Deficits in visceral pain and referred hyperalgesia in Nav1.8 (SNS/PN3)-null mice.
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TLDR
There is an essential role for Nav1.8 in mediating spontaneous activity in sensitized nociceptors in the absence of additional stimuli, according to a visceral model of tonic noxious chemical stimulation, cyclophosphamide cystitis.Citations
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Attacking pain at its source: new perspectives on opioids.
TL;DR: The treatment of severe pain with opioids has thus far been limited by their unwanted central side effects, but research promises new approaches, including opioid analgesics acting outside the central nervous system, targeting of opioid peptide–containing immune cells to peripheral damaged tissue, and gene transfer to enhance opioid production at sites of injury.
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Sodium Channels in Normal and Pathological Pain
TL;DR: The contribution of voltage-gated sodium channels to pain is reviewed, with Na(v)1.7 is of special interest because it has been linked to a spectrum of inherited human pain disorders and is upregulated along pain-signaling pathways after nervous system injuries.
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Developmental Neurotoxicity of Pyrethroid Insecticides: Critical Review and Future Research Needs
TL;DR: To better understand the potential for developmental exposure to pyrethroids to cause neurotoxicity, additional, well-designed and well-executed developmental neurotoxicity studies are needed.
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A-803467, a potent and selective Nav1.8 sodium channel blocker, attenuates neuropathic and inflammatory pain in the rat
Michael F. Jarvis,Prisca Honore,Char Chang Shieh,Mark L. Chapman,Shailen K. Joshi,Xu Feng Zhang,Michael E. Kort,William A. Carroll,Brian E. Marron,Robert N. Atkinson,James Thomas,Dong Liu,Michael J. Krambis,Yi Liu,Steve McGaraughty,Katharine L. Chu,Rosemarie Roeloffs,Chengmin Zhong,Joseph P. Mikusa,Gricelda Hernandez,Donna M. Gauvin,Carrie Wade,Chang Zhu,Madhavi Pai,Marc J. C. Scanio,Lei Shi,Irene Drizin,Robert J. Gregg,Mark A. Matulenko,Ahmed A. Hakeem,Michael L. Gross,Matthew D. Johnson,Kennan C. Marsh,P. Kay Wagoner,James P. Sullivan,Connie R. Faltynek,Douglas S. Krafte +36 more
TL;DR: A-803467 is found, a sodium channel blocker that potently blocks tetrodotoxin-resistant currents and the generation of spontaneous and electrically evoked action potentials in vitro in rat dorsal root ganglion neurons and produces significant antinociception in animal models of neuropathic and inflammatory pain.
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The Role of Voltage-Gated Sodium Channels in Pain Signaling
TL;DR: Given the poor efficacy of current analgesics, the selective expression of particular VGSCs in sensory neurons makes these attractive targets for drug discovery, and the increasing availability of gene sequencing and electrophysiological analysis of gene variants provides the opportunity to better target existing therapies in a personalized manner.
References
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Journal ArticleDOI
The Vanilloid Receptor: A Molecular Gateway to the Pain Pathway
Michael J. Caterina,David Julius +1 more
TL;DR: The analysis of vanilloid receptor gene knockout mice confirms the involvement of this channel in pain sensation, as well as in hypersensitivity to noxious stimuli following tissue injury, and demonstrates the existence of redundant mechanisms for the sensation of heat-evoked pain.
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The tetrodotoxin-resistant sodium channel SNS has a specialized function in pain pathways
Armen N. Akopian,Veronika Souslova,Steven England,Steven England,Kenji Okuse,Nobukuni Ogata,Jan Ure,Andrew J.H. Smith,Bradley J. Kerr,Steven B. McMahon,Sue Boyce,Raymond G. Hill,Louise C. Stanfa,Anthony H. Dickenson,John N. Wood +14 more
TL;DR: Data show that SNS is involved in pain pathways and suggest that blockade of SNS expression or function may produce analgesia without side effects, and show that TTX-resistant sodium channel α subunit is encoded by the sns gene.
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Hyperalgesic agents increase a tetrodotoxin-resistant Na+ current in nociceptors
TL;DR: Modulation of TTX-R INa is a mechanism for sensitization of mammalian nociceptors, as indicated by results indicating that three agents that produce tenderness or hyperalgesia in vivo, prostaglandin E2, adenosine, and serotonin, modulate TTx-R Ina.
Journal ArticleDOI
Cyclophosphamide cystitis--identification of acrolein as the causative agent.
TL;DR: The role of acrolein as the causative agent in cyclophosphamide cystitis was proven and N-acetyl-l-cysteine protection against this toxicity was demonstrated.
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PGE2 modulates the tetrodotoxin-resistant sodium current in neonatal rat dorsal root ganglion neurones via the cyclic AMP-protein kinase A cascade.
TL;DR: It is proposed that the PGE2‐mediated increase in excitability in sensory neurones may be due, at least in part, to the cAMP‐protein kinase A‐dependent modulation of the tetrodotoxin‐resistant sodium channel.