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Localization of P2X2 and P2X3 receptors in rat trigeminal ganglion neurons.
Neuroscience 2007; 144(1):208-16N

Abstract

Purine receptors have been implicated in central neurotransmission from nociceptive primary afferent neurons, and ATP-mediated currents in sensory neurons have been shown to be mediated by both P2X3 and P2X2/3 receptors. The aim of the present study was to quantitatively examine the distribution of P2X2 and P2X3 receptors in primary afferent cell bodies in the rat trigeminal ganglion, including those innervating the dura. In order to determine the classes of neurons that express these receptor subtypes, purine receptor immunoreactivity was examined for colocalization with markers of myelinated (neurofilament 200; NF200) or mostly unmyelinated, non-peptidergic fibers (Bandeiraea simplicifolia isolectin B4; IB4). Forty percent of P2X2 and 64% of P2X3 receptor-expressing cells were IB4 positive, and 33% of P2X2 and 31% of P2X3 receptor-expressing cells were NF200 positive. Approximately 40% of cells expressing P2X2 receptors also expressed P2X3 receptors and vice versa. Trigeminal ganglion neurons innervating the dura mater were retrogradely labeled and 52% of these neurons expressed either P2X2 or P2X3 or both receptors. These results are consistent with electrophysiological findings that P2X receptors exist on the central terminals of trigeminal afferent neurons, and provide evidence that afferents supplying the dura express both receptors. In addition, the data suggest specific differences exist in P2X receptor expression between the spinal and trigeminal nociceptive systems.

Authors+Show Affiliations

Department of Anatomy and Cell Biology, University of Melbourne, Parkville, Victoria, 3010, Australia.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17110047

Citation

Staikopoulos, V, et al. "Localization of P2X2 and P2X3 Receptors in Rat Trigeminal Ganglion Neurons." Neuroscience, vol. 144, no. 1, 2007, pp. 208-16.
Staikopoulos V, Sessle BJ, Furness JB, et al. Localization of P2X2 and P2X3 receptors in rat trigeminal ganglion neurons. Neuroscience. 2007;144(1):208-16.
Staikopoulos, V., Sessle, B. J., Furness, J. B., & Jennings, E. A. (2007). Localization of P2X2 and P2X3 receptors in rat trigeminal ganglion neurons. Neuroscience, 144(1), pp. 208-16.
Staikopoulos V, et al. Localization of P2X2 and P2X3 Receptors in Rat Trigeminal Ganglion Neurons. Neuroscience. 2007 Jan 5;144(1):208-16. PubMed PMID: 17110047.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Localization of P2X2 and P2X3 receptors in rat trigeminal ganglion neurons. AU - Staikopoulos,V, AU - Sessle,B J, AU - Furness,J B, AU - Jennings,E A, Y1 - 2006/11/15/ PY - 2006/05/23/received PY - 2006/08/23/revised PY - 2006/09/10/accepted PY - 2006/11/18/pubmed PY - 2007/3/16/medline PY - 2006/11/18/entrez SP - 208 EP - 16 JF - Neuroscience JO - Neuroscience VL - 144 IS - 1 N2 - Purine receptors have been implicated in central neurotransmission from nociceptive primary afferent neurons, and ATP-mediated currents in sensory neurons have been shown to be mediated by both P2X3 and P2X2/3 receptors. The aim of the present study was to quantitatively examine the distribution of P2X2 and P2X3 receptors in primary afferent cell bodies in the rat trigeminal ganglion, including those innervating the dura. In order to determine the classes of neurons that express these receptor subtypes, purine receptor immunoreactivity was examined for colocalization with markers of myelinated (neurofilament 200; NF200) or mostly unmyelinated, non-peptidergic fibers (Bandeiraea simplicifolia isolectin B4; IB4). Forty percent of P2X2 and 64% of P2X3 receptor-expressing cells were IB4 positive, and 33% of P2X2 and 31% of P2X3 receptor-expressing cells were NF200 positive. Approximately 40% of cells expressing P2X2 receptors also expressed P2X3 receptors and vice versa. Trigeminal ganglion neurons innervating the dura mater were retrogradely labeled and 52% of these neurons expressed either P2X2 or P2X3 or both receptors. These results are consistent with electrophysiological findings that P2X receptors exist on the central terminals of trigeminal afferent neurons, and provide evidence that afferents supplying the dura express both receptors. In addition, the data suggest specific differences exist in P2X receptor expression between the spinal and trigeminal nociceptive systems. SN - 0306-4522 UR - https://www.unboundmedicine.com/medline/citation/17110047/Localization_of_P2X2_and_P2X3_receptors_in_rat_trigeminal_ganglion_neurons_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0306-4522(06)01239-5 DB - PRIME DP - Unbound Medicine ER -