Tumor Biology

, Volume 35, Issue 1, pp 239–245 | Cite as

Meta-analysis: glutathione S-transferase T1 null allele is associated with gastric cancer risk

  • Wei Sun
  • Li Yao
  • Benchun Jiang
Research Article


Allelic variant within genes encoding glutathione S-transferase T1 (GSTT1) has been suggested to be a possible risk factor of gastric cancer, but previous studies provide controversial results. This study aimed to assess the effects of GSTT1 polymorphism on gastric cancer by means of meta-analysis. We included published studies on the relationship between GSTT1 null allele and gastric cancer risk after searching electronic databases. A meta-analysis was conducted by calculating the pooled odds ratios (OR) and the 95 % confidence intervals (95 % CI). Forty-two studies with a total of 8,203 gastric cancer cases and 13,866 controls were included into this meta-analysis. When all 42 studies were pooled into this meta-analysis, there was a significant association between the GSTT1 null allele and gastric cancer risk (OR = 1.24, 95 % CI 1.14–1.36, P < 0.00001). Sensitivity analysis by excluding individual studies showed that there was no effect on the pooled OR with 95 % CI. After excluding studies with low quality, there was still a significant association between the GSTT1 null allele and gastric cancer risk (OR = 1.24, 95 % CI 1.13–1.36, P < 0.00001). In the subgroup analysis, there was a significant association between the GSTT1 null allele and gastric cancer risk in both Europeans and Asians. There was no risk of publication bias in this meta-analysis. Our results suggest that GSTT1 null allele is associated with increased risk of gastric cancer.


Gastric cancer GSTT1 Polymorphism 



We sincerely expressed our thanks to the authors of the primary studies.

Conflict of interests



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2013

Authors and Affiliations

  1. 1.Department of General Surgery, Affiliated Shengjing HospitalChina Medical UniversityShenyangChina
  2. 2.Department of Nephrology, The First Affiliated HospitalChina Medical UniversityShenyangChina

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