Importance of novel sequence alterations in the FHIT gene on formation of breast cancer.
OBJECTIVE
The character, role and impact of FHIT gene alterations, for which recent studies have shown that the gene has a role in the early stage of carcinogenesis in breast cancer, are still unclear. Thus, the current study evaluated FHIT gene mutations from breast tissue of women with malignant and benign breast disease and to elucidate the frequency and type of mutations in this gene.


METHODS
Mutations in exons 5-9 of the FHIT gene were screened using the intronic primer pairs in 83 breast (67 malignant and 16 benign) tissue samples by single-strand conformational polymorphism and sequencing analysis.


RESULTS
FHIT mutations were detected in 13 of the 67 malignant cases (19.4%) and 2 of the 16 benign cases (12.5%). Four different sequence variants were determined: two novel frame shift mutations (codon 90 insA, codon 146 delT), one intronic novel mutation (IVS8 -17 insA), and one previously identified silent transition type alteration (codon 88 C to T). In addition, determination of this silent alteration caused formation of new exonic splicing enhancer (ESE) motifs on mutated sequences by using the ESEfinder program.


CONCLUSIONS
Our data contribute significantly to that currently known about the presence of FHIT gene mutations on the formation of breast cancer.
Ceçener
Gülşah
G
Department of Medical Biology, Faculty of Medicine, Uludag University, Bursa, Turkey. gcecener@uludag.edu.tr
Egeli
Unal
U
Tunca
Berrin
B
Taşdelen
Ismet
I
Tolunay
Sahsine
S
Bilgel
Nazan
N
D017766:Acid Anhydride Hydrolases / Q000235:genetics*; D000328:Adult; D000368:Aged; D000409:Alanine; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology*; D002277:Carcinoma / Q000235:genetics; D005260:Female; D018226:Fibroadenoma / Q000235:genetics; D016368:Frameshift Mutation; D005973:Glutamine; D006801:Humans; D006965:Hyperplasia / Q000235:genetics; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009154:Mutation; D009363:Neoplasm Proteins / Q000235:genetics*; D010649:Phenylalanine; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D017422:Sequence Analysis, DNA; D013912:Threonine; D000099170:Bis(5'-adenosyl)triphosphatase
D017766:Acid Anhydride Hydrolases; D000409:Alanine; D005973:Glutamine; D009363:Neoplasm Proteins; D010649:Phenylalanine; D013912:Threonine; D000099170:Bis(5'-adenosyl)triphosphatase