Acetyl-CoA carboxylase alpha gene and breast cancer susceptibility

Carcinogenesis
Olga M SinilnikovaGilbert M Lenoir

Abstract

The identification of an interaction between BRCA1 and acetyl-CoA carboxylase alpha (ACCalpha), a key enzyme in lipid synthesis, led us to investigate the role of ACCalpha in breast cancer development, where it might contribute to the energy-sensing mechanisms of malignant transformation. In order to investigate if certain ACCalpha alleles may be high-risk breast cancer susceptibility alleles, 37 extended breast and breast/ovarian cancer families negative for BRCA1 and BRCA2 mutations were exhaustively screened for sequence variations in the entire coding sequence, intron-exon junctions, 5'UTR, 3'UTR (untranslated regions) and the promoter regions of the ACCalpha gene. Two possibly disease-associated ACCalpha variants were each identified in a single family and were not present in 137 controls. Multiple polymorphisms were detected in breast cancer families, including 12 single nucleotide polymorphisms where the frequency of the rare allele estimated in controls was >0.10. The observed lack of variation in the ACCalpha coding region along with the presence of extended areas of linkage disequilibrium and low haplotype diversity indicates an overall high preservation of this gene. The prevalence of the ACCalpha haplotypes composed...Continue Reading

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