Multidrug Resistance Molecular Target Analysis of Human Samples Collected in Clinical Trials Performed Outside of the Intramural National Cancer Institute
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 325
- 试验地点
- 1
- 主要终点
- Expression of MDR1/P-glycoprotein and related drug resistance proteins
研究概览
简要总结
Background:
Resistance to cancer chemotherapy develops in patients, rendering certain treatments ineffective. Despite much research, the prevailing cause of drug resistance is not known.
One mechanism for drug resistance involves a protein called P-glycoprotein, or Pgp, which reduces the effectiveness of cancer treatments by "pumping" anti-cancer drugs out of tumor cells where they are supposed to work against the disease.
Objectives:
To identify and evaluate more thoroughly the roles of Pgp and other substances in mediating drug resistance.
Eligibility:
Patients enrolled in clinical trials of cancer therapies at the Children's Hospital of Pittsburgh; Cancer Centers of Carolinas; Arizona Clinical Research Center; University of Copenhagen; and Herlev Hospital, Copenhagen who have consented to the use of blood, tissue, or tumor samples for laboratory studies.
Design:
Blood, tumor, and tissue samples are collected from participants and sent to the NCI for various laboratory analyses.
...
详细描述
Background:
Ultimately, patients who succumb to cancer do so because of drug resistance. Mechanisms of drug resistance have been explored in the laboratory and in clinical samples for some time, yet the prevailing cause of drug resistance, if indeed there is a single cause, is not known. One mechanism of drug resistance is multidrug efflux, mediated by P-glycoprotein. Other mechanisms have been proposed. Our laboratory has expertise in the analysis of drug transporter expression and activity in clinical samples.
Objectives:
To determine expression of P-glycoprotein and other multidrug transporters thought to mediate clinical drug resistance.
To evaluate inhibition of P-glycoprotein and other multidrug transporters through assessment of efflux activity in cells obtained from patients enrolled on clinical trials at other institutions.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 99 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
结局指标
主要结局
Expression of MDR1/P-glycoprotein and related drug resistance proteins
时间窗: Upon receipt and processing of specimen
次要结局
未报告次要终点