title: Altered subcellular localization of ornithine decarboxylase in Alzheimer's disease brain.
abstract: The amyloid precursor protein can through ligand-mimicking induce expression of ornithine decarboxylase (ODC), the initial and rate-limiting enzyme in polyamine biosynthesis. We report here the regional distribution and cellular localization of ODC immunoreactivity in Alzheimer's disease (AD) brains. In frontal cortex and hippocampus of control cases, the most pronounced ODC immunoreactivity was found in the nucleus. In possible and definite AD the immunoreactivity had shifted to the cytoplasm. In cerebellum of control cases, ODC staining was found in a small portion of Purkinje cells, mostly in the nucleus. In AD, both possible and definite, the number of stained Purkinje cells increased significantly and immunoreactivity was shifted to the cytoplasm, even though it was still prominent in the nucleus. In conclusion, our study reveals an early shift of the ODC immunoreactivity in AD from the nuclear compartment towards the cytoplasm.
authors.affiliation: Karolinska Institutet, Neurotec, Section of Experimental Geriatrics, Novum, 141 86 Stockholm, Sweden. Tatjana.Nilsson@ki.se
authors.forename: Tatjana
authors.initials: T
authors.lastname: Nilsson
authors.forename: Nenad
authors.initials: N
authors.lastname: Bogdanovic
authors.forename: Inga
authors.initials: I
authors.lastname: Volkman
authors.forename: Bengt
authors.initials: B
authors.lastname: Winblad
authors.forename: Ronnie
authors.initials: R
authors.lastname: Folkesson
authors.forename: Eirikur
authors.initials: E
authors.lastname: Benedikz
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000378:metabolism*; D001921:Brain / Q000378:metabolism* / Q000648:ultrastructure; D006801:Humans; D009955:Ornithine Decarboxylase / Q000378:metabolism*; D013347:Subcellular Fractions / Q000378:metabolism*; D014018:Tissue Distribution
chemical_list: D009955:Ornithine Decarboxylase