title: The joint association between F5 gene polymorphisms and maternal smoking during pregnancy on preterm delivery.
abstract: Factor V (F5) genetic variants and maternal smoking during pregnancy individually has been associated with increased risk of preterm delivery (PTD). We hypothesize that F5 gene and maternal smoking may synergistically increase the risk of PTD. Three single nucleotide polymorphisms (SNPs) in F5 gene (rs6019, rs2213869 and rs6022) were genotyped in 542 mothers with PTD and 1,141 mothers with term deliveries at the Boston Medical Center. The individual and interactive effects of F5 SNPs and maternal smoking on PTD and gestational age were examined, respectively. The results suggested that maternal smoking, three F5 SNPs and F5 haplotype were individually associated with PTD and gestational age. More importantly, we found significant interactions between the two F5 SNPs (rs6019 and rs6022) and maternal smoking on PTD and gestational age. Compared with non-smoking mothers carrying rs6019 GG genotype, persistently smoking mothers carrying genotypes GC or CC were associated with significantly increased risk of PTD (OR(95% CI): 2.1(1.2-3.6) for GC; 5.7(2.1-15.0) for CC; p-interaction = 0.02). A significant interaction was also observed for gestational age. Similar pattern of interactions was found between rs6022 and maternal smoking on PTD. In summary, our data indicated that F5 gene variants and maternal smoking may synergistically increase the risk of PTD.
authors.affiliation: Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, IL, USA.
authors.forename: Yunxian
authors.initials: Y
authors.lastname: Yu
authors.forename: Hui-Ju
authors.initials: HJ
authors.lastname: Tsai
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.forename: Karen
authors.initials: K
authors.lastname: Mestan
authors.forename: Shanchun
authors.initials: S
authors.lastname: Zhang
authors.forename: Colleen
authors.initials: C
authors.lastname: Pearson
authors.forename: Katherin
authors.initials: K
authors.lastname: Ortiz
authors.forename: Xiping
authors.initials: X
authors.lastname: Xu
authors.forename: Barry
authors.initials: B
authors.lastname: Zuckerman
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Wang
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005165:Factor V / Q000235:genetics*; D005260:Female; D006239:Haplotypes; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D020641:Polymorphism, Single Nucleotide; D011247:Pregnancy; D047928:Premature Birth / Q000097:blood / Q000209:etiology* / Q000235:genetics*; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*; D055815:Young Adult
chemical_list: D005165:Factor V