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Signaling pathways from cannabinoid receptor-1 activation to inhibition of N-methyl-D-aspartic acid mediated calcium influx and neurotoxicity in dorsal root ganglion neurons.
J Pharmacol Exp Ther 2009; 331(3):1062-70JP

Abstract

Although the activation of cannabinoid receptor-1 (CB1) receptors by cannabinoids is known to inhibit neuronal hyperexcitability and reduce excitotoxic cell death, the mechanistic links between these two actions remain elusive. We tested the hypothesis that activation of CB1 receptors inhibits N-methyl-d-aspartic acid (NMDA)-mediated calcium influx and cell death via the inositol triphosphate (IP(3)) signaling pathway in both primary dorsal root ganglia neurons and a cultured neuronal cell line (F-11 cells). These cells were pretreated with the cannabinoid agonist (R)-(+)-[2,3-dihydro-5-methyl-3-(4-morpholinylmethyl)pyrrolo[1,2,3-de)-1,4-benzoxazin-6-yl]-1-napthalenylmethanone (R-(+)-WIN 55,212-2; WIN) before exposure to NMDA. Concentrations of cytosolic calcium were measured with the ratiometric calcium indicator, Fura-2, and cell death was determined by a cell viability test. WIN dose-dependently attenuated both the calcium influx and cell death induced by NMDA. These effects were blocked by selective cannabinoid CB1 receptor antagonists N-(piperidin-1-yl)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (SR141716A) or N-(piperidin-1-yl)-5-(4-iodophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (AM251), but not CB2 receptor antagonist N-[(1S)-endo-1,3,3,-trimethylbicyclo[2.2.1]heptan-2-yl]-5-(4-chloro-3-methylphenyl)-1-(4-methyl-benzyl)-pyrazole-3-carboxamide (SR144528). It is interesting to note that a transient Ca(2+) signal was observed after the acute application of WIN. This Ca(2+) increase was blocked by a CB1 receptor antagonist AM251, IP(3) receptor antagonist 2- aminoethyl diphenylborinate, or by depleting intracellular Ca(2+) stores with the endoplasmic reticulum Ca(2+) pump inhibitor thapsigargin. Removal of extracellular Ca(2+), on the other hand, had no effect on the CB1 receptor-induced Ca(2+) increase. These data suggest that WIN triggers a cascade of events: it activates the CB1 receptor and the IP(3) signaling pathway, stimulates the release of Ca(2+) from intracellular stores, raises the cytosolic Ca(2+) levels, and inhibits the NMDA-mediated Ca(2+) influx and cell death through a process that remains to be determined.

Authors+Show Affiliations

Departments of Pain Management, Anesthesiology Institute and Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

19752241

Citation

Liu, Qing, et al. "Signaling Pathways From Cannabinoid Receptor-1 Activation to Inhibition of N-methyl-D-aspartic Acid Mediated Calcium Influx and Neurotoxicity in Dorsal Root Ganglion Neurons." The Journal of Pharmacology and Experimental Therapeutics, vol. 331, no. 3, 2009, pp. 1062-70.
Liu Q, Bhat M, Bowen WD, et al. Signaling pathways from cannabinoid receptor-1 activation to inhibition of N-methyl-D-aspartic acid mediated calcium influx and neurotoxicity in dorsal root ganglion neurons. J Pharmacol Exp Ther. 2009;331(3):1062-70.
Liu, Q., Bhat, M., Bowen, W. D., & Cheng, J. (2009). Signaling pathways from cannabinoid receptor-1 activation to inhibition of N-methyl-D-aspartic acid mediated calcium influx and neurotoxicity in dorsal root ganglion neurons. The Journal of Pharmacology and Experimental Therapeutics, 331(3), pp. 1062-70. doi:10.1124/jpet.109.156216.
Liu Q, et al. Signaling Pathways From Cannabinoid Receptor-1 Activation to Inhibition of N-methyl-D-aspartic Acid Mediated Calcium Influx and Neurotoxicity in Dorsal Root Ganglion Neurons. J Pharmacol Exp Ther. 2009;331(3):1062-70. PubMed PMID: 19752241.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Signaling pathways from cannabinoid receptor-1 activation to inhibition of N-methyl-D-aspartic acid mediated calcium influx and neurotoxicity in dorsal root ganglion neurons. AU - Liu,Qing, AU - Bhat,Manjunatha, AU - Bowen,Wayne D, AU - Cheng,Jianguo, Y1 - 2009/09/14/ PY - 2009/9/16/entrez PY - 2009/9/16/pubmed PY - 2009/12/23/medline SP - 1062 EP - 70 JF - The Journal of pharmacology and experimental therapeutics JO - J. Pharmacol. Exp. Ther. VL - 331 IS - 3 N2 - Although the activation of cannabinoid receptor-1 (CB1) receptors by cannabinoids is known to inhibit neuronal hyperexcitability and reduce excitotoxic cell death, the mechanistic links between these two actions remain elusive. We tested the hypothesis that activation of CB1 receptors inhibits N-methyl-d-aspartic acid (NMDA)-mediated calcium influx and cell death via the inositol triphosphate (IP(3)) signaling pathway in both primary dorsal root ganglia neurons and a cultured neuronal cell line (F-11 cells). These cells were pretreated with the cannabinoid agonist (R)-(+)-[2,3-dihydro-5-methyl-3-(4-morpholinylmethyl)pyrrolo[1,2,3-de)-1,4-benzoxazin-6-yl]-1-napthalenylmethanone (R-(+)-WIN 55,212-2; WIN) before exposure to NMDA. Concentrations of cytosolic calcium were measured with the ratiometric calcium indicator, Fura-2, and cell death was determined by a cell viability test. WIN dose-dependently attenuated both the calcium influx and cell death induced by NMDA. These effects were blocked by selective cannabinoid CB1 receptor antagonists N-(piperidin-1-yl)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (SR141716A) or N-(piperidin-1-yl)-5-(4-iodophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (AM251), but not CB2 receptor antagonist N-[(1S)-endo-1,3,3,-trimethylbicyclo[2.2.1]heptan-2-yl]-5-(4-chloro-3-methylphenyl)-1-(4-methyl-benzyl)-pyrazole-3-carboxamide (SR144528). It is interesting to note that a transient Ca(2+) signal was observed after the acute application of WIN. This Ca(2+) increase was blocked by a CB1 receptor antagonist AM251, IP(3) receptor antagonist 2- aminoethyl diphenylborinate, or by depleting intracellular Ca(2+) stores with the endoplasmic reticulum Ca(2+) pump inhibitor thapsigargin. Removal of extracellular Ca(2+), on the other hand, had no effect on the CB1 receptor-induced Ca(2+) increase. These data suggest that WIN triggers a cascade of events: it activates the CB1 receptor and the IP(3) signaling pathway, stimulates the release of Ca(2+) from intracellular stores, raises the cytosolic Ca(2+) levels, and inhibits the NMDA-mediated Ca(2+) influx and cell death through a process that remains to be determined. SN - 1521-0103 UR - https://www.unboundmedicine.com/medline/citation/19752241/Signaling_pathways_from_cannabinoid_receptor_1_activation_to_inhibition_of_N_methyl_D_aspartic_acid_mediated_calcium_influx_and_neurotoxicity_in_dorsal_root_ganglion_neurons_ L2 - http://jpet.aspetjournals.org/cgi/pmidlookup?view=long&pmid=19752241 DB - PRIME DP - Unbound Medicine ER -