Predicting Response to Capecitabine in Women With Metastatic Breast Cancer
Multicentric Pilot Study of Dihydropyrimidine Dehydrogenase (DPD) Deficiency for Predicting Capecitabine Toxicity in Breast Cancer Patients
RATIONALE: Identifying genes that increase a person's susceptibility to side effects caused by capecitabine may help doctors plan better treatment.
PURPOSE: This clinical trial is studying blood samples in predicting response to capecitabine in women with metastatic breast cancer.
研究概览
详细说明
OBJECTIVES:
Primary
- To determine the sensitivity, specificity, and positive and negative predictive values of dihydrouracil/uracil (UH_2/U) ratio measured before starting treatment on grade 3-4 capecitabine-related toxicity in women with metastatic breast cancer.
Secondary
- To prospectively test the value of the germinal genotype of thymidylate synthase (TS) and methylenetetrahydrofolate reductase (MTHFR) as predictors of resistance to capecitabine.
- To evaluate the practical feasibility of such pre-therapeutic screening.
- To determine the sensitivity, specificity, and positive and negative predictive values of dihydropyrimidine dehydrogenase genotyping on grade 3-4 capecitabine-related toxicity in the first and second courses.
- To evaluate the predictive gain provided by genotyping relative to phenotyping alone.
- To evaluate the influence of TS and MTHFR gene polymorphisms on clinical response and duration of response.
- To evaluate the pharmacokinetics of capecitabine and its metabolites and their relationship with UH_2/U and genotype.
- To evaluate the total cost of pre-therapeutic phenotyping alone and the combination of phenotyping and genotyping.
- To exhaustively analyze the 23 exons of the dihydropyrimidine dehydrogenase (DPYD) gene in patients who developed toxicity.
OUTLINE: This is a multicenter study.
Patients receive oral capecitabine twice daily on days 1-14. Treatment repeats every 21 days in the absence of disease progression or unacceptable toxicity.
Blood samples are collected 8-15 days before the start of treatment and periodically on the first day of treatment for dihydropyrimidine dehydrogenase phenotyping (dihydrouracil/uracil ratio and high performance liquid chromatography analysis), genotyping (4 most relevant single nucleotide polymorphisms), and pharmacokinetic analysis.
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
学习地点
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-
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Nice、法国、06189
- Centre Antoine Lacassagne
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
DISEASE CHARACTERISTICS:
- Radiologically (by scintography) or histologically confirmed metastatic breast cancer
- At least 1 measurable or evaluable target lesion
- Receiving capecitabine as monotherapy or with targeted antiangiogenic therapies (e.g., bevacizumab or trastuzumab)
- No uncontrolled brain metastases
- Hormone receptor status not specified
PATIENT CHARACTERISTICS:
- Menopausal status not specified
- Life expectancy ≥ 3 months
- Fertile patients must use effective contraception
- No chronic uncontrolled illness
- No congestive heart failure
- No peripheral venous disease
- No severe uncontrolled infection
- No hypoxemic respiratory failure
- No prior primary cancer except for basal cell carcinoma of the skin
- No psychologic disorder
PRIOR CONCURRENT THERAPY:
- See Disease Characteristics
- No capecitabine co-administered with chemotherapy
学习计划
研究是如何设计的?
设计细节
- 主要用途:治疗
- 分配:非随机化
- 介入模型:单组作业
- 屏蔽:无(打开标签)
武器和干预
参与者组/臂 |
干预/治疗 |
---|---|
其他:capecitabine
|
研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
---|---|
Capecitabine-related toxicity (i.e., hematological, diarrhea, and hand-foot syndrome) recorded during the first and second courses
大体时间:3 months
|
3 months
|
合作者和调查者
调查人员
- 首席研究员:Jean Marc Ferrero, MD、Centre Antoine Lacassagne
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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