Clinical Trial: Familial Colorectal Cancer Registry in Hispanics

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Observational

Official Title: Familial Colorectal Cancer In Puerto Rico: A Feasibility Study

Brief Summary:

Colorectal cancer (CRC) is the second leading cause of cancer in Puerto Rico (PR) accounting for approximately 1,500 individuals annually, which represent 12% of all cancer cases in the island. The genetic epidemiology of CRC among Hispanic populations is not well studied, hence studies focused on large, well defined ethnic groups such as Puerto Ricans, are clearly warranted. The first step towards evaluating the molecular, environmental, and genetic epidemiology of CRC in PR is to establish a population-based familial CRC registry. The following specific aims have been proposed:

Specific Aim 1: To prospectively identify and recruit approximately 300 CRC probands from two distinct geographical areas in PR (Metropolitan and Southern Region). From each proband the investigators will obtain a pedigree extended to second-degree relatives and cousins. Assuming 10% will be positive for a family history of CRC, the investigators will then recruit all 30 probands with a family history of CRC and a sample of 15 family-history negative probands and obtain: paraffin-embedded tumors blocks, blood samples, risk factor and food frequency questionnaires.

Specific Aim 2: To prospectively identify and recruit selected relatives (parents, grandparents, and same generation relatives - cousins and siblings) from the 45 probands identified in Specific Aim 1. In addition, for siblings and cousins of probands (i.e. relatives in the same generation as the proband), the investigators will obtain risk factor and food frequency questionnaires, and for colorectal cancer cases, tumor blocks and pathology reports of their cancers.

Specific Aim 3: To estimate from this pilot study the following parameters: (a) response rate of probands and their selected relatives; (b) response rate of participants for e

Detailed Summary: Data obtained from this study will serve as the foundation for our large, island-wide, population-based, genetic-epidemiologic study of familial colorectal cancer in Puerto Rico. Through this feasibility study, we will assess the feasibility: (1) of recruiting colorectal cancer patients using the PR Central Cancer Registry, (2) of evaluating family pedigrees and recruiting the relatives of probands (3) obtaining tumor, blood, medical and exposure information from both probands and their relatives. Providing important data on Hispanic populations that would enable family-based case-control studies of risk factors for CRC, with an emphasis on candidate genes in selected carcinogenic pathways, genetic and epigenetic modifications. Furthermore, information obtained from this proposal may serve to identify families that would be informative for linkage studies to potentially map new genes, evaluate genotype-phenotype correlations, gene-gene and gene-environmental interactions.
Sponsor: University of Puerto Rico

Current Primary Outcome: We will recruit individuals with colorectal cancer with and without family history of CRC and their immediate family members and obtain the following: paraffin-embedded tumors blocks, blood samples, risk factor and food frequency questionnaires. [ Time Frame: 10 years ]

Original Primary Outcome:

  • We will recruit all 30 probands with a family history of CRC and a sample of 15 family-history negative probands and obtain the following: paraffin-embedded tumors blocks, blood samples, risk factor and food frequency questionnaires. [ Time Frame: 2 years ]
  • We will study the relatives of the CRC probands. [ Time Frame: 2 years ]
  • We will study the following parameters that will help us plan the larger population-based study such as: response rate of probands and their selected relatives, response rate of participants (probands and relatives), etcetera. [ Time Frame: 2 years ]


Current Secondary Outcome: We will study the following parameters that we help us plan the larger population-based study such as: response rate of probands and their selected relatives, response rate of participants (probands and relatives), etcetera. [ Time Frame: 10 years ]

Original Secondary Outcome:

Information By: University of Puerto Rico

Dates:
Date Received: June 24, 2009
Date Started: July 2007
Date Completion: January 2021
Last Updated: December 12, 2016
Last Verified: December 2016