Tumor Biology

, Volume 35, Issue 4, pp 3431–3438 | Cite as

MDM2 SNP309 is an ethnicity-dependent risk factor for digestive tract cancers

Research Article

Abstract

Published data on the relationship between T309G polymorphism in the murine double minute 2 (MDM2) gene and susceptibility of digestive tract cancers (DTC) are inconclusive. Thus, the aim of this study is to determine whether MDM2 T309G polymorphism is associated with the risk of diverse DTC, including esophagus, stomach, liver, bile duct, pancreas, and colorectum cancers. Relevant studies were identified up to October 1, 2013. Crude odds ratio (OR) and 95 % confidence interval (CI) were used as a measure of the strength of the association. The pooled result based on all studies showed that there was a statistically significant link between MDM2 T309G polymorphism and DTC susceptibility (T vs. G: OR = 0.82, 95%CI = 0.76–0.88). When stratified by race, significant associations were observed for all genetic models among Asians (especially in Chinese population), but not among Caucasians. Subgroup analyses according to tumor location indicated that the genetic variant was associated with esophageal (OR = 0.88, 95%CI = 0.81–0.96 for T vs. G), hepatocellular (OR = 0.69, 95%CI = 0.57–0.84 for T vs. G) and pancreatic cancer risk but not associated with cholangiocarcinoma or colorectum cancer susceptibility. Meanwhile, the G allele was also suggested to be associated with increased gastric cancer risk (OR = 0.68, 95%CI = 0.54–0.87 for TT + TG vs. GG for intestinal type of gastric cancer and OR = 0.18, 95%CI = 0.06–0.50 for TT vs. GG for Helicobacter pylori infection positive stomach cancer). Our study indicates that the MDM2 T309G polymorphism may be an ethnicity-dependent risk factor for DTC, especially for the upper gastrointestinal tract malignancies.

Keywords

Digestive tract cancer MDM2 Polymorphism Susceptibility Risk factor 

Notes

Conflicts of interest

None

Supplementary material

13277_2013_1453_MOESM1_ESM.doc (108 kb)
ESM 1 (DOC 107 kb)
13277_2013_1453_MOESM2_ESM.doc (126 kb)
ESM 2 (DOC 126 kb)

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2013

Authors and Affiliations

  1. 1.Department of General SurgeryThe First Affiliated Hospital of Anhui Medical UniversityHefeiChina
  2. 2.Department of NeurologyThe Second Affiliated Hospital of Anhui Medical UniversityHefeiChina

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