Journal
CANCER GENETICS AND CYTOGENETICS
Volume 151, Issue 2, Pages 152-156Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cancergencyto.2003.09.020
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The entire coding regions of the two breast cancer susceptibility genes BRCA1 and BRCA2 from breast cancer patients from 40 Cypriot families with multiple cases of breast and ovarian cancer were sequenced. A total of four protein-truncating mutations were found in six families. In BRCA1, a novel truncating mutation 5429delG was found in exon 21. In BRCA2, three truncating mutations were detected: a frameshift 8984delG in exon 22 and two nonsense mutations C1913X in exon I I and K3326X in exon 27. It is noted that mutation 8984delG was found in three separate families, and haplotype analysis showed that this may be a founder mutation in the Cypriot population. In addition, a pair of rare variants, Q356R and S1512I, was detected in BRCA1 in patients belonging to two Cypriot families. The simultaneous presence of this pair of missense mutations may be associated with the breast cancer phenotype in the Cypriot population. We conclude that the BRCA2 gene appears to play a more important role in familial breast cancer in the Cypriot population than BRCA1. (C) 2004 Elsevier Inc. All rights reserved.
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