Studying Genes for Barrett's Esophagus in Brothers and Sisters

Esophageal Cancer Clinical Trial

Official title:

A Sibling Pair Study To Identify Barrett's Oesophagus Susceptibility Genes

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT00516347
• Other study ID #: MRC-HCRC-MREC-02/2/57
• Secondary ID: CDR0000561079EU-
• Status: Recruiting
• Phase: N/A
• First received: August 14, 2007
• Last updated: August 9, 2013
• Start date: June 2002

Study information

• Verified date: October 2007
• Source: National Cancer Institute (NCI)
• Contact: n/a
• Is FDA regulated: No
• Health authority: Unspecified
• Study type: Observational

Clinical Trial Summary

RATIONALE: Learning about how often heartburn and other risk factors occur in brothers and sisters and other family members of patients with Barrett's esophagus may help identify other individuals at risk and identify genes for Barrett's esophagus.

PURPOSE: This clinical trial is studying genes for Barrett's esophagus in brothers and sisters.

Description:

OBJECTIVES:

Primary

• To investigate the familial incidence of heartburn and Barrett's esophagus in first and second degree relatives of patients with Barrett's esophagus in the United Kingdom.

• To determine susceptibility genes for Barrett's esophagus in affected sibling pairs.

• To examine gene-environment interactions, such as smoking, alcohol, and Helicobacter pylori status, on familial susceptibility to heartburn and Barrett's esophagus.

Secondary

• To compare the mortality from esophageal adenocarcinoma in family members with heartburn and Barrett's esophagus with deaths from other causes.

OUTLINE: This is a multicenter study.

Patients complete a family history questionnaire. Epidemiological data is also collected about environmental exposures, such as smoking and alcohol history. Any siblings or other living family members affected by heartburn identified from this survey are then contacted to validate their symptoms/diagnoses and to collect other relevant epidemiological data. Family members with heartburn are offered a screening endoscopy for the presence of Barrett's esophagus. In the absence of an endoscopy, a symptom nomogram predictive for the presence of Barrett's esophagus is used.

Patients and their siblings, as well as any other willing family member (affected or non-affected) are asked to have a blood sample (EDTA tube for genetic analysis and a serum sample for Helicobacter pylori status) taken by their physician. Genomic DNA is extracted from lymphocytes and a genome-wide scan is performed using a standard marker set. A computer program is used to verify sibling relationships. Individuals not found to be full siblings are excluded from subsequent analyses. Maximum likelihood score (MLS) and the nonparametric linkage score (NPL) is used to estimate the degree of linkage.

All study participants are flagged with the National Health Service (NHS) Central Register to ascertain the future mortality from esophageal adenocarcinoma compared with deaths from other causes.

PROJECTED ACCRUAL: A total of 200 sibling pairs will be accrued for this study.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 400
• Accepts healthy volunteers: No
• Gender: Both
• Age group: N/A and older

Eligibility

DISEASE CHARACTERISTICS:

• Sibling pairs will be recruited either from the United Kingdom National Barrett's Oesophagus Registry (UKBOR) of patients with Barrett's esophagus from 37 centers OR from National Health Service hospitals

PATIENT CHARACTERISTICS:

• Not specified

PRIOR CONCURRENT THERAPY:

• Not specified

Study Design

N/A

Related Conditions & MeSH terms

• Barrett Esophagus
• Esophageal Cancer
• Esophageal Neoplasms
• Precancerous Condition
• Precancerous Conditions

Intervention

Genetic:
• comparative genomic hybridization

• genetic linkage analysis

Other:
• laboratory biomarker analysis

• questionnaire administration

Procedure:
• study of high risk factors

Locations

Country	Name	City	State
United Kingdom	Hutchison Cancer Research Unit	Cambridge	England

Sponsors (1)

Lead Sponsor	Collaborator
Medical Research Council

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Familial incidence of heartburn and Barrett's esophagus in first and second degree relatives of patients with Barrett's esophagus			No
Primary	Susceptibility genes for Barrett's esophagus in affected sibling pairs			No
Primary	Gene-environment interactions, such as smoking, alcohol, and Helicobacter pylori status, on familial susceptibility to heartburn and Barrett's esophagus			No
Secondary	Comparison of the mortality from esophageal adenocarcinoma in family members with heartburn and Barrett's esophagus with deaths from other causes			No