Genetic polymorphism in hOGG1 is associated with triple-negative breast cancer risk in Chinese Han women.
8-hydroxy-2'-deoxyguanine (8-OHdG), a typical product of oxidative stress-induced DNA damage, can cause a G-T transversion during DNA replication if it is not removed. Human 8-oxoguanine glycosylase 1 (hOGG1), a key DNA repair gene, recognizes and excises 8-OHdG from damaged DNA accurately; however, a c.977C>G (Ser326Cys) polymorphism in hOGG1 can inhibit the gene's ability to remove 8-OHdG. The aim of present study was to investigate the association between the c.977C>G polymorphism in hOGG1 and the risk of breast cancer in Chinese Han women. We used high-resolution melting and sequencing to analyze the genotypes of 630 patients with sporadic breast cancer patients and 777 healthy controls. We also performed risk-stratified subgroup analyses to determine the association between the c.977C>G polymorphism and other characteristics of breast cancer subgroups. Breast cancer patients and healthy controls did not have significantly different of c.977C/G genotypes (odds ratio [OR] = 1.10, 95% confidence interval [CI] = 0.82-1.49, p = 0.57) and c.977G/G genotypes (OR = 1.34, 95% CI = 0.97-1.84, p = 0.09). However, the c.977G/G genotype was especially prevalent in breast cancer patients who were younger than 55 years (OR = 1.58, 95% CI = 1.05-2.39, p = 0.04), were premenopausal status (OR = 1.87, 95% CI = 1.14-3.06, p = 0.02), had triple-negative disease (OR = 2.14, 95% CI = 1.06-4.29, p = 0.04), or p53-positive disease (OR = 1.56, 95% CI = 1.14-2.12, p = 0.005). These findings suggest that the c.977C>G polymorphism in hOGG1 is associated with an increased risk of breast cancer in Chinese Han women who are younger than 55 years, premenopausal, triple-negative, or p53-positive subgroups.
State Key Laboratory of Reproductive Medicine, Department of Breast Surgery, Nanjing Maternity and Child Health Care Hospital Affiliated Nanjing Medical University, Nanjing, China; Department of Gerontology, First Affiliated Hospital, Nanjing Medical University, Nanjing, China.
Hui
H
Xie
Kai
K
Xia
Hui
H
Rong
Xiaoxiang
X
Chen
D000328:Adult; D000367:Age Factors; D044466:Asian People / Q000235:genetics*; D018270:Carcinoma, Ductal, Breast / Q000737:chemistry / Q000235:genetics*; D018275:Carcinoma, Lobular / Q000737:chemistry / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D045647:DNA Glycosylases / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D017697:Premenopause; D012307:Risk Factors; D017422:Sequence Analysis, DNA; D064726:Triple Negative Breast Neoplasms / Q000737:chemistry / Q000235:genetics*; D016159:Tumor Suppressor Protein p53 / Q000032:analysis
D016159:Tumor Suppressor Protein p53; D045647:DNA Glycosylases; C479058:oxoguanine glycosylase 1, human
BMI; Breast cancer; CI; Genetic polymorphism; HRM; OR; SNP; TNBC; body mass index; confidence interval; hOGG1 gene; high-resolution melting; odds ratio; single nucleotide polymorphism; triple-negative breast cancer