Frequent promoter hypermethylation of several tumor suppressor genes in gastric carcinoma and foveolar epithelium / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 510-513, 2007.
Article
in Chinese
| WPRIM
| ID: wpr-298563
ABSTRACT
<p><b>OBJECTIVE</b>To study the promoter hypermethylation of several tumor suppressor genes in gastric carcinoma (GC) tissue and adjacent normal gastric foveolar epithelium (GFE).</p><p><b>METHODS</b>Methylation specific PCR (MSP) was used to examine the promoter methylation of tumor suppressor genes E-cadherin, hMLH1, APC and MGMT in paraffin-embedded gastric cancer tissue and adjacent normal foveolar epithelium in 106 cases.</p><p><b>RESULTS</b>The positive rate of genes promoter methylation was 44.3% (47/106 cases) and 72.6% (77/106 cases) at one or more genes tested in the normal GFE and GC tissue, respectively. There was a significant difference in the positive rates of gene promoter methylation between normal GFE and GC tissue (P = 0.0001). There was a significant association with Laurén classification, degree of differentiation and pTNM staging in GC (P < 0.05), but no significant association with Ming's classification (P > 0.05).</p><p><b>CONCLUSION</b>Tumor suppressor genes promoter methylation is frequently present in GC and adjacent normal gastric foveolar epithelium, especially in Laurén diffuse type GC, poorly differentiated GC, mucus-secreting (signet ring) cell GC and pTNM stage III and IV GC. Our findings indicate that the gene promoter methylation is a common and early event in GC carcinogensis.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Stomach Neoplasms
/
Nuclear Proteins
/
DNA Modification Methylases
/
Cadherins
/
Genes, Tumor Suppressor
/
Promoter Regions, Genetic
/
Genes, APC
/
DNA Methylation
/
Adenomatous Polyposis Coli Protein
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Language:
Chinese
Journal:
Chinese Journal of Oncology
Year:
2007
Type:
Article
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