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Protein kinase C-alpha and -epsilon are enriched in growth cones of differentiating SH-SY5Y human neuroblastoma cells
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för genetik och patologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för genetik och patologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för genetik och patologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för genetik och patologi.
Vise andre og tillknytning
1995 (engelsk)Inngår i: Journal of Neuroscience Research, ISSN 0360-4012, E-ISSN 1097-4547, Vol. 41, nr 6, s. 782-791Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

SH-SY5Y cells differentiate into neuronal-like cells and express marker proteins like growth-associated protein (GAP-43) and neuropeptide tyrosine when treated with a low concentration (16 nM) of the phorbol ester 12-O-tetradecanoylphorbol-13-acetate (TPA) in the presence of growth factors or serum. Both control and differentiated cells expressed protein kinase C-alpha (PKC-alpha), PKC-epsilon, and PKC-zeta as revealed by Western blot analyses, but the subcellular distribution of the three isoforms was not uniform, indicating specific localized functions of the enzymes. In growth cones prepared from differentiating cells PKC-alpha and PKC-epsilon were enriched. In contrast, PKC-zeta was more evenly distributed within the differentiating cell. Cells treated with a high concentration of TPA (1.6 microM) differentiate poorly and continue to proliferate. In those cells, PKC-alpha and PKC-epsilon were found to be down-regulated while PKC-zeta remained present. Thus, down-regulation of PKC-alpha and PKC-epsilon appears to be incompatible with neuronal differentiation of SH-SY5Y cells. These cells also differentiate when treated with a combination of basic fibroblast growth factor and insulin-like growth factor I. Growth cones isolated from such cells are also enriched in PKC-alpha and PKC-epsilon, but not in PKC-zeta. Based on the subcellular distribution of PKC-alpha and epsilon, and that PKC substrates like GAP-43 and pp60c-src are enriched in SH-SY5Y growth cones, a role during neurite growth is suggested.

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1995. Vol. 41, nr 6, s. 782-791
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URN: urn:nbn:se:uu:diva-51584PubMedID: 7500380OAI: oai:DiVA.org:uu-51584DiVA, id: diva2:79493
Tilgjengelig fra: 2008-10-17 Laget: 2008-10-17 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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