title: Hsa-mir-27a genetic variant contributes to gastric cancer susceptibility through affecting miR-27a and target gene expression.
abstract: Aberrant microRNA (miRNA) expression is presently proposed to correlate with various human cancers and common single-nucleotide polymorphisms (SNP) at miRNA genes can influence the maturation of miRNAs or miRNA-mediated transcriptional regulation. However, whether miRNAs SNP alter gastric cancer susceptibility is still unclear. Here we investigated the possible role of a common A/G polymorphism (rs895819) within hsa-mir-27a in the development or progression of gastric cancer, and assessed the effect of rs895819 on the expression of miR-27a and its target gene Zinc finger and BTB domain containing 10 (ZBTB10). In the present case-control study, we found that subjects with the variant genotypes (AG + GG) showed a significantly increased risk of gastric cancer relative to AA carriers (adjusted odds ratio = 1.48, 95% confidence interval 1.06-2.05; P = 0.019). The elevated risk was especially evident in older subjects (age >58 years), men, nonsmokers and rural subjects. A significant association of hsa-mir-27a variant genotypes with lymph node metastasis was also observed. Further functional analyses indicated that variant genotypes might be responsible for elevated miR-27a levels and reduced ZBTB10 mRNA. Moreover, an inverse correlation was found between ZBTB10 and miR-27a levels. In conclusion, we were the first to show that a common polymorphism (rs895819) in hsa-mir-27a, by modulating miR-27a and ZBTB10 levels, acted as an important factor of the gastric cancer susceptibility.
authors.affiliation: Department of Pharmacy, The Affiliated Wuxi Hospital for Maternal and Child Health Care of Nanjing Medical University, Wuxi, Jiangsu Province, China. qingminsun@gmail.com
authors.forename: Qingmin
authors.initials: Q
authors.lastname: Sun
authors.forename: Haijuan
authors.initials: H
authors.lastname: Gu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zeng
authors.forename: Yi
authors.initials: Y
authors.lastname: Xia
authors.forename: You
authors.initials: Y
authors.lastname: Wang
authors.forename: Yali
authors.initials: Y
authors.lastname: Jing
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
mesh_terms: D000368:Aged; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000235:genetics* / Q000502:physiology; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D013274:Stomach Neoplasms / Q000209:etiology / Q000235:genetics* / Q000473:pathology; D016335:Zinc Fingers
chemical_list: C531388:MIRN27 microRNA, human; D035683:MicroRNAs