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Molecular Alterations of Gastric Intramucosal Differentiated-type Cancer Based on Nuclear Grade-Molecular Analysis of Low Grade Cancers with Intestinal Phenotype Tamotsu Sugai 1 , Wataru Habano 2 , Yasuhiro Konishi 1 , Yoshiharu Mue 1 , Noriyuki Uesugi 1 , Risaburo Akasaka 1,3 , Eiichiro Yamamoto 4 , Minoru Toyota 4 , Masaki Endoh 3 , Kazuyuki Suzuki 3 1Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Morioka, Japan 2Department of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Morioka, Japan 3Division of Gastroenterology and Hepatology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan 4Department of Biochemistry, School of Medicine, Sapporo Medical University, Sapporo, Japan Keyword: 低異型度胃癌 , 腸型 , MSI , メチル化 , 粘液形質 , LOH pp.1212-1225
Published Date 2010/6/25
DOI https://doi.org/10.11477/mf.1403101976

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 Background and aims : Our aim is to identify molecular alterations of gastric intramucosal cancers with intestinal phenotype based on their nuclear grade. Materials and Methods : Gastric 73 intestinal phenotype cancers that were selected from gastric 171 intramucosal differentiated-type cancers were obtained based on tumor nuclear grade(low grade, 18 ; intermediate grade, 42 ; high grade, 13). In addition, gastric adenomas were also examined. Immunohistochemical expressions for cyclins D1, A, p21, p27, p53,β-catenin and ki-67, loss of heterozygosity(LOH, 3p, 4p, 5q, 17p and 18q), microsatellite instability(MSI)and methylation status using a panel of 6 genes(MLH-1, RUNX3, p16, RASSF2A, SFRP1 and DKK-1)were examined in 73 intestinal phenotype cancers and 6 gastric adenomas. Results. Among the lesions we examined, there were significant differences in the frequencies of the high expressions of cell-cycle-related proteins, high LOH and high methylation status between gastric adenomas and low grade intestinal phenotype cancers. On the other hand, the frequencies of those parameters in high grade cancers were higher than in the other three lesions. Conclusions. Our data confirm that although distinct molecular alterations in the high grade cancer with intestinal phenotype are characterized by molecular alterations, there are no significant differences of molecular alterations between gastric adenomas and low grade cancers with intestinal phenotype.


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

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