Morawski_2013_Neurosci_242_128

Reference

Title : Cellular and ultra structural evidence for cytoskeletal localization of prolyl endopeptidase-like protein in neurons - Morawski_2013_Neurosci_242_128
Author(s) : Morawski M , Nuytens K , Juhasz T , Zeitschel U , Seeger G , Waelkens E , Regal L , Schulz I , Arendt T , Szeltner Z , Creemers J , Rossner S
Ref : Neuroscience , 242 :128 , 2013
Abstract :

The biochemical properties and subcellular localization of prolyl endopeptidase (PREP) in brain are well characterized and its implications in the realization of cognitive processes and in the pathogenesis of neurodegenerative disorders are a matter of intensive investigation. In contrast, very little is known about its homolog, the PREP-like protein (PREPL). In order to obtain initial hints about the involvement of PREPL in physiological processes, a differential proteomic screen was performed with human skin fibroblasts from controls and patients with PREPL deficiency (hypotonia-cystinuria syndrome). The majority of affected proteins represented cytoskeletal proteins, including caldesmon, tropomyosin alpha3 chain, lamin A, beta-actin, gamma-actin, vimentin and zyxin. Therefore, the analysis of PREPL subcellular localization by confocal laser scanning and electron microscopy in mouse neurons was focused on the cytoskeleton. The co-localization of PREPL with cytoskeletal marker proteins such as beta-actin and microtubulin-associated protein-2 was observed, in addition to the presence of PREPL within Golgi apparatus and growth cones. In the mouse brain, PREPL is neuronally expressed and highly abundant in neocortex, substantia nigra and locus coeruleus. This mirrors to some extent the distribution pattern of PREP and points toward redundant functions of both proteins. In the human neocortex, PREPL immunostaining was found in the cytoplasm and in neuropil, in particular of layer V pyramidal neurons. This staining was reduced in the neocortex of Alzheimer's disease (AD) patients. Moreover, in AD brains, PREPL immunoreactivity was observed in the nucleus and in varicose neuritic processes. Our data indicate physiological functions of PREPL associated with the cytoskeleton, which may be affected under conditions of cytoskeletal degeneration.

PubMedSearch : Morawski_2013_Neurosci_242_128
PubMedID: 23485813
Gene_locus related to this paper: human-PREPL

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Citations formats

Morawski M, Nuytens K, Juhasz T, Zeitschel U, Seeger G, Waelkens E, Regal L, Schulz I, Arendt T, Szeltner Z, Creemers J, Rossner S (2013)
Cellular and ultra structural evidence for cytoskeletal localization of prolyl endopeptidase-like protein in neurons
Neuroscience 242 :128

Morawski M, Nuytens K, Juhasz T, Zeitschel U, Seeger G, Waelkens E, Regal L, Schulz I, Arendt T, Szeltner Z, Creemers J, Rossner S (2013)
Neuroscience 242 :128