A polymorphism C3435T of the MDR-1 gene associated with smoking or high body mass index increases the risk of sporadic breast cancer in women.

Abstract:

:The human multidrug resistance gene 1 (MDR-1) encodes a plasma membrane P-glycoprotein (P-gp) that functions as the transmembrane efflux pump for various structurally unrelated anticancer agents and toxins. Polymorphisms in the MDR-1 gene may have an impact on the expression and function of P-gp, thereby influencing the susceptibility to various diseases, including cancer. We investigated the incidence of C3435T polymorphisms at exon 26 in the MDR-1 gene in 92 women with breast cancer and potential association of altered genotypes with smoking and high body mass index in cancer development among patients. The MDR-1C3435T allelotype and genotype analysis revealed a high incidence (75.0%) of polymorph alteration in the MDR-1 gene. The frequencies of homozygous T/T, heterozygous C/T and homozygous C/C genotypes were 25.0, 50.0 and 25.0%, respectively. The risk of breast carcinoma in patients with MDR-1 polymorphism was significantly associated with the higher body mass index, where women with BMI >30 kg/m(2) and C allele in genotype had a higher risk of disease compared to patients with lower amounts of body fat tissue (p=0.0439). The risk was highest for the homozygous carriers of C allele with BMI >30 kg/m(2) compared to patients with BMI 25.1-30 or

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Zubor P,Lasabova Z,Hatok J,Stanclova A,Danko J

subject

Has Abstract

pub_date

2007-07-01 00:00:00

pages

211-7

issue

1

eissn

1021-335X

issn

1791-2431

journal_volume

18

pub_type

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