title: Associations among lipids, leptin, and leptin receptor gene Gin223Arg polymorphisms and breast cancer in China.
abstract: We evaluated the relationship among the leptin receptor (LEPR) gene Gln223Arg polymorphism, body mass index (BMI), waist and hip circumference ratio (WHR), dietary structure, lifestyle, and other biomarkers with breast cancer and determined whether they could be effective for the prevention and treatment of breast cancer. The Gln223Arg polymorphisms in the LEPR gene were investigated in blood deoxyribonucleic acid (DNA) available for 240 breast cancer cases and 500 controls. Genotyping was performed by polymerase chain reaction-restriction fragment length polymorphism. Leptin, insulin were determined by enzyme-linked immunosorbent assays. We found that the serum levels of leptin, insulin, triglyceride (TG), free cholesterol (FCH), apolipoprotain (APO) A1, and BMI were significantly higher in breast cancer cases than the controls, while physical activity was clearly less in breast cancer cases (P < 0.02 approximately P < 0.001, respectively). Moreover, there were significant association between the Gln223Arg genotype and breast cancer risk; homozygotes for AA and heterozygotes for AG,AG + GG genotypes had been proved to increase the risk of breast cancer, and their corresponding odds ratio were 7.14 (95% confidence interval [CI] = 1.92-25.64), 1.33(95% CI = 1.03-2.70), and 2.04 (95% CI = 1.09-3.82). Interestingly, logistic regression analysis showed that LEPR gene Gln223Arg polymorphism and elevated leptin, insulin, TG, FCH, APOA1, WHR, and reduced APOB increased the risk of developing breast cancer, respectively. And, it also suggested that LEPR gene Gln223Arg polymorphisms, elevated leptin, insulin, TG, FCH, APOA1, WHR, and reduced APOB should play a major role in the development of breast cancer.
authors.affiliation: Department of Etiology, Shanxi Cancer Institute, Taiyuan 030013, China. byshcz@vip.163.com
authors.forename: Cun-Zhi
authors.initials: CZ
authors.lastname: Han
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Du
authors.forename: Jie-Xian
authors.initials: JX
authors.lastname: Jing
authors.forename: Xian-Wen
authors.initials: XW
authors.lastname: Zhao
authors.forename: Fu-Guo
authors.initials: FG
authors.lastname: Tian
authors.forename: Jing
authors.initials: J
authors.lastname: Shi
authors.forename: Bao-Guo
authors.initials: BG
authors.lastname: Tian
authors.forename: Xiu-Ying
authors.initials: XY
authors.lastname: Liu
authors.forename: Li-Jiao
authors.initials: LJ
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D001943:Breast Neoplasms / Q000097:blood* / Q000453:epidemiology / Q000235:genetics*; D002681:China; D005260:Female; D005838:Genotype; D006801:Humans; D020738:Leptin / Q000097:blood*; D008019:Life Style; D008055:Lipids / Q000097:blood*; D008875:Middle Aged; D011110:Polymorphism, Genetic; D054411:Receptors, Leptin / Q000235:genetics*; D049629:Waist-Hip Ratio
chemical_list: C515448:LEPR protein, human; D020738:Leptin; D008055:Lipids; D054411:Receptors, Leptin