Cyclooxygenase-2 gene polymorphisms and the risk of colorectal cancer: A population-based study
Open Access
- 9 July 2015
- journal article
- Published by Spandidos Publications in Oncology Letters
- Vol. 10 (3), 1863-1869
- https://doi.org/10.3892/ol.2015.3477
Abstract
The aim of the present study was to determine the association between polymorphisms in the cyclooxygenase-2 (COX-2) gene promoter region, rs20417 G/C and rs2745557 G/A, and the susceptibility to colorectal cancer (CRC) in a Han Chinese population in Shaanxi, China. Polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) were used to detect the polymorphisms of COX-2, rs20417 G/C and rs2745557 G/A, in 300 patients with CRC and 300 healthy individuals in the present case-control study. The results revealed that for the COX-2 rs20417 G/C polymorphism, the GC+CC allele frequency was 80% in CRC patients and 71% in healthy controls [odds ratio (OR)=1.63; 95% confidence interval (CI), 1.12-2.38; P=0.01]. For the COX-2 rs2745557 G/A polymorphism, the GA+AA allele frequency was 84% in CRC patients and 73% in healthy controls (OR=1.94; 95% CI, 1.30-2.90; P<0.01). In addition, among individuals with a smoking history, drinking history or family history of CRC, those who were COX-2 rs20417 (GC+CC) or COX-2 rs2745557 (GA+AA) carriers had a significantly increased risk of developing CRC compared with that of GG genotype carriers (P<0.05). Furthermore, the allelic frequencies of COX-2 rs20417 G/C and rs2745557 G/A in patients with lymph node metastasis in stage III/IV of CRC were significantly different from those of COX-2 rs20417 G/C and rs2745557 G/A in patients without lymph node metastasis in stage I/II (P<0.05). In conclusion, the results of the present study revealed that COX-2 rs20417 C allele carriers and rs2745557 A allele carriers have a significantly increased risk of CRC compared with GG genotype carriers; in addition, the frequencies of these alleles were demonstrated to be associated with lymph node metastasis and CRC progression.Keywords
This publication has 20 references indexed in Scilit:
- COX-2 mRna expression in esophageal squamous cell carcinoma (ESCC) and effect by NSAIDDiseases of the Esophagus, 2008
- Lack of Association of the Cyclooxygenase-2 and Inducible Nitric Oxide Synthase Gene Polymorphism with Risk of Cervical Cancer in Korean PopulationAnnals of the New York Academy of Sciences, 2007
- Increased Cyclooxygenase-2 Expression in Duodenal Compared with Colonic Tissues in Familial Adenomatous Polyposis and Relationship to the −765G → C COX-2 PolymorphismClinical Cancer Research, 2005
- Functional effects and gender association of COX-2 gene polymorphism G-765C in bronchial asthmaJournal of Allergy and Clinical Immunology, 2004
- Cyclooxygenase Isozymes: The Biology of Prostaglandin Synthesis and InhibitionPharmacological Reviews, 2004
- Cyclooxygenase‐2 and 5‐lipoxygenase converging functions on cell proliferation and tumor angiogenesis: implications for cancer therapyThe FASEB Journal, 2003
- Common Promoter Variant in Cyclooxygenase-2 Represses Gene ExpressionArteriosclerosis, Thrombosis, and Vascular Biology, 2002
- Inflammation and colorectal cancer: IBD-associated and sporadic cancer comparedTrends in Molecular Medicine, 2002
- Cyclooxygenase Regulates Angiogenesis Induced by Colon Cancer CellsCell, 1998
- Up-regulation of cyclooxygenase 2 gene expression in human colorectal adenomas and adenocarcinomasGastroenterology, 1994