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Association Between Promoter Methylation and Expression of Thyroid Hormone Receptor Beta (Thrβ) Gene in Patients With Gastric Cancer in an Iranian Population Publisher Pubmed



Kordi Tamandani DM1 ; Hemati S2 ; Davani SK1 ; Arbabi F3
Authors
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Authors Affiliations
  1. 1. Department of Biology, University of Sistan and Baluchestan, Zahedan, Iran
  2. 2. Department of Oncology, Zahedan University of Medical Science, Zahedan, Iran
  3. 3. Department of Radiation oncology, Isfahan University of Medical Science, Isfahan, Iran

Source: Journal of Gastroenterology and Hepatology (Australia) Published:2015


Abstract

Background and Aim: There is evidence that gastric cancer patients suffer from thyroid disorders. However, the relationship between thyroid receptor (TR) expression and gastric cancer remains unknown. The aim of this study was to evaluate the status of promoter methylation and expression of the thyroid hormone receptor beta (THRβ) gene in gastric cancer patients in an Iranian population. Methods: Analysis of THRβ promoter methylation was performed on 85 pairs of formalin-fixed, paraffin-embedded (FFPE) tissue samples as cases and controls via methylation-specific polymerase chain reaction (PCR [MSP]). The samples were obtained from tumors and surrounding healthy tissues from resected gastric cancers. The expression assay was also performed with 25 FFPE tissue pairs (tumor and surrounding healthy tissues of the same individual) using real-time PCR. Results: The results of the present study show that there is a statistically significant difference between tumor and adjacent normal tissues regarding promoter methylation status and THRβ expression (P=0.04 and P=0.036, respectively). Conclusion: Therefore, promoter methylation of THRβ may be involved in the development of gastric cancer. © 2014 Journal of Gastroenterology and Hepatology Foundation and Wiley Publishing Asia Pty Ltd.
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