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ORIGINAL ARTICLE
Year : 2022  |  Volume : 13  |  Issue : 1  |  Page : 44

Methylation and polymorphism in CDH1 gene promoter among patients with diffuse gastric cancer


1 Department of Genetics & Molecular biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
4 Department of Parasitology and Mycology, School of Medcine Islamic Azad University Mashhad Branch, Mashhad, Iran
5 Department of Cellular and Molecular Nutrition, Shahid Beheshti University of Medical, Tehran, Iran

Correspondence Address:
Majid Kheirollahi
Department of Genetics & Molecular biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan
Iran
Seyed Javad Seyed Tabaei
Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijpvm.IJPVM_288_20

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Background: The promoter methylation and single nucleotide polymorphisms (SNPs) affect the transcription activity of cancer-related genes in several cancers including diffuse gastric cancer (DGC). Here we aimed to evaluate the promoter methylation status and the rs16260 at the promoter region of the CDH1 gene in DGC. Methods: This case-control study was performed of 48 formalin-fixed paraffin-embedded (FFPE) blocks of DGC patients and 41 fresh frozen tissue samples of healthy individuals. Methylation status was evaluated using methylation-specific polymerase chain reaction (PCR) and the rs16260 at the promoter region of the CDH1 gene was assessed using PCR and sequencing method. Results: The occurrence of methylation at the promoter region of the CDH1 gene in DGC patients was significantly higher than control samples (P < 0.0001). The methylated status was significantly associated with the poor differentiated histological type of DGC (P = 0.0428). The frequency of AC genotype and the A allele in DGC patients was significantly higher than the control subjects (P = 0.006 and 0.003, respectively). Conclusions: Here we showed that methylation at the CDH1 promoter may contribute to the DGC development, and also the AC genotype was associated with the risk of DGC.


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