{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,4]],"date-time":"2024-08-04T02:29:21Z","timestamp":1722738561276},"reference-count":57,"publisher":"Portland Press Ltd.","content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2009,10,30]]},"abstract":"<jats:p>Cloning of genes related to polyamine metabolism has enabled the generation of genetically modified mice and rats overproducing or devoid of proteins encoded by these genes. Our first transgenic mice overexpressing ODC (ornithine decarboxylase) were generated in 1991 and, thereafter, most genes involved in polyamine metabolism have been used for overproduction of the respective proteins, either ubiquitously or in a tissue-specific fashion in transgenic animals. Phenotypic characterization of these animals has revealed a multitude of changes, many of which could not have been predicted based on the previous knowledge of the polyamine requirements and functions. Animals that overexpress the genes encoding the inducible key enzymes of biosynthesis and catabolism, ODC and SSAT (spermidine\/spermine N1-acetyltransferase) respectively, appear to possess the most pleiotropic phenotypes. Mice overexpressing ODC have particularly been used as cancer research models. Transgenic mice and rats with enhanced polyamine catabolism have revealed an association of rapidly depleted polyamine pools and accelerated metabolic cycle with development of acute pancreatitis and a fatless phenotype respectively. The latter phenotype with improved glucose tolerance and insulin sensitivity is useful in uncovering the mechanisms that lead to the opposite phenotype in humans, Type 2 diabetes. Disruption of the ODC or AdoMetDC [AdoMet (S-adenosylmethionine) decarboxylase] gene is not compatible with mouse embryogenesis, whereas mice with a disrupted SSAT gene are viable and show no harmful phenotypic changes, except insulin resistance at a late age. Ultimately, the mice with genetically altered polyamine metabolism can be used to develop targeted means to treat human disease conditions that they relevantly model.<\/jats:p>","DOI":"10.1042\/bse0460009","type":"journal-article","created":{"date-parts":[[2009,11,4]],"date-time":"2009-11-04T13:19:29Z","timestamp":1257340769000},"page":"125-144","update-policy":"http:\/\/dx.doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Transgenic animals modelling polyamine metabolism-related diseases"],"prefix":"10.1042","volume":"46","author":[{"given":"Leena","family":"Alhonen","sequence":"additional","affiliation":[{"name":"A.I. Virtanen Institute for Molecular Sciences, Biocenter Kuopio, University of Kuopio, P.O. Box 1627, FI-70211 Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne","family":"Uimari","sequence":"additional","affiliation":[{"name":"A.I. Virtanen Institute for Molecular Sciences, Biocenter Kuopio, University of Kuopio, P.O. Box 1627, FI-70211 Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marko","family":"Pietil\u00e4","sequence":"additional","affiliation":[{"name":"A.I. Virtanen Institute for Molecular Sciences, Biocenter Kuopio, University of Kuopio, P.O. Box 1627, FI-70211 Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mervi T.","family":"Hyv\u00f6nen","sequence":"additional","affiliation":[{"name":"A.I. Virtanen Institute for Molecular Sciences, Biocenter Kuopio, University of Kuopio, P.O. 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