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Pim-1 kinase enhances NFATc activity and neuroendocrine functions in PC12 cells
Margarita Glazova1, Teija L T Aho, Alois Palmetshofer
1Turku Centre for Biotechnology, University of Turku/Abo Akademi University, Tykistökatu 6 B, FI-20520 Turku, Finland.
Abstract:
The activity of NFATc family transcription factors is tightly regulated in T cells via signaling pathways initiated by stimulation of the T cell receptor or its downstream effectors such as the Pim-1 serine/threonine kinase. Here, we demonstrate that NFATc-dependent transcription is inducible also in NGF-differentiated rat PC12 pheochromocytoma cells treated with phorbol esthers, calcium ionophores and/or forskolin and that the Pim-1 kinase can further potentiate the effects of these agents. PC12 cells share many characteristics with sympathetic neurons and can be induced to produce and release catecholamines, such as dopamine and noradrenaline, and inflammatory cytokines, such as interleukin 6. Interestingly, Pim-1 can synergize with forskolin-induced signaling pathways to stimulate also neuroendocrine functions of PC12 cells.
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