Frequent somatic mutations of GATA3 in non-BRCA1/BRCA2 familial breast tumors, but not in BRCA1-, BRCA2- or sporadic breast tumors.
Heterozygous somatic mutations of the transcription factor, GATA-3, have recently been reported in approximately 5% breast of tumors unselected for family history. We sequenced the GATA-3 gene in 55 breast tumors from women with familial breast cancer, and found seven heterozygous somatic mutations, all in non-BRCA1/2 cases in which the frequency was 22%. In contrast, we found mutations of GATA-3 in only 4% of 81 sporadic tumors analysed. It is possible that GATA3 mutations occur earlier in the evolution of BRCAx tumors, compared to BRCA1, BRCA2 or sporadic tumors, and are therefore easier to detect by direct sequencing in the presence of some stromal contamination.
Arnold
Jeremy M
JM
Queensland Institute of Medical Research, Royal Brisbane Hospital, Herston, QLD, Australia 4029.
Choong
David Y H
DY
Thompson
Ella R
ER
Waddell
Nic
N
Lindeman
Geoffrey J
GJ
Visvader
Jane E
JE
Campbell
Ian G
IG
Chenevix-Trench
Georgia
G
D051017:Apoptosis Regulatory Proteins; D019313:BRCA1 Protein / Q000235:genetics*; D024682:BRCA2 Protein / Q000235:genetics*; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D004252:DNA Mutational Analysis; D005260:Female; D050990:GATA3 Transcription Factor / Q000235:genetics*; D015972:Gene Expression Regulation, Neoplastic; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006579:Heterozygote; D006801:Humans; D009154:Mutation; D010375:Pedigree; D018570:Risk Assessment; D012307:Risk Factors
D051017:Apoptosis Regulatory Proteins; C118024:BLID protein, human; D019313:BRCA1 Protein; C492913:BRCA1 protein, human; D024682:BRCA2 Protein; C551750:BRCA2 protein, human; D050990:GATA3 Transcription Factor; C494749:GATA3 protein, human