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Original Article
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Volume 334:143-149 January 18, 1996 Number 3
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Germ-Line BRCA1 Mutations in Jewish and Non-Jewish Women with Early-Onset Breast Cancer
Michael G. FitzGerald, B.A., Deborah J. MacDonald, R.N., M.S., Michael Krainer, M.D., Ingrid Hoover, B.A., Erin O'Neil, B.A., Hilal Unsal, M.D., Sandra Silva-Arrieto, B.A., Dianne M. Finkelstein, Ph.D., Peggy Beer-Romero, M.S., Christoph Englert, Ph.D., Dennis C. Sgroi, M.D., Barbara L. Smith, M.D., Ph.D., Jerry W. Younger, M.D., Judy E. Garber, M.D., Rosemary B. Duda, M.D., Kathleen A. Mayzel, M.D., Kurt J. Isselbacher, M.D., Stephen H. Friend, M.D., Ph.D., and Daniel A. Haber, M.D., Ph.D.

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ABSTRACT

Background Mutations in a germ-line allele of the BRCA1 gene contribute to the familial breast cancer syndrome. However, the prevalence of these mutations is unknown in women with breast cancer who do not have the features of this familial syndrome. We sought BRCA1 mutations in women who were given a diagnosis of breast cancer at an early age, because early onset is characteristic of a genetic predisposition to cancer.

Methods Clinical information and peripheral-blood mononuclear cells were obtained from 418 women from the Boston metropolitan area in whom breast cancer was diagnosed at or before the age of 40. A comprehensive BRCA1 mutational analysis, involving automated nucleotide sequencing and a protein-truncation assay, was undertaken in 30 of these women, who had breast cancer before the age of 30. In addition, the BRCA1 mutation 185delAG, which is prevalent in the Ashkenazi Jewish population, was sought with an allele-specific polymerase-chain-reaction assay in 39 Jewish women among the 418 women who had breast cancer at or before the age of 40.

Results Among 30 women with breast cancer before the age of 30, 4 (13 percent) had definite, chain-terminating mutations and 1 had a missense mutation. Two of the four Jewish women in this cohort had the 185delAG mutation. Among the 39 Jewish women with breast cancer at or before the age of 40, 8 (21 percent) carried the 185delAG mutation (95 percent confidence interval, 9 to 36 percent).

Conclusions Germ-line BRCA1 mutations can be present in young women with breast cancer who do not belong to families with multiple affected members. The specific BRCA1 mutation known as 185delAG is strongly associated with the onset of breast cancer in Jewish women before the age of 40.


Source Information

From the Center for Cancer Risk Analysis and the Massachusetts General Hospital Cancer Center, Charlestown, Mass. (M.G.F., D.J.M., M.K., I.H., E.O., H.U., S.S.-A., P.B.-R., C.E., K.J.I., S.H.F., D.A.H.); and the Departments of Pathology (D.C.S.) and Medical and Surgical Oncology (D.M.F., B.L.S., J.W.Y., D.A.H.), Massachusetts General Hospital; the Department of Biostatistics, Harvard School of Public Health (D.M.F.); Dana–Farber Cancer Institute (J.E.G.); Beth Israel Hospital (R.B.D.); and Faulkner Hospital (K.A.M.) — all in Boston.

Address reprint requests to Dr. Haber at MGH Cancer Center, CNY7, Bldg. 149, Charlestown, MA 02129.

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Related Letters:

Breast Cancer and BRCA1 Mutations
Offit K., Mathew C. G., Solomon E., Hodgson S. V., Ithier G., Girard M., Stoppa-Lyonnet D., Sher C., Sharabani-Gargir L., Shohat M., Haber D. A., Garber J. E., Finkelstein D. M., Langston A. A., Malone K. E., Ostrander E. A.
Extract | Full Text  
N Engl J Med 1996; 334:1197-1200, May 2, 1996. Correspondence

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