title: MDM2 SNP309 does not confer an increased risk to oral squamous cell carcinoma but may modulate the age of disease onset.
abstract: The MDM2 SNP309 has been associated with increased expression of the protein which could suppress p53 function, and has been shown to modulate risk to cancer. We have previously shown that overexpression of MDM2 is a common event in oral cancers. In the present study, we determined the association between the MDM2 SNP309 polymorphism and oral cancer in 207 oral cancer patients and 116 normal subjects. We genotyped the MDM2 SNP309 by PCR-RFLP. Logistic regression was adapted to calculate odds ratios for MDM2 SNP309 polymorphism from univariate and multivariable adjusted models. Our results suggest that MDM2 SNP309 does not confer increased risk to oral cancer (OR=1.55, 95% CI=0.77-3.11). However, the GG/TG genotype was associated with later disease onset in women above 55 years of age. Collectively, our data suggests that MDM2 SNP309 may modulate the risk to oral cancer and is a modifier of the age at oral cancer onset in women above the age of 55 years.
authors.affiliation: Oral Cancer Research Team, Cancer Research Initiatives Foundation (CARIF), 2nd Floor Outpatient Centre, Subang Jaya Medical Centre, 47500 Subang Jaya, Selangor, Malaysia.
authors.forename: Sharifah
authors.initials: S
authors.lastname: Hamid
authors.forename: Yi-Hsin
authors.initials: YH
authors.lastname: Yang
authors.forename: Karen Ng Lee
authors.initials: KN
authors.lastname: Peng
authors.forename: Siti Mazlipah
authors.initials: SM
authors.lastname: Ismail
authors.forename: Rosnah Binti
authors.initials: RB
authors.lastname: Zain
authors.forename: Kue Peng
authors.initials: KP
authors.lastname: Lim
authors.forename: Wan Mahadzir
authors.initials: WM
authors.lastname: Wan Mustafa
authors.forename: Mannil Thomas
authors.initials: MT
authors.lastname: Abraham
authors.forename: Soo-Hwang
authors.initials: SH
authors.lastname: Teo
authors.forename: Sok Ching
authors.initials: SC
authors.lastname: Cheong
mesh_terms: D017668:Age of Onset; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D016015:Logistic Models; D008296:Malaysia; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics*; D016017:Odds Ratio; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D051736:Proto-Oncogene Proteins c-mdm2 / Q000235:genetics*; D012307:Risk Factors
chemical_list: C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2