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Proceedings Paper

Role of protein kinase C in the response of an isolated neuron to photodynamic therapy
Author(s): D. E. Bragin; M. S. Kolosov; Anatoly B. Uzdensky
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Paper Abstract

The role of protein kinase C (PKC) in response of neuronal and glial cells to photosensitization with low concentration of sulphonated aluminium phthalocianine Photosens was investigated. Changes in neuron firing and in the structure of chromatin morphology of neuron and glial nuclei were studied using PKC activator 12-0-Tetradecanoylphorbol 13- acetate (TPA) or PKC inhibitors staurosporine, hypercinin or cheleythrine. Protein kinase C is shown to be involved in the neuronal and glial cell responses. Its activation by TPA decreased neuron lifetime, caused nucleus swelling characteristic for necrosis, strongly suppressed apoptotic death of glial cells, and induced gliosis. These effects were probably associated with PKC-induced Ca2+ entry into cytosol. The possible cell death mechanism in this case was nectosis. Inhibition of PK, oppositely, increased neuron lifetime and caused a moderate nucleus swelling. Cheleythrine exerted pro-apoptotic effect on the glial cells surrounding the neuron, whereas other PKC inhibitors, staurosporine and hypercini, suppressed apoptosis.

Paper Details

Date Published: 16 July 2002
PDF: 9 pages
Proc. SPIE 4707, Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III, (16 July 2002); doi: 10.1117/12.475590
Show Author Affiliations
D. E. Bragin, Rostov State Univ. (Russia)
M. S. Kolosov, Rostov State Univ. (Russia)
Anatoly B. Uzdensky, Rostov State Univ. (Russia)

Published in SPIE Proceedings Vol. 4707:
Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III
Valery V. Tuchin, Editor(s)

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