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Cellular and subcellular localization of paralemmin-1, a protein involved in cell shape control, in the rat brain, adrenal gland and kidney
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylär cellbiologi.
2007 (Engelska)Ingår i: Histochemistry and Cell Biology, ISSN 0948-6143, E-ISSN 1432-119X, Vol. 127, nr 1, s. 13-30Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Paralemmin-1 is a phosphoprotein, lipid-anchored to the cytoplasmic face of membranes and implicated in plasma membrane dynamics and cell process formation. We report an immunoperoxidase histochemical analysis of the cellular and subcellular localization of paralemmin-1 in the rat tissues where its expression is highest: the brain, the adrenal gland and the kidney. Paralemmin-1 is detected throughout the brain, in neuronal perikarya, axons and dendrites including dendritic spines and also in glial processes. In the adrenal gland, paralemmin-1 is highly expressed in the medulla. The kidney displays a pattern of differential paralemmin-1 expression in various structures and cell types, with high concentrations in cells of the parietal epithelium of Bowman’s capsule, intermediate tubules, distal tubules and principal cells of outer medullary collecting ducts. Mosaics of paralemmin-positive and paralemmin-negative cells are observed in proximal tubules, the parietal epithelium of Bowman’s capsule and the endothelium of many blood vessels. Plasma membrane association in epithelia is often polarized: paralemmin-1 concentrates at the apical membranes of adrenal chromaffin cells, but at the basolateral plasma membranes of proximal and distal tubule cells in the kidney. Paralemmin-1 immunoreactivity exhibits a spotted pattern and can be seen both at plasma membranes and within the cytoplasm, where it is often associated with endomembranes. This discontinuous distribution and the detergent extraction properties of paralemmin-1 suggest an association with lipid microdomains. The findings are consistent with a role for paralemmin-1 in the formation and stabilization of plasma membrane elaborations, in neurons as well as in other cell types.

Ort, förlag, år, upplaga, sidor
2007. Vol. 127, nr 1, s. 13-30
Nyckelord [en]
Dendrite, Dendritic spine, Axon Lipid raft, Plasma membrane, Chromaffin cell, Renal tubular epithelium, Endothelium
Nationell ämneskategori
Medicin och hälsovetenskap
Identifikatorer
URN: urn:nbn:se:uu:diva-18923DOI: 10.1007/s00418-006-0209-yISI: 000243000700002PubMedID: 16847661OAI: oai:DiVA.org:uu-18923DiVA, id: diva2:46695
Tillgänglig från: 2006-11-23 Skapad: 2006-11-23 Senast uppdaterad: 2017-12-08Bibliografiskt granskad

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Kilimann, Manfred W.

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