Abstract:
:A new BRCA1 locus product called BRCA1-IRIS has been identified recently. High-risk breast/ovarian families have not been screened for germ-line mutations at the specific BRCA1-IRIS coding sequence, as it was considered merely as part of BRCA1 intron 11. Here we report the first comprehensive screening of germ-line mutations in a cohort of 116 index cases from high-risk breast/ovarian families in which no germ-line mutation was identified in BRCA1 or BRCA2. We did not find germ-line mutations at the specific BRCA1-IRIS coding sequence in any sample. The only heterozygous patter identified by DGGE was caused by a C to A substitution in the non-coding 3' sequence, 123 bases downstream of the BRCA1-IRIS stop codon (IVS11+268C/A). The data indicates that it is probably a neutral change not associated with cancer risk. Our analysis suggests that the role of germ-line mutations at the specific BRCA1-IRIS sequence in breast cancer susceptibility, if any, is marginal and do not explain a significant fraction of high-risk breast/ovarian families, at least in the population analyzed.
journal_name
Fam Cancerjournal_title
Familial cancerauthors
de la Hoya M,Fernández JM,Sánchez de Abajo A,Tosar A,Díaz-Rubio E,Caldés Tdoi
10.1007/s10689-005-1236-xkeywords:
subject
Has Abstractpub_date
2005-01-01 00:00:00pages
317-9issue
4eissn
1389-9600issn
1573-7292journal_volume
4pub_type
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