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Role of protein kinase C in Ca2+ homeostasis disorders in cultured rat neurons during hyperstimulation of glutamate receptors

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The primary culture of rat cerebellar neurons was used to study protein kinase C activity, intracellular variations in calcium concentration ([Ca2+]i), changes in the mitochondrial potential, and neuronal death during hyperstimulation of glutamate receptors and after 24-h incubation with phorbol ester. Prolonged exposure of neurons to glutamate (100 µM, 45 min) was followed by the development of delayed calcium dysregulation. Protein kinase C activity depended on the time of cell incubation with glutamate. Protein kinase C activity increased in response to application of glutamate for 15 min. However, protein kinase C activity decreased after 45-min exposure to glutamate and development of delayed calcium dysregulation. Protein kinase C activity was nearly undetected after 24-h preincubation of neurons with phorbol ester. Under these conditions, delayed calcium dysregulation developed more slowly and was observed in a smaller number of neurons. Neuronal death decreased to 2±1%. Our results suggest that protein kinase C plays an important role in death of neurons, which exhibit delayed calcium dysregulation during glutamate treatment.

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Correspondence to N. A. Persiyantseva.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 145, No. 5, pp. 533–537, May, 2008

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Persiyantseva, N.A., Birikh, K.R., Dvoretskova, E.A. et al. Role of protein kinase C in Ca2+ homeostasis disorders in cultured rat neurons during hyperstimulation of glutamate receptors. Bull Exp Biol Med 145, 595–599 (2008). https://doi.org/10.1007/s10517-008-0159-6

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  • DOI: https://doi.org/10.1007/s10517-008-0159-6

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