Tumor Biology

, Volume 36, Issue 6, pp 4757–4762 | Cite as

Association between GT-repeat polymorphism at heme oxygenase-1 gene promoter and gastric cancer and metastasis

  • M. Motovali-Bashi
  • M. Hamidy
Research Article


HO-1 gene encodes heme oxygenase-1 enzyme that catalyzes the oxidation of heme to carbon monoxide (CO). It has also been suggested that cells could be protected by the enzyme against stress. A (GT) n dinucleotide repeat at HO-1 promoter is a polymorphic region and modulates gene transcription and associated with some of diseases. In this study, length of polymorphism GT tandem repeat has been determined and classified into two alleles short (≤28) and long (≥29). In present study, association between GT-repeat polymorphism at heme oxygenase-1 gene promoter and increased risk of gastric cancer and metastasis was investigated. Blood samples from 100 control individuals and 60 gastric cancer cases had taken. Genotypic frequencies of (GT) n repeat for samples were determined using PCR technique and polyacrylamide PAGE electrophoresis. At final, higher frequency alleles were sequenced. Our results show that S-allele is significantly higher in cases in comparison with control groups (p = 0/000, odds ratio (OR) = 4/154). It has been shown that individuals with S/S and S/L genotypes are at high risk of having gastric cancer (p = 0/000, OR = 3/789). Statistic data show association between SS genotype and risk of gastric cancer metastasis (p = 0.017, OR = 3.889). But, there is no significant association between clinicopathological characteristics of the patients and risk of gastric cancer metastasis (p > 0.05). Significant association was found between short allele (SS + SL genotypes) and risk of gastric cancer, and also strong association was found between SS genotype and risk of gastric cancer metastasis.


GT-repeat polymorphism Heme oxygenase-1 promoter Gastric cancer Metastasis Polyacrylamide PAGE 



This study was completed at the University of Isfahan and supported by Graduate Studies Office. The authors are grateful to the office for their financial support. We sincerely thank Dr. Simin Hemati from Oncology, Sayed Al-Shohada Hospital, for her assistance at blood sampling and her help to detect different stages of gastric cancer.


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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  1. 1.Genetic Division, Biology Department, Faculty of SciencesUniversity of IsfahanIsfahanIran

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