title: Association of interleukin-6 (-174G>C) promoter polymorphism with risk of squamous cell esophageal cancer and tumor location: an exploratory study.
abstract: Chronic inflammation plays a role in transformation from normal cell to malignant state. Interleukin-6 (IL-6) regulates inflammation and various physiological processes. IL-6 promoter polymorphism (-174G>C) is associated with transcription differences in vitro and in vivo. High expression of IL-6 may result in oxidative DNA damage and enhance risk of carcinogenesis. Therefore, we aimed to evaluate association of IL-6 -174G>C polymorphism with predisposition to esophageal cancer (EC) in 369 subjects (168 patients with EC and 201 controls). We observed significant association of IL-6 -174C non-carrier genotype with risk of EC, (OR=2.29; P=0.001), with squamous cell carcinoma (SCC) histology (OR=2.26; P=0.001) and tumor at upper and lower anatomical locations (OR=5.97; P=0.009 and OR=2.34; P=0.034). Patients having IL-6 -174C non-carrier genotype were at elevated risk of metastasis (OR=2.49; P=0.005). In conclusion, IL-6 -174G>C gene polymorphism may confer high risk for EC and its clinical characteristics.
authors.affiliation: Department of Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Raebareilly Road, Lucknow-226014, India.
authors.forename: Rohit
authors.initials: R
authors.lastname: Upadhyay
authors.forename: Meenu
authors.initials: M
authors.lastname: Jain
authors.forename: Shaleen
authors.initials: S
authors.lastname: Kumar
authors.forename: Uday Chand
authors.initials: UC
authors.lastname: Ghoshal
authors.forename: Balraj
authors.initials: B
authors.lastname: Mittal
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000276:immunology; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000276:immunology; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000276:immunology; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D015850:Interleukin-6 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D012307:Risk Factors
chemical_list: D015850:Interleukin-6