Bie BH, Zhang YH, Zhao ZQ. Inhibition of P2X receptor-mediated inward current by protein kinase C in small-diameter dorsal root ganglion neurons of adult rats.
Neurosci Bull 2010;
25:179-86. [PMID:
19633699 DOI:
10.1007/s12264-009-0611-2]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVE
The aim of the present study is to verify the ATP-induced varied responses in isolated dorsal root ganglion (DRG) neurons of the adult rat, and investigate the modulatory effects of specific P2X receptor agonist beta, gamma-me-ATP and protein kinase C (PKC) on P2X receptor-mediated inward current in DRG neurons.
METHODS
Whole cell patch-clamp was employed to record the currents on acutely isolated DRG neurons in the adult rats.
RESULTS
beta, gamma-me-ATP, similar as ATP, evoked 2 distinct subtypes of P2X receptor-mediated inward currents in a dose-dependent manner in DRG neurons. Activation of PKC by phorbol 12, 13-dibutyrate (PDBu) significantly inhibited both subtypes of inward currents mediated by P2X receptors in a dose-dependent manner.
CONCLUSION
Activation of PKC negatively modulated the P2X receptor-mediated currents in rat DRG neurons, which may be of benefit to preventing the over-excitation of nociceptor under inflammatory or neuropathic conditions.
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