chemoradio-resistance in pancreatic cancer, and will contribute to designing new strategies to improve the cure rate of pancreatic cancer.

描述（由申请人提供）：胰腺癌是一种极具侵袭性的癌症。它是美国癌症死亡的第四大原因，并且发病率正在上升。导致胰腺癌高死亡率的主要因素之一是大多数胰腺癌患者对放疗和化疗的反应不佳。我们的长期目标是了解胰腺癌特殊的放射和化学抗性背后的分子机制。我们最近成功地创建了胰腺癌同基因细胞系，其放射敏感性与亲代细胞不同。抗辐射细胞系是通过将胰腺癌细胞暴露于以模仿典型放射治疗过程的方式编程的分段电离辐射而产生的。我们假设胰腺癌细胞中的获得性放射抗性是由参与细胞增殖和/或存活的一种或多种蛋白质的异常表达所赋予的。我们的初步结果表明，抗辐射胰腺癌细胞中的数条通路已发生显着改变。我们建议使用先进的亚细胞分级、新型定量蛋白质组学分析和生物信息学分析来系统地识别最有可能导致胰腺癌细胞获得性放射抗性的蛋白质（具体目标 1），并使用分子和细胞生物学方法对一组明确的已识别蛋白质进行功能表征，了解它们在胰腺癌放射和放化疗抗性中的作用（具体目标 2）。拟议工作的结果将有助于了解胰腺癌特殊的放射和放化疗抗性背后的分子机制，并将有助于设计新的策略来提高胰腺癌的治愈率。