title: Association between theKRASGene Polymorphisms and Papillary Thyroid Carcinoma in a Chinese Han Population.
abstract: Several studies have reported the association between MAPK signaling pathway gene polymorphisms and papillary thyroid carcinoma (PTC).KRASgene, an oncogene from the mammalianRASgene family plays an important role in the MAPK pathway. This study aimed to identify the potential association ofKRASgene polymorphisms with susceptibility to PTC in a Han Chinese population. A total of 861 patients with PTC, 562 disease controls with nodular goiter and 897 healthy controls were recruited. Four tagSNP polymorphisms (rs12427141, rs712, rs7315339 and rs7960917) ofKRASgene were genotyped by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS).Statistical analyses and haplotype estimations were conducted using Haploview and Unphased softwares. Only significant differences were observed in genotypic frequencies of the rs7315339 polymorphism (χ2=7.234, df=2, p=0.027) between PTC and disease controls. Statistically significant differences in both allelic and genotypic genotypes frequencies for rs712 (Genotype, χ2=8.258, p=0.016) and rs12427141 (Allele, χ2=3.992, p=0.046; Genotype, χ2=8.140, p=0.017) were observed between PTC patients and controls. Haplotype analyses revealed higher frequencies of GA and TA haplotypes (p=0.039 and p=0.003, respectively) from rs712- rs12427141 (two-SNP) or TGA and TTG haplotype containing the alleles from rs7960917, rs712 and rs12427141, as well as the GAT haplotype containing the alleles from rs712, rs12427141 and rs7315339 in PTC patients than in healthy controls (p=0.042, p=0.037, p=0.027, respectively). Inversely, the haplotype TTA from rs7960917, rs712 and rs12427141 or the haplotype TAC from rs712, rs12427141 and rs7315339 was significantly less frequent in the PTC patients than in normal control (p=0.003, p=0.003, respectively). These findings suggest the role of theseKRASgene variants in susceptibility to PTC. Moreover, significant differences of theKRASgene polymorphisms may occur between nodular goiter and PTC.
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.; National Research Institute for Family Planning, Beijing, China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Ning
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Wenwang
authors.initials: W
authors.lastname: Rao
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Jilin Provincial Key Laboratory of Surgical Translational Medicine, Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University, Changchun, Jilin Province, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Yuchen
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Liu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Shangchao
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Jilin Provincial Key Laboratory of Surgical Translational Medicine, Department of Thyroid and Parathyroid Surgery, China-Japan Union Hospital, Jilin University, Changchun, Jilin Province, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, Jilin Province, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Yu
keywords: KRAS; molecular epidemiology.; papillary thyroid carcinoma; polymorphisms