Molecular Mechanisms Underlying Prostate Cancer Disparities.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 226
- 试验地点
- 1
- 主要终点
- Proportion of high and low expression of identified gene targets in Caucasian and African American specimens
研究概览
简要总结
The purpose of this study is to further elucidate the molecular mechanisms underlying prostate cancer disparities. In previous work the investigators have identified a set of differentially deregulated genes in African American versus Caucasian American prostate cancer. Based on these findings, they hypothesize that they will be able to validate these targets, originally identified in the previous work conducted at The George Washington University Medical Center, in an independent Duke University Medical Center cohort of prostate cancer specimens. In addition, the investigators hypothesize that they will be able to discover novel targets in the Duke University Medical Center cohort of prostate cancer specimens because of regional differences.
详细描述
Individual patient African American and Caucasian American prostate biopsy cores or surgical specimens will be obtained from the following procedures: transrectal ultrasound biopsy of the prostate (TRUSBxP), MR fusion biopsy, intra-operatively (IO) at the time of prostatectomy. Using cellular DNA and RNA, isolated from prostate cancer and patient-matched normal prostate biopsy cores or surgical specimens, the investigators will perform ancestral genotyping, exon arrays, targeted RNA sequencing, and epigenetic analyses. As controls, blood will also be collected. Genomic data from blood and tumor tissue will be compared.
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 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Suspected malignancy of prostate cancer
- •Self-reported race of African American or Caucasian American
- •Age >/= 18 years
- •Able to read, understand and sign an informed consent document
排除标准
- •Collected tumor tissue is inadequate for DNA and RNA analysis and/or is not positive for adenocarcinoma of the prostate.
- •Patients with prior systemic therapy will not be eligible for the study, i.e. radiation or chemo or immunotherapy.
结局指标
主要结局
Proportion of high and low expression of identified gene targets in Caucasian and African American specimens
时间窗: up to 2 years
Total RNA will be interrogated for mRNA expression patterns with the Affymetrix Human Exon 1.0 ST GeneChip. Microarray data will be normalized by quantile normalization with background correction. Targeted RNA sequencing of the previously identified genetic factors specific to African American prostate cancer will confirm altered expression and alternative splicing in these deregulated genes. The Agilent Technologies SureSelect RNA Custom Capture Kit will capture and sequence transcripts. Epigenetic analyses of the genetic factors specific to African American prostate cancer will identify DNA methylation and histone modification patterns in these deregulated genes. The Sequenom EpiTYPER will screen for differential methylation and methylation differences will be quantified using pyrosequencing. Differential histone modification patterns will be explored. Analysis will be performed on 33 prostate cancer biopsy specimens from each of 6 groups stratified by race and Gleason grade.
次要结局
未报告次要终点