1
|
Denmeade SR. Resolute Progress Down a Long and Winding Road Leads to the Promised Land of Prostate-Specific Membrane Antigen-Based Therapies for Prostate Cancer. J Clin Oncol 2024; 42:852-856. [PMID: 38181307 DOI: 10.1200/jco.23.02310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 10/31/2023] [Indexed: 01/07/2024] Open
|
2
|
Holeček M. Aspartic Acid in Health and Disease. Nutrients 2023; 15:4023. [PMID: 37764806 PMCID: PMC10536334 DOI: 10.3390/nu15184023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/12/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Aspartic acid exists in L- and D-isoforms (L-Asp and D-Asp). Most L-Asp is synthesized by mitochondrial aspartate aminotransferase from oxaloacetate and glutamate acquired by glutamine deamidation, particularly in the liver and tumor cells, and transamination of branched-chain amino acids (BCAAs), particularly in muscles. The main source of D-Asp is the racemization of L-Asp. L-Asp transported via aspartate-glutamate carrier to the cytosol is used in protein and nucleotide synthesis, gluconeogenesis, urea, and purine-nucleotide cycles, and neurotransmission and via the malate-aspartate shuttle maintains NADH delivery to mitochondria and redox balance. L-Asp released from neurons connects with the glutamate-glutamine cycle and ensures glycolysis and ammonia detoxification in astrocytes. D-Asp has a role in brain development and hypothalamus regulation. The hereditary disorders in L-Asp metabolism include citrullinemia, asparagine synthetase deficiency, Canavan disease, and dicarboxylic aminoaciduria. L-Asp plays a role in the pathogenesis of psychiatric and neurologic disorders and alterations in BCAA levels in diabetes and hyperammonemia. Further research is needed to examine the targeting of L-Asp metabolism as a strategy to fight cancer, the use of L-Asp as a dietary supplement, and the risks of increased L-Asp consumption. The role of D-Asp in the brain warrants studies on its therapeutic potential in psychiatric and neurologic disorders.
Collapse
Affiliation(s)
- Milan Holeček
- Department of Physiology, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, 500 03 Hradec Králové, Czech Republic
| |
Collapse
|
3
|
Tang Y, Sun L, Zhao Y, Yao J, Feng Z, Liu Z, Zhang G, Sun C. UHPLC-ESI-QE-Orbitrap-MS based metabolomics reveals the antioxidant mechanism of icaritin on mice with cerebral ischemic reperfusion. PeerJ 2023; 11:e14483. [PMID: 36643627 PMCID: PMC9838208 DOI: 10.7717/peerj.14483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/08/2022] [Indexed: 01/12/2023] Open
Abstract
Background Icaritin (ICT) has been previously demonstrated to display protective effects against cerebral ischemic reperfusion (I/R) by inhibiting oxidative stress, but the mechanism remains unclear. This study aimed to explore the mechanism from the perspective of metabolomics. Methods A mice cerebral artery occlusion/reperfusion (MCAO/R) model was explored to mimic cerebral ischemic reperfusion and protective effect of ICT was assessed by neurologic deficit scoring, infarct volume and brain water content. Ultra-high-performance liquid chromatography electrospray ionization orbitrap tandem mass spectrometry (UHPLC-ESI-QE-Orbitrap-MS) based metabolomic was performed to explore potential biomarkers. Brain tissue metabolic profiles were analyzed and metabolic biomarkers were identified through multivariate data analysis. The protein levels of Nrf2, HO-1 and HQO1 were assayed by western blot. The release of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) were detected using corresponding assay kits. Results The results showed that after ICT treatment, the neurological deficit, cerebral infarction area, brain edema and the level of MDA in brain tissue of MCAO/R mice were significantly reduced. Meanwhile, ICT enhanced the activity of SOD, CAT and GSH-Px. Western blot results confirmed that ICT up-regulated the protein levels of antioxidant-related protein including Nrf2, HO-1 and NQO1. According to the metabolomic profiling of brain tissues, clear separations were observed among the Sham, Model and ICT groups. A total of 44 biomarkers were identified, and the identified biomarkers were mainly related to linoleic acid metabolism, arachidonic acid metabolism, alanine, aspartate and glutamate metabolism, arginine biosynthesis, arginine and proline metabolism, D-glutamine and D-glutamate metabolism, taurine and hypotaurine metabolism and purine metabolism, respectively. At the same time, the inhibitory effect of ICT on arachidonic acid and linoleic acid in brain tissue, as well as the promoting effect on taurine, GABA, NAAG, may be the key factors for the anti-neurooxidative function of mice after MCAO/R injury. Conclusion Our results demonstrate that ICT has benefits for MCAO/R injury, which are partially related to the suppression of oxidative stress via stimulating the Nrf2 signaling and regulating the production of arachidonic acid, linoleic acid, taurine, GABA, NAAG in brain tissue.
Collapse
Affiliation(s)
- Yunfeng Tang
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| | - Lixin Sun
- Linyi Traditional Chinese Medicine Hospital, Linyi, Shandong Province, China
| | - Yun Zhao
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| | - Jingchun Yao
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| | - Zhong Feng
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China,School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong Province, China
| | - Zhong Liu
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| | - Guimin Zhang
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| | - Chenghong Sun
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, Shandong Province, China
| |
Collapse
|
4
|
Siow A, Kowalczyk R, Brimble MA, Harris PWR. Evolution of Peptide-Based Prostate-Specific Membrane Antigen (PSMA) Inhibitors: An Approach to Novel Prostate Cancer Therapeutics. Curr Med Chem 2021; 28:3713-3752. [PMID: 33023429 DOI: 10.2174/0929867327666201006153847] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/24/2020] [Accepted: 08/30/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Prostate cancer is one of the most common cancers worldwide, with approximately 1.1 million cases diagnosed annually. The rapid development of molecular imaging has facilitated greater structural understanding, which can help formulate novel combinations of therapeutic regimens and more accurate diagnosis, avoiding unnecessary prostate biopsies. This accumulated knowledge also provides a greater understanding of the aggressive stages of the disease and tumor recurrence. Recently, much progress has been made on developing peptidomimetic-based inhibitors as promising candidates to effectively bind to the prostate- specific membrane antigen (PSMA), which is expressed by prostate cancer cells. OBJECTIVE In this review, recent advances covering small-molecule and peptide-based PSMA inhibitors will be extensively reviewed, providing a base for the rational design of future PSMA inhibitors. METHOD Herein, the literature on selected PSMA inhibitors that have been developed from 1996 to 2020 were reviewed, emphasizing recent synthetic advances and chemical strategies whilst highlighting therapeutic potential and drawbacks of each inhibitor. RESULTS Synthesized inhibitors presented in this review demonstrate the clinical application of certain PSMA inhibitors, exhibited in vitro and in vivo. CONCLUSION This review highlights the clinical potential of PSMA inhibitors, analyzing the advantages and setbacks of the chemical synthetic methodologies utilized, setting precedence for the discovery of novel PSMA inhibitors for future clinical applications.
Collapse
Affiliation(s)
- Andrew Siow
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Private Bag: 92019, Auckland 1010, New Zealand
| | - Renata Kowalczyk
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Private Bag: 92019, Auckland 1010, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Private Bag: 92019, Auckland 1010, New Zealand
| | - Paul W R Harris
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Private Bag: 92019, Auckland 1010, New Zealand
| |
Collapse
|
5
|
Chen L, Chao Y, Cheng P, Li N, Zheng H, Yang Y. UPLC-QTOF/MS-Based Metabolomics Reveals the Protective Mechanism of Hydrogen on Mice with Ischemic Stroke. Neurochem Res 2019; 44:1950-1963. [PMID: 31236794 DOI: 10.1007/s11064-019-02829-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 05/11/2019] [Accepted: 06/11/2019] [Indexed: 12/12/2022]
Abstract
As a reductive gas, hydrogen plays an antioxidant role by selectively scavenging oxygen free radicals. It has been reported that hydrogen has protective effects against nerve damage caused by ischemia-reperfusion in stroke, but the specific mechanism is still unclear. Therefore, this study aims to investigate the protective effects of hydrogen on stroke-induced ischemia-reperfusion injury and its detailed mechanism. Two weeks after the inhalation of high concentrations (66.7%) of hydrogen, middle cerebral artery occlusion (MCAO) was induced in mice using the thread occlusion technique to establish an animal model of the focal cerebral ischemia-reperfusion. Then, a metabolomics analysis of mouse cerebral cortex tissues was first performed by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF/MS) to study the metabolic changes and protective mechanisms of hydrogen on stroke ischemia-reperfusion injury. According to the metabolomic profiling of cortex tissues, 29 different endogenous metabolites were screened, including palmitoyl-L-carnitine, citric acid, glutathione, taurine, acetyl-L-carnitine, N-acetylaspartylglutamic acid (NAAG), L-aspartic acid, lysophosphatidylcholine (LysoPC) and lysophosphatidylethanolamine (LysoPE). Through pathway analysis, the metabolic pathways were concentrate on the glutathione pathway and the taurine pathway, mitochondrial energy metabolism and phospholipid metabolism that related to the oxidative stress process. This result reveals that hydrogen may protect against ischemic stroke by reducing oxidative stress during ischemia-reperfusion, thereby protecting nerve cells from reactive oxygen species(ROS).
Collapse
Affiliation(s)
- Lilin Chen
- College of Basic Medicine, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Yufan Chao
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Pengchao Cheng
- College of Basic Medicine, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Na Li
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Hongnan Zheng
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, 710032, Shaanxi, People's Republic of China.
| | - Yajuan Yang
- Department of Nursing, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, People's Republic of China.
| |
Collapse
|
6
|
Neurometabolite changes in patients with complex regional pain syndrome using magnetic resonance spectroscopy: a pilot study. Neuroreport 2019; 30:108-112. [PMID: 30507760 DOI: 10.1097/wnr.0000000000001168] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to investigate distinct neurometabolites in the right and left thalamus and insula of patients with complex regional pain syndrome (CRPS) compared with healthy controls using proton magnetic resonance spectroscopy. Levels of N-acetylaspartate (NAA), N-acetylaspartylglutamate (NAAG), myo-inositol (ml), glutamine (Gln), glycerophosphocholine (GPC), glutathione (GSH), and alanine (Ala) relative to total creatine (tCr) levels, including creatine and phosphocreatine, were determined in the right and left thalamus and insula in 12 patients with CRPS compared with 11 healthy controls using magnetic resonance spectroscopy. Levels of NAAG/tCr and Ala/tCr were higher in patients with CRPS than in controls in the left thalamus. NAAG/tCr, ml/tCr, and Gln/tCr levels were higher but NAA/tCr levels were lower in the right insula of patients with CRPS compared with controls. There were negative correlations between GSH/tCr and pain score (McGill Pain Questionnaire) in the left thalamus. These findings are paramount to understand and determine all aspects of the complex pathophysiological mechanisms that underlie CRPS, including involvement of the central and parasympathetic nervous systems as well as oxidative stress and antioxidants. Thus, the distinct metabolites presented herein may be essential to understand a strong diagnostic and prognostic potential for CRPS and to develop effective medical treatments.
Collapse
|
7
|
Evans JC, Malhotra M, Cryan JF, O'Driscoll CM. The therapeutic and diagnostic potential of the prostate specific membrane antigen/glutamate carboxypeptidase II (PSMA/GCPII) in cancer and neurological disease. Br J Pharmacol 2016; 173:3041-3079. [PMID: 27526115 PMCID: PMC5056232 DOI: 10.1111/bph.13576] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/08/2016] [Accepted: 07/25/2016] [Indexed: 12/11/2022] Open
Abstract
Prostate specific membrane antigen (PSMA) otherwise known as glutamate carboxypeptidase II (GCPII) is a membrane bound protein that is highly expressed in prostate cancer and in the neovasculature of a wide variety of tumours including glioblastomas, breast and bladder cancers. This protein is also involved in a variety of neurological diseases including schizophrenia and ALS. In recent years, there has been a surge in the development of both diagnostics and therapeutics that take advantage of the expression and activity of PSMA/GCPII. These include gene therapy, immunotherapy, chemotherapy and radiotherapy. In this review, we discuss the biological roles that PSMA/GCPII plays, both in normal and diseased tissues, and the current therapies exploiting its activity that are at the preclinical stage. We conclude by giving an expert opinion on the future direction of PSMA/GCPII based therapies and diagnostics and hurdles that need to be overcome to make them effective and viable.
Collapse
Affiliation(s)
- James C Evans
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - Meenakshi Malhotra
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - John F Cryan
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | | |
Collapse
|
8
|
Role of glutamate receptors and glial cells in the pathophysiology of treatment-resistant depression. Prog Neuropsychopharmacol Biol Psychiatry 2016; 70:117-26. [PMID: 27046518 DOI: 10.1016/j.pnpbp.2016.03.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/27/2016] [Accepted: 03/29/2016] [Indexed: 02/07/2023]
Abstract
Treatment-resistant depression (TRD) causes substantial socioeconomic burden. Although a consensus on the definition of TRD has not yet been reached, it is certain that classic monoaminergic antidepressants are ineffective for TRD. One decade ago, many researchers found ketamine, an N-methyl-d-aspartate receptor (NMDAR) antagonist, to be an alternative to classic monoaminergic antidepressants. The major mechanisms of action of ketamine rapidly induce synaptogenesis in the brain-derived neurotrophic factor (BDNF) pathway. Although excessive glutamatergic neurotransmission and consequent excitotoxicity were considered a major cause of TRD, recent evidence suggests that the extrasynaptic glutamatergic receptor signal pathway mainly contributes to the detrimental effects of TRD. Glial cells such as microglia and astrocytes, early life adversity, and glucocorticoid receptor dysfunction participate in complex cross-talk. An appropriate reuptake of glutamate at the astrocyte is crucial for preventing 'spill-over' of synaptic glutamate and binding to the extrasynaptic NMDA receptor. Excessive microglial activation and the inflammatory process cause astrocyte glutamatergic dysfunction, which in turn activates microglial function. Early life adversity and glucocorticoid receptor dysfunction result in vulnerability to stress in adulthood. A maladaptive response to stress leads to increased glutamatergic release and pro-inflammatory cytokines, which then activate microglia. However, since the role of inflammatory mediators such as pro-inflammatory cytokines is not specific for depression, more disease-specific mechanisms should be identified. Last, although much research has focused on ketamine as an alternative antidepressant for TRD, its long-lasting effectiveness and adverse events have not been rigorously demonstrated. Additionally, evidence suggests that substantial brain abnormalities develop in ketamine abusers. Thus, more investigations for ketamine and other novel glutamatergic agents are needed.
Collapse
|
9
|
Novakova Z, Wozniak K, Jancarik A, Rais R, Wu Y, Pavlicek J, Ferraris D, Havlinova B, Ptacek J, Vavra J, Hin N, Rojas C, Majer P, Slusher BS, Tsukamoto T, Barinka C. Unprecedented Binding Mode of Hydroxamate-Based Inhibitors of Glutamate Carboxypeptidase II: Structural Characterization and Biological Activity. J Med Chem 2016; 59:4539-50. [PMID: 27074627 DOI: 10.1021/acs.jmedchem.5b01806] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Inhibition of glutamate carboxypeptidase II (GCPII) is effective in preclinical models of neurological disorders associated with excessive activation of glutamatergic systems. Here we report synthesis, structural characterization, and biological activity of new hydroxamic acid-based inhibitors with nanomolar affinity for human GCPII. Crystal structures of GCPII/hydroxamate complexes revealed an unprecedented binding mode in which the putative P1' glutarate occupies the spacious entrance funnel rather than the conserved glutamate-binding S1' pocket. This unique binding mode provides a mechanistic explanation for the structure-activity relationship data, most notably the lack of enantiospecificity and the tolerance for bulky/hydrophobic functions as substituents of a canonical glutarate moiety. The in vivo pharmacokinetics profile of one of the inhibitors will be presented along with analgesic efficacy data from the rat chronic constrictive injury model of neuropathic pain.
Collapse
Affiliation(s)
- Zora Novakova
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV , Prumyslova 595, 252 50 Vestec, Czech Republic
| | | | - Andrej Jancarik
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | | | | | - Jiri Pavlicek
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV , Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Dana Ferraris
- Department of Chemistry, McDaniel College , 2 College Hill, Westminster, Maryland 21157, United States
| | - Barbora Havlinova
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV , Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Jakub Ptacek
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV , Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Jan Vavra
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | | | | | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | | | | | - Cyril Barinka
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV , Prumyslova 595, 252 50 Vestec, Czech Republic
| |
Collapse
|
10
|
Cao Y, Gao Y, Xu S, Bao J, Lin Y, Luo X, Wang Y, Luo Q, Jiang J, Neale JH, Zhong C. Glutamate carboxypeptidase II gene knockout attenuates oxidative stress and cortical apoptosis after traumatic brain injury. BMC Neurosci 2016; 17:15. [PMID: 27091009 PMCID: PMC4836105 DOI: 10.1186/s12868-016-0251-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/13/2016] [Indexed: 12/15/2022] Open
Abstract
Background Glutamate carboxypeptidase II (GCPII) inactivates the peptide co-transmitter N-acetylaspartylglutamate following synaptic release. Inhibition of GCPII elevates extracellular levels of the peptide, inhibits glutamate release and is neuroprotective in an animal model of traumatic brain injury. GCPII gene knockout mice were used to examine the cellular mechanisms underlying the neuroprotective efficacy of this transmitter system. Results Following controlled cortical impact injury, GCPII knockout (KO) mice exhibited reduced TUNEL-positive nuclei in the contusion margin of the cerebral cortex relative to wild type mice. Impact injury reduced glutathione levels and superoxide dismutase and glutathione peroxidase activities and increased malondialdehyde. Each of these effects was moderated in KO mice relative to wild type. Similarly, the injury-induced increases in cleaved caspase-3, cytosolic cytochrome c levels and Bcl-2/Bax ratio observed in wild type mice were attenuated in the knockout mice. Conclusions These data support the hypothesis that the neuroprotective efficacy of GCPII KO in traumatic brain injury is mediated via a reduction in oxidative stress.
Collapse
Affiliation(s)
- Yang Cao
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yang Gao
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Siyi Xu
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Jingang Bao
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yingying Lin
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Xingguang Luo
- Department of Psychiatry, Yale University, School of Medicine, West Haven, CT, 06516, USA
| | - Yong Wang
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Qizhong Luo
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Jiyao Jiang
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Joseph H Neale
- Department of Biology, Georgetown University, Washington, DC, 20075, USA
| | - Chunlong Zhong
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
| |
Collapse
|
11
|
Khacho P, Wang B, Bergeron R. The Good and Bad Sides of NAAG. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2016; 76:311-49. [PMID: 27288081 DOI: 10.1016/bs.apha.2016.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Why has such a small peptide been the source of controversy in neuroscience over the last 5 decades? Is N-acetyl-aspartyl-glutamate (NAAG) a neurotransmitter? Is NAAG located in neuronal tissue or in astrocytes? Is NAAG involved in neuropsychiatric and neurodegenerative disorders? Is NAAG therapeutically beneficial in the treatment of stroke or in initiating cascades of events leading to psychosis? After many years of intense research there is no clear consensus within the scientific community on how NAAG behaves in the brain. One of the major controversies about NAAG is its physiological action at N-methyl-d-aspartate (NMDA) receptors. While some researchers strongly argue that NAAG acts as a weak agonist at NMDA receptors, others have suggested that NAAG could behave as a potent antagonist. Published data from our laboratory demonstrate that the effect of NAAG on NMDA receptors could be influenced by a number of factors including the subcellular localization and subunit composition of NMDA receptors, as well as protons. In this chapter, we will summarize the knowledge of the literature on NAAG, however, we will place emphasis on our recently published data. More specifically, we have reported interesting findings on the effects of NAAG on NMDA receptors at synaptic and extrasynaptic sites using a pharmacological paradigm to distinguish the two populations of NMDA receptors. Additionally, we have evaluated the role of NAAG on GluN2A- and GluN2B-containing NMDA receptors using a HEK293 cell recombinant system. Finally, we have studied the effects of NAAG on GluN2A- and GluN2B-containing NMDA receptors in different extracellular pH conditions. We believe that our findings could potentially resolve some aspects of the debate regarding the role of NAAG at NMDA receptors.
Collapse
Affiliation(s)
- P Khacho
- University of Ottawa, Ottawa, ON, Canada
| | - B Wang
- University of Ottawa, Ottawa, ON, Canada
| | - R Bergeron
- University of Ottawa, Ottawa, ON, Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada.
| |
Collapse
|
12
|
Still NAAG’ing After All These Years. NEUROPSYCHOPHARMACOLOGY: A TRIBUTE TO JOSEPH T. COYLE 2016; 76:215-55. [DOI: 10.1016/bs.apha.2016.01.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
13
|
N -acetyl-aspartyl-glutamate and inhibition of glutamate carboxypeptidases protects against soman-induced neuropathology. Neurotoxicology 2015; 48:180-91. [DOI: 10.1016/j.neuro.2015.03.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 02/26/2015] [Accepted: 03/13/2015] [Indexed: 12/31/2022]
|
14
|
Gao Y, Xu S, Cui Z, Zhang M, Lin Y, Cai L, Wang Z, Luo X, Zheng Y, Wang Y, Luo Q, Jiang J, Neale JH, Zhong C. Mice lacking glutamate carboxypeptidase II develop normally, but are less susceptible to traumatic brain injury. J Neurochem 2015; 134:340-53. [PMID: 25872793 DOI: 10.1111/jnc.13123] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 04/04/2015] [Accepted: 04/08/2015] [Indexed: 11/26/2022]
Affiliation(s)
- Yang Gao
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Siyi Xu
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Zhenwen Cui
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Mingkun Zhang
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Yingying Lin
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Lei Cai
- Shanghai Research Center for Model Organisms; Shanghai China
| | - Zhugang Wang
- Shanghai Research Center for Model Organisms; Shanghai China
| | - Xingguang Luo
- Department of Psychiatry; Yale University School of Medicine; West Haven Connecticut USA
| | - Yan Zheng
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Yong Wang
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Qizhong Luo
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Jiyao Jiang
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Joseph H. Neale
- Department of Biology; Georgetown University; Washington DC USA
| | - Chunlong Zhong
- Department of Neurosurgery; Ren Ji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| |
Collapse
|