PMID- 32477178 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 1664-0640 (Print) IS - 1664-0640 (Electronic) IS - 1664-0640 (Linking) VI - 11 DP - 2020 TI - Glycine Signaling in the Framework of Dopamine-Glutamate Interaction and Postsynaptic Density. Implications for Treatment-Resistant Schizophrenia. PG - 369 LID - 10.3389/fpsyt.2020.00369 [doi] LID - 369 AB - Treatment-resistant schizophrenia (TRS) or suboptimal response to antipsychotics affects almost 30% of schizophrenia (SCZ) patients, and it is a relevant clinical issue with significant impact on the functional outcome and on the global burden of disease. Among putative novel treatments, glycine-centered therapeutics (i.e. sarcosine, glycine itself, D-Serine, and bitopertin) have been proposed, based on a strong preclinical rationale with, however, mixed clinical results. Therefore, a better appraisal of glycine interaction with the other major players of SCZ pathophysiology and specifically in the framework of dopamine - glutamate interactions is warranted. New methodological approaches at cutting edge of technology and drug discovery have been applied to study the role of glycine in glutamate signaling, both at presynaptic and post-synaptic level and have been instrumental for unveiling the role of glycine in dopamine-glutamate interaction. Glycine is a non-essential amino acid that plays a critical role in both inhibitory and excitatory neurotransmission. In caudal areas of central nervous system (CNS), such as spinal cord and brainstem, glycine acts as a powerful inhibitory neurotransmitter through binding to its receptor, i.e. the Glycine Receptor (GlyR). However, glycine also works as a co-agonist of the N-Methyl-D-Aspartate receptor (NMDAR) in excitatory glutamatergic neurotransmission. Glycine concentration in the synaptic cleft is finely tuned by glycine transporters, i.e. GlyT1 and GlyT2, that regulate the neurotransmitter's reuptake, with the first considered a highly potential target for psychosis therapy. Reciprocal regulation of dopamine and glycine in forebrain, glycine modulation of glutamate, glycine signaling interaction with postsynaptic density proteins at glutamatergic synapse, and human genetics of glycinergic pathways in SCZ are tackled in order to highlight the exploitation of this neurotransmitters and related molecules in SCZ and TRS. CI - Copyright (c) 2020 de Bartolomeis, Manchia, Marmo, Vellucci, Iasevoli and Barone. FAU - de Bartolomeis, Andrea AU - de Bartolomeis A AD - Laboratory of Molecular Psychiatry and Translational Psychiatry, Unit of Treatment Resistant Psychosis, Section of Psychiatry, Department of Neuroscience, Reproductive Science and Odontostomatology, University School of Medicine of Napoli Federico II, Naples, Italy. FAU - Manchia, Mirko AU - Manchia M AD - Section of Psychiatry, Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy. AD - Department of Pharmacology, Dalhousie University, Halifax, NS, Canada. FAU - Marmo, Federica AU - Marmo F AD - Laboratory of Molecular Psychiatry and Translational Psychiatry, Unit of Treatment Resistant Psychosis, Section of Psychiatry, Department of Neuroscience, Reproductive Science and Odontostomatology, University School of Medicine of Napoli Federico II, Naples, Italy. FAU - Vellucci, Licia AU - Vellucci L AD - Laboratory of Molecular Psychiatry and Translational Psychiatry, Unit of Treatment Resistant Psychosis, Section of Psychiatry, Department of Neuroscience, Reproductive Science and Odontostomatology, University School of Medicine of Napoli Federico II, Naples, Italy. FAU - Iasevoli, Felice AU - Iasevoli F AD - Laboratory of Molecular Psychiatry and Translational Psychiatry, Unit of Treatment Resistant Psychosis, Section of Psychiatry, Department of Neuroscience, Reproductive Science and Odontostomatology, University School of Medicine of Napoli Federico II, Naples, Italy. FAU - Barone, Annarita AU - Barone A AD - Laboratory of Molecular Psychiatry and Translational Psychiatry, Unit of Treatment Resistant Psychosis, Section of Psychiatry, Department of Neuroscience, Reproductive Science and Odontostomatology, University School of Medicine of Napoli Federico II, Naples, Italy. LA - eng PT - Journal Article PT - Review DEP - 20200514 PL - Switzerland TA - Front Psychiatry JT - Frontiers in psychiatry JID - 101545006 PMC - PMC7240307 OTO - NOTNLM OT - Homer OT - N-methyl-d-aspartate OT - PSD-95 OT - antipsychotics OT - disk-1 OT - dopamine OT - glutamate OT - glycine transporter 1 EDAT- 2020/06/02 06:00 MHDA- 2020/06/02 06:01 PMCR- 2020/05/14 CRDT- 2020/06/02 06:00 PHST- 2020/01/22 00:00 [received] PHST- 2020/04/14 00:00 [accepted] PHST- 2020/06/02 06:00 [entrez] PHST- 2020/06/02 06:00 [pubmed] PHST- 2020/06/02 06:01 [medline] PHST- 2020/05/14 00:00 [pmc-release] AID - 10.3389/fpsyt.2020.00369 [doi] PST - epublish SO - Front Psychiatry. 2020 May 14;11:369. doi: 10.3389/fpsyt.2020.00369. eCollection 2020.