Document Type : Original Article
Authors
- Mohammad reza Ashrafi 1
- Gholamreza Asadi Karam 2
- Sadif Darvishmoghddam 3
- Moslem Abolhassani 4
- Maryam Iranpour 5
- Zahra Sepehri 6
1 Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
2 Applied Cellular and Molecular Research Center, Kerman University of Medical Sciences, Kerman, Iran
3 Gastroenterology and Hepatology Research Center, Kerman University of Medical Sciences, Kerman, Iranersity of Sciences-Iran
4 Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
5 Pathology Department, Kerman faculty of medical science
6 Dept. of Biochemistry & Medical Genetics University of Manitoba
Abstract
Background: Methylation alterations of tumor suppressor gene promoters are important epigenetic changes in gastric cancer. CDH1 encodes a protein (cadherin1) with essential roles in cell-cell adhesion. In this study, the association of organochlorine pesticide (OCP) serum levels with the methylation profile of this gene was investigated in gastric cancer, intestinal metaplasia (IM), and functional dyspepsia (FD) patients.
Methods: Gastric cancer (n = 34), IM (n = 8), and FD (n = 48) patient serums were analyzed for the determination of OCP levels by gas chromatography. The methylation status of the CDH1 gene promoter was examined by the methylation-specific PCR (MSP) method. Immunohistochemistry (IHC) was used to confirm the reduced protein expression of this gene in methylated samples.
Results: Our findings revealed significant hypermethylation of the CDH1 gene promoter and its reduced expression in gastric cancer patients compared with IM and FD patients. Furthermore, there was a significant association between CDH1 promoter hypermethylation and 2,4-DDT (OR = 1.183; 95% CI = 1.001–1.398; P = 0.048) serum levels in gastric cancer patients.
Conclusion: Our results suggest an association between 2,4-DDT OCP levels in gastric cancer patient serums with CDH1 gene promoter hypermethylation. Additionally, this gene promoter’s methylation may play a role in the progression of pre-cancerous IM towards gastric cancer.
Highlights
Mohammad reza ashrafi(google scholar)(pubmed)
Gholamreza Asadi Karam(google scholar)(pubmed)
sadif darvishmoghddam(google scholar)(pubmed)
moslem abolhassani(google scholar)(pubmed)
maryam Iranpour(google scholar)(pubmed)
zahra sepehri(google scholar)(pubmed)
Keywords
Main Subjects
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