Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4353660 | Progress in Neurobiology | 2010 | 17 Pages |
Abstract
Noxious stimuli can usually cause the aversive sensations, pain and itch. The initial integration of such noxious information occurs in the superficial dorsal horn of the spinal cord (SDH), which is very important for understanding pain sensation and developing effective analgesic strategies. The circuits formed by pools of neurons and terminals within SDH are accepted as the platform for such complicated integrations and are highly plastic under conditions of inflammatory or neuropathic pain. Recent literature offers a complicated, yet versatile view of SDH intrinsic circuits with both inhibitory and excitatory components. However, our knowledge about the adaptative regulation of SDH local circuits is still far from sufficient due to the incomplete understanding of their organization as they are intermingled with primary afferent fibers (PAFs), poorly understood or identified SDH neurons, somehow contradictory data for descending control systems. A more positive view emphasizes abundant modern data on SDH neuron morphology and physiology riding on the back of significant technological advancements used in neuroscience. Reviewing the current literature on this topic thus produced an integrated understanding of SDH neurons and the SDH local circuits involved in noxious transmission and modulation.
Keywords
IPSCNPYDRTAMPACGRPNMDAN-methyl-d-aspartatePAG5-HTMDHPKCKCC2NKCC1CVLMNK-1RinterneuronsDLFCalbindin-D28kPBNTachykininsPAFSthe nucleus of the solitary tractTRPV1DRGMORNOSGFPSDHCTBVIPINSdorsal root ganglion5-hydroxytryptamine (serotonin)EPSCEPSPGluR2/3SOMγ-amino butyric acidδ-Opioid receptorμ-Opioid receptorSynaptic connectivityPrimary afferent fibersEnkenkephalintrhinhibitory postsynaptic currentexcitatory postsynaptic currentDORdynorphindorsal rootSolSomatostatinmedullary dorsal hornSpinal dorsal hornAntinociceptionnociceptionSubstance Psubstantia gelatinosacaudal ventrolateral medullaDynnorepinephrineneurotensinProjection neuronsnitric oxide synthaseDorsal reticular nucleusthyrotropin-releasing hormoneKORParvalbumintransient receptor potential vanilloid type 1excitatory postsynaptic potentialgreen fluorescent proteinProtein kinase Cvasoactive intestinal peptidecalcitonin gene-related peptidePNSKainitecholera toxin subunit BGABAGluglutamateGlyGlycineNeurokinin 1 receptorκ-opioid receptorNeuropeptide Y
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Authors
Sheng-Xi Wu, Wen Wang, Hui Li, Ya-Yun Wang, Yu-Peng Feng, Yun-Qing Li,