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Molecular Analysis of Gastric Cancer, Intestinal Metaplasia and Non-intestinal Metaplasia with Crypt Isolation Technique Ryo Sugimoto 1 , Noriyuki Uesugi 1 , Noriyuki Arakawa 1 , Makoto Eizuka 1 , Keisuke Koeda 2 , Kazuyuki Ishida 1 , Akira Sasaki 2 , Takayuki Matsumoto 3 , Tamotsu Sugai 1 1Department of Molecular Diagnostic Pathology, Iwate Medical University, School of Medicine, Morioka, Japan 2Department of Surgery, Iwate Medical University, School of Medicine, Morioka, Japan 3Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, School of Medicine, Morioka, Japan Keyword: 胃癌 , 腸上皮化生 , DNAメチル化 , 腺管分離 pp.95-104
Published Date 2016/1/25
DOI https://doi.org/10.11477/mf.1403200529

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  • Abstract
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 CpG island hypermethylation is found not only in gastric cancers but also in intestinal metaplasia. However, little is known about the relationship of DNA methylation with intestinal metaplasia. Specimens were examined using a combination of PCR(polymerase chain reaction)-microsatellite assays and PCR-pyrosequencing to detect microsatellite instability and methylation status[HME(high methylation epigenome), IME(intermediate methylation epigenome), or low methylation epigenome]. Intestinal metaplasia was also classified into complete and incomplete types according to mucin phenotype. Although the frequency of HME was higher in isolated cancer glands than in isolated intestinal metaplastic glands, IME was common in both intestinal metaplastic glands and cancerous glands. The methylation frequency of MiR-34b/c was higher in intestinal metaplastic and cancerous glands than in non-metaplastic glands. IME was associated with incomplete metaplastic mucosa. Our results suggest that DNA hypermethylation is enhanced with the progression of intestinal metaplasia.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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