The degradation of glycogen in the lysosomes of newborn rat hepatocytes: glycogen-, maltose- and isomaltose-hydrolyzing acid alpha glucosidase activities in liver

dc.contributor.authorKalamidas, S. A.en
dc.contributor.authorKotoulas, O. B.en
dc.date.accessioned2015-11-24T19:42:10Z
dc.date.available2015-11-24T19:42:10Z
dc.identifier.issn0213-3911-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/24597
dc.rightsDefault Licence-
dc.subjectAnimalsen
dc.subjectAnimals, Newbornen
dc.subjectFemaleen
dc.subjectGlucan 1,4-alpha-Glucosidase/*metabolismen
dc.subjectGlycogen/*metabolismen
dc.subjectHydrolysisen
dc.subjectIsomaltose/metabolismen
dc.subjectLiver/cytology/*enzymologyen
dc.subjectLysosomes/metabolismen
dc.subjectMaltose/metabolismen
dc.subjectOligo-1,6-Glucosidase/*metabolismen
dc.subjectRatsen
dc.subjectRats, Wistaren
dc.subjectalpha-Glucosidases/*metabolismen
dc.titleThe degradation of glycogen in the lysosomes of newborn rat hepatocytes: glycogen-, maltose- and isomaltose-hydrolyzing acid alpha glucosidase activities in liveren
heal.abstractThe lysosomal glucosidase activities and glycogen degradation in newborn rat liver were studied by using biochemical assays, electron microscopy and quantitative morphometry. Glycogen-hydrolyzing, maltose-hydrolyzing and isomaltose-hydrolyzing activities were low at birth but increased afterwards. At the age of 6 hours they were markedly elevated. Actinomycin prevented the development of glucosidase activities indicating that these depend on protein synthesis. Parenteral glucose inhibited all three activities. This was apparently due to the abolition of normal postnatal hypoglycemia and the need for blood glucose. Cyclic AMP increased the glycogen-hydrolyzing but not the maltose-hydrolyzing activity. Propranolol inhibited the glycogen-hydrolyzing but not the maltose-hydrolyzing activity. The observations of this study provide further support for the hypothesis made by previous investigators that these activities are due to different enzymes.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.secondaryhttp://www.ncbi.nlm.nih.gov/pubmed/9987646-
heal.journalNameHistol Histopatholen
heal.journalTypepeer-reviewed-
heal.languageen-
heal.publicationDate1999-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικήςel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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