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Alteration in expression of polyamine and glucose-related enzyme mRNA after small bowel resection in the rat residual ileum

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The adaptive hyperplasia of the residual intestine after a massive bowel resection is not fully understood. We investigated the alterations in polyamine and glucose-related enzyme mRNA expression during intestinal adaptation. Six-week-old male Wistar rats underwent an 80% resection of the small intestine. The residual ileum was removed on the preoperative day (control) and on postoperative day (POD) 1, 3, 5 and 7. The total RNA was extracted from the mucosa, and a Northern blot analysis was performed. In the residual small intestine, the expression of polyamine synthesis enzymes, ornithine decarboxylase (ODC) and S-adenosylmethionine decarboxylase (SAMDC) mRNAs were increased on POD 1. The expression of polyamine degradation enzymes diamine oxidase (DAO) and spermidine/spermine N1-acetyltransferase (SSAT) mRNA did not change dramatically. Antizyme-1 (AZ-1) mRNA was significantly increased on POD 1. The mRNA expression of glucose absorption and metabolism-related proteins, including the Na+-dependent D-glucose cotransporter (SGLT1), fructose-6-phosphate,2-kinase/fructose-2,6-bisphosphatase (Fru-6-P,2-kinase/Fru-2,6-Pase) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) were only slightly changed on POD 1. The enzymes responsible for polyamine biosynthesis but not catabolism were upregulated at the translational level in enterocytes after a small bowel resection. The expression of glucose transport and glycolysis enzyme mRNAs did not increase after a small bowel resection.
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Document Type: Research Article

Affiliations: Division of Gastroenterology, Shiga University of Medical Science, Tsukinowa-cho, Seta, Otsu, Shiga 520-2192, Japan., Email: [email protected]

Publication date: January 1, 2002

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  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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