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- W2064687673 abstract "Tetrodotoxin-sensitive (TTXS) sodium currents in dorsal root ganglia (DRG) neurons were enhanced by DcAMP applied acutely or by pre-treatment. Pre-treatment increased peak TTXS by 28%. This compared to the increase of tetrodotoxin-resistant sodium currents (TTXR) of 123%. In both cases the increase was associated with a hyperpolarizing shift in activation potentials. Slow inactivation was slower for both TTXR and TTXS in DcAMP treated neurons but rates of recovery from inactivation were not altered. Lidocaine blocked TTX-R with an IC(50) of 0.51+/-0.15mM (n=9) which was reduced to 0.14+/-0.05mM (n=8, P<0.05) in DcAMP treated cells. The sensitivity of TTX-S currents to lidocaine was not altered by DcAMP (control EC(50)=0.89+/-0.16mM, n=9; DcAMP EC(50)=0.73+/-0.19mM, n=6). It is concluded that TTXS currents in DRG are, like TTX-R currents, enhanced by cAMP but whilst the pharmacology of TTXR channels with respect to lidocaine is altered, that to TTXS channels is not." @default.
- W2064687673 created "2016-06-24" @default.
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- W2064687673 date "2006-11-01" @default.
- W2064687673 modified "2023-09-27" @default.
- W2064687673 title "The effect of dibutyryl cAMP on tetrodotoxin-sensitive and -resistant voltage-gated sodium currents in rat dorsal root ganglion neurons and the consequences for their sensitivity to lidocaine" @default.
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- W2064687673 doi "https://doi.org/10.1016/j.neuropharm.2006.06.021" @default.
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