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- W2077304039 abstract "To address the roles of tonic activity of protein kinase A (PKA) in the regulation of exocytosis, we examined the effects of selective PKA inhibitors on catecholamine (CA) release from rat chromaffin cells in the absence of PKA activators. Myristoylated protein kinase inhibitor (myr-PKI) reduced the total amount of CA released from a single cell, whereas H-89 did not affect the total amount and frequency of CA release. Amperometric recording revealed that myr-PKI had only a small effect on the number of amperometric spikes per cell, but preferentially inhibited exocytotic events of large quantal size. The change in quantal size distribution was not associated with a reduction of cellular CA content, quantified by using HPLC. These results suggest that the tonic activity of PKA near the cell membrane regulates neurotransmitter release by modulating quantal size." @default.
- W2077304039 created "2016-06-24" @default.
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- W2077304039 date "2004-04-01" @default.
- W2077304039 modified "2023-10-12" @default.
- W2077304039 title "Quantal size of catecholamine release from rat chromaffin cells is regulated by tonic activity of protein kinase A" @default.
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- W2077304039 doi "https://doi.org/10.1016/j.neulet.2004.02.057" @default.
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