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- W1981513094 abstract "We investigated whether PKA-induced phosphorylation was involved in regulation of hyperpolarization-activated current (Ih) in rat dorsal root ganglion (DRG) cells. We examined the effect of the catalytic subunit of PKA (PKAc) on Ih and confirmed an effect of PKAc on Ca2+ channel currents carried by Ba2+ (IBa) in identical neurons as a positive control of PKA activity. After the start of recording, amplitudes of IBa gradually decreased (rundown). An intracellular application of ATP reduced the rundown of IBa and induced a depolarizing shift of Ih activation. The former was partially reversed by PKI but the latter was not affected. An intracellular application of PKAc also prevented the rundown of IBa and this effect was potentiated by okadaic acid (OA). The application of PKAc and OA in combination did not change the electrophysiological properties of Ih although a potentiating effect on IBa was observed in the same neurons. The application of 2-mM ATP in addition to PKAc and OA did not result in an additional potentiation of IBa, but shifted the activation curve of Ih positively. These results suggested that PKA-induced phosphorylation was not involved in the modulatory mechanisms of Ih in rat DRG neurons." @default.
- W1981513094 created "2016-06-24" @default.
- W1981513094 creator A5035044063 @default.
- W1981513094 creator A5038270737 @default.
- W1981513094 date "2007-01-01" @default.
- W1981513094 modified "2023-10-18" @default.
- W1981513094 title "Comparison of effects of PKA catalytic subunit on Ih and calcium channel currents in rat dorsal root ganglion cells" @default.
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- W1981513094 doi "https://doi.org/10.2220/biomedres.28.177" @default.
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