PMID- 27323834 OWN - NLM STAT- MEDLINE DCOM- 20180205 LR - 20220408 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 34 DP - 2016 Aug 23 TI - Endocannabinoid control of glutamate NMDA receptors: the therapeutic potential and consequences of dysfunction. PG - 55840-55862 LID - 10.18632/oncotarget.10095 [doi] AB - Glutamate is probably the most important excitatory neurotransmitter in the brain. The glutamate N-methyl-D-aspartate receptor (NMDAR) is a calcium-gated channel that coordinates with G protein-coupled receptors (GPCRs) to establish the efficiency of the synaptic transmission. Cross-regulation between these receptors requires the concerted activity of the histidine triad nucleotide-binding protein 1 (HINT1) and of the sigma receptor type 1 (sigma1R). Essential brain functions like learning, memory formation and consolidation, mood and behavioral responses to exogenous stimuli depend on the activity of NMDARs. In this biological context, endocannabinoids are released to retain NMDAR activity within physiological limits. The efficacy of such control depends on HINT1/sigma1R assisting in the physical coupling between cannabinoid type 1 receptors (CB1Rs) and NMDARs to dampen their activity. Subsequently, the calcium-regulated HINT1/sigma1R protein tandem uncouples CB1Rs to prevent NMDAR hypofunction. Thus, early recruitment or a disproportionate cannabinoid induced response can bring about excess dampening of NMDAR activity, impeding its adequate integration with GPCR signaling. Alternatively, this control circuit can apparently be overridden in situations where bursts of NMDAR overactivity provoke convulsive syndromes. In this review we will discuss the possible relevance of the HINT1/sigma1R tandem and its use by endocannabinoids to diminish NMDAR activity and their implications in psychosis/schizophrenia, as well as in NMDAR-mediated convulsive episodes. FAU - Rodriguez-Munoz, Maria AU - Rodriguez-Munoz M AD - Department of Molecular, Cellular and Developmental Neurobiology, Laboratory of Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid, Spain. FAU - Sanchez-Blazquez, Pilar AU - Sanchez-Blazquez P AD - Department of Molecular, Cellular and Developmental Neurobiology, Laboratory of Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid, Spain. FAU - Merlos, Manuel AU - Merlos M AD - Drug Discovery & Preclinical Development, Esteve, Barcelona, Spain. FAU - Garzon-Nino, Javier AU - Garzon-Nino J AD - Department of Molecular, Cellular and Developmental Neurobiology, Laboratory of Neuropharmacology, Instituto Cajal, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid, Spain. LA - eng PT - Journal Article PT - Review PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (Cannabinoids) RN - 0 (Endocannabinoids) RN - 0 (Receptor, Cannabinoid, CB1) RN - 0 (Receptors, G-Protein-Coupled) RN - 0 (Receptors, N-Methyl-D-Aspartate) SB - IM MH - Animals MH - Cannabinoids/therapeutic use MH - Endocannabinoids/*physiology MH - Epilepsy/drug therapy/physiopathology MH - Humans MH - Receptor Cross-Talk MH - Receptor, Cannabinoid, CB1/physiology MH - Receptors, G-Protein-Coupled/physiology MH - Receptors, N-Methyl-D-Aspartate/*physiology MH - Schizophrenia/drug therapy PMC - PMC5342457 OTO - NOTNLM OT - GPCR-NMDAR coordination OT - HINT1 protein OT - convulsive disorders OT - mood disorders OT - sigma1R COIS- CONFLICTS OF INTEREST The authors have no conflicts of interest to declare. EDAT- 2016/06/22 06:00 MHDA- 2018/02/06 06:00 PMCR- 2016/08/23 CRDT- 2016/06/22 06:00 PHST- 2016/01/22 00:00 [received] PHST- 2016/06/06 00:00 [accepted] PHST- 2016/06/22 06:00 [pubmed] PHST- 2018/02/06 06:00 [medline] PHST- 2016/06/22 06:00 [entrez] PHST- 2016/08/23 00:00 [pmc-release] AID - 10095 [pii] AID - 10.18632/oncotarget.10095 [doi] PST - ppublish SO - Oncotarget. 2016 Aug 23;7(34):55840-55862. doi: 10.18632/oncotarget.10095.