Altered subcellular localization of ornithine decarboxylase in Alzheimer's disease brain

Biochemical and Biophysical Research Communications
Tatjana NilssonEirikur Benedikz

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.

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Citations

Feb 5, 2015·BioData Mining·Charalampos S FloudasShyam Visweswaran
Oct 27, 2018·Frontiers in Cellular Neuroscience·Andrei RozovFliza Valiullina-Rakhmatullina
Jun 30, 2019·Alzheimer's Research & Therapy·Leslie A Sandusky-BeltranDaniel C Lee

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