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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Erythropoietin inhibits calcium-induced neurotransmitter release from clonal neuronal cells.

Erythropoietin (EPO) and EPO receptor (EPO-R) are expressed in the brain but their neuronal functions are not yet clarified. The effects of EPO on neurosecretion were studied using clonal rat pheochromocytoma PC12 cells. EPO suppressed Ca(2+)-induced dopamine release from PC12 cells in a concentration- and time-dependent manner. Inhibition was also produced by an EPO mimetic peptide 1 (EMP1), a small synthetic peptide agonist of EPO-R, but not by its inactive analogue in which Cys residues were substituted with Ser. Inhibition was abolished by genistein but not by genistin. EPO and EMP1 induced autophosphorylation of Janus kinase 2 (JAK 2), a tyrosine kinase that associates with EPO-R, and dephosphorylation of GAP-43 in a tyrosine kinase-dependent fashion. These results suggest that EPO suppresses neurotransmitter release through activation of EPO-R linked to JAK2.[1]

References

  1. Erythropoietin inhibits calcium-induced neurotransmitter release from clonal neuronal cells. Kawakami, M., Iwasaki, S., Sato, K., Takahashi, M. Biochem. Biophys. Res. Commun. (2000) [Pubmed]
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