Functional genetic variants in centrosome-related genes CEP72 and YWHAG confer susceptibility to gastric cancer.

Archives of Toxicology
Jing NiGuangfu Jin

Abstract

Structural and numeric centrosome aberrations can induce chromosome segregation errors and promote tumor development and progression. We systematically evaluated associations of 19,603 single nucleotide polymorphisms (SNPs) across 136 centrosome-related genes with gastric cancer (GC) risk using four GWAS datasets with a total of 3771 cases and 5426 controls. We identified two loci at 15p13.3 and 7q11.23 significantly associated with GC risk, whose risk alleles were correlated with increased mRNA expression of CEP72 (P = 7.30 × 10-4) and YWHAG (P = 1.60 × 10-3), respectively. Dual-luciferase reporter assays confirmed that the risk T allele of rs924607 at 15p13.3 significantly increased a promoter activity of the reporter gene, leading to a higher CEP72 expression level. At 7q11.23, the risk haplotype of rs2961037 [G]-rs2961038 [G] significantly elevated an enhancer activity and the expression of YWHAG. Both the mRNA and protein levels of CEP72 and YWHAG were overexpressed in GC tumor tissues compared with peritumor tissues and overexpression of either gene showed an unfavorable prognosis of GC patients. Moreover, knockdown of either CEP72 or YWHAG inhibited GC cell proliferation, migration and invasion and promoted GC cell apopt...Continue Reading

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Methods Mentioned

BETA
chips
genotyping
PCR
transfection
flow cytometry

Software Mentioned

smartpca
PLINK
ANNOVAR
LocusZoom
RegulomeDB
R package “ clusterProfiler ”
UCSC genome browser
EIGENSOFT
CellQuest
HaploReg

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