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• W1860264975 startingPage "2654" @default.
• W1860264975 abstract "NaV 1.8 ion channels have been highlighted as important molecular targets for the design of low MW blockers for the treatment of chronic pain. Here, we describe the effects of PF-01247324, a new generation, selective, orally bioavailable Nav 1.8 channel blocker of novel chemotype.The inhibition of Nav 1.8 channels by PF-01247324 was studied using in vitro patch-clamp electrophysiology and the oral bioavailability and antinociceptive effects demonstrated using in vivo rodent models of inflammatory and neuropathic pain.PF-01247324 inhibited native tetrodotoxin-resistant (TTX-R) currents in human dorsal root ganglion (DRG) neurons (IC50 : 331 nM) and in recombinantly expressed h Nav 1.8 channels (IC50 : 196 nM), with 50-fold selectivity over recombinantly expressed TTX-R hNav 1.5 channels (IC50 : ∼10 μM) and 65-100-fold selectivity over TTX-sensitive (TTX-S) channels (IC50 : ∼10-18 μM). Native TTX-R currents in small-diameter rodent DRG neurons were inhibited with an IC50 448 nM, and the block of both human recombinant Nav 1.8 channels and TTX-R from rat DRG neurons was both frequency and state dependent. In vitro current clamp showed that PF-01247324 reduced excitability in both rat and human DRG neurons and also altered the waveform of the action potential. In vivo experiments n rodents demonstrated efficacy in both inflammatory and neuropathic pain models.Using PF-01247324, we have confirmed a role for Nav 1.8 channels in both inflammatory and neuropathic pain. We have also demonstrated a key role for Nav 1.8 channels in action potential upstroke and repetitive firing of rat and human DRG neurons." @default.
• W1860264975 created "2016-06-24" @default.
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• W1860264975 date "2015-04-10" @default.
• W1860264975 modified "2023-10-11" @default.
• W1860264975 title "A novel selective and orally bioavailable Na_v1.8 channel blocker, PF-01247324, attenuates nociception and sensory neuron excitability" @default.
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• W1860264975 doi "https://doi.org/10.1111/bph.13092" @default.
• W1860264975 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4409913" @default.
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• W1860264975 hasPublicationYear "2015" @default.
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