BRCA1 Haploinsufficiency and Gene Expression

NCT00597987 | Completed

• 1 other identifier: 04-045
• Study Type: observational
• Target: 120
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to collect a blood sample from patients that may be used for research purposes. These blood samples will be used by researchers at this institution to study the causes of breast and ovarian cancer, and to better understand how these cancers develop. We are trying to discover differences in the ways cells work in women with a high genetic risk of developing breast or ovarian cancer. Early data suggest that some genes may be turned on or off in different ways based upon whether or not a woman has a high genetic risk of developing breast or ovarian cancer. The primary objective is to test the hypothesis that BRCA1 haploinsufficiency regulates gene expression on the X chromosome. This hypothesis will be tested by comparing the gene expression profiles of BRCA1 heterozygotes (cases) to an age-matched group of unaffected women who are not BRCA1 mutation carriers (controls).

Conditions

BRCA1 Mutations

Keywords

BRCA1

Outcome Measures

Primary Outcomes (1)

• The primary analysis of these data will be paired t-tests between the age-matched cases and controls for all genes on the X chromosome.

  5 years

Study Arms (1)

1

RNA samples

Eligibility Criteria

• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

The study will be performed using lymphocyte RNA samples from 50 women with BRCA1 mutations and 50 age-matched controls without BRCA1 mutations. Class comparison analysis will be performed on the gene expression data.

You may not qualify if:

• Subjects will be eligible without regard to age, racial, or ethnic status. Subjects with any personal history of cancer will be excluded. Attending physicians authorized to obtain informed consent may exercise discretion in excluding individuals for appropriate medical or other (e.g., minors, mentally impaired) reasons. Patients with an unclassified variant in BRCA1 will be excluded as the functional significance of these variations is unknown.

Sponsors & Collaborators

• Memorial Sloan Kettering Cancer Center: lead
• Memorial Health University Medical Center: collaborator

Study Sites (1)

Memorial Sloan Kettering Cancer Center

New York, New York, 10065, United States

Location

Related Links

• Memorial Sloan-Kettering Cancer Center

Biospecimen

Retention: SAMPLES WITH DNA

Blood samples from cases will be collected from patients who have previously undergone genetic counseling through the Clinical Genetics Service at MSKCC and tested positive for a germline mutation in BRCA1. Blood samples from controls will be obtained from two sources. First from specimens already collected under IRB Protocol #99-030, entitled "Collection of Tissue, Blood, and Cells to be Used for Studying the Causes, Prevention, Diagnosis, and Treatment of Breast Cancer (T. King, PI). Controls will also be collected from patients who have previously undergone genetic counseling through the Clinical Genetics Service at MSKCC and tested negative for germline mutations in BRCA1. Isolation of total RNA from blood will be performed using the PAXgene™ Blood RNA System. This study will use lymphocyte RNA samples from 50 individuals with BRCA1 mutations and 50 age-matched controls. Gene expression profiling will be performed in the Genomics Core Laboratory of MSKCC.

Study Officials

• Tari King, MD

  Memorial Sloan Kettering Cancer Center

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: CASE CONTROL
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: January 9, 2008
• First Posted: January 18, 2008
• Study Start: September 1, 2004
• Primary Completion: September 1, 2012
• Study Completion: September 1, 2012
• Last Updated: September 13, 2012

Record last verified: 2012-09

Locations

US (1)