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Sides TR, Nelson JC, Nwachukwu KN, Boston J, Marshall SA. The Influence of Arsenic Co-Exposure in a Model of Alcohol-Induced Neurodegeneration in C57BL/6J Mice. Brain Sci 2023; 13:1633. [PMID: 38137081 PMCID: PMC10741530 DOI: 10.3390/brainsci13121633] [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: 10/19/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 12/24/2023] Open
Abstract
Both excessive alcohol consumption and exposure to high levels of arsenic can lead to neurodegeneration, especially in the hippocampus. Co-exposure to arsenic and alcohol can occur because an individual with an Alcohol Use Disorder (AUD) is exposed to arsenic in their drinking water or food or because of arsenic found directly in alcoholic beverages. This study aims to determine if co-exposure to alcohol and arsenic leads to worse outcomes in neurodegeneration and associated mechanisms that could lead to cell death. To study this, mice were exposed to a 10-day gavage model of alcohol-induced neurodegeneration with varying doses of arsenic (0, 0.005, 2.5, or 10 mg/kg). The following were examined after the last dose of ethanol: (1) microglia activation assessed via immunohistochemical detection of Iba-1, (2) reactive oxygen and nitrogen species (ROS/RNS) using a colorimetric assay, (3) neurodegeneration using Fluoro-Jade® C staining (FJC), and 4) arsenic absorption using ICP-MS. After exposure, there was an additive effect of the highest dose of arsenic (10 mg/kg) in the dentate gyrus of alcohol-induced FJC+ cells. This additional cell loss may have been due to the observed increase in microglial reactivity or increased arsenic absorption following co-exposure to ethanol and arsenic. The data also showed that arsenic caused an increase in CYP2E1 expression and ROS/RNS production in the hippocampus which could have independently contributed to increased neurodegeneration. Altogether, these findings suggest a potential cyclical impact of co-exposure to arsenic and ethanol as ethanol increases arsenic absorption but arsenic also enhances alcohol's deleterious effects in the CNS.
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Affiliation(s)
- Tori R. Sides
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA; (T.R.S.); (J.C.N.); (K.N.N.); (J.B.)
| | - James C. Nelson
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA; (T.R.S.); (J.C.N.); (K.N.N.); (J.B.)
| | - Kala N. Nwachukwu
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA; (T.R.S.); (J.C.N.); (K.N.N.); (J.B.)
- Integrated Biosciences PhD Program, North Carolina Central University, Durham, NC 27707, USA
| | - Jhana Boston
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA; (T.R.S.); (J.C.N.); (K.N.N.); (J.B.)
| | - S. Alex Marshall
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA; (T.R.S.); (J.C.N.); (K.N.N.); (J.B.)
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Mazzitelli M, Presto P, Antenucci N, Meltan S, Neugebauer V. Recent Advances in the Modulation of Pain by the Metabotropic Glutamate Receptors. Cells 2022; 11:2608. [PMID: 36010684 PMCID: PMC9406805 DOI: 10.3390/cells11162608] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 01/22/2023] Open
Abstract
Metabotropic glutamate receptors (mGluR or mGlu) are G-protein coupled receptors activated by the binding of glutamate, the main classical neurotransmitter of the nervous system. Eight different mGluR subtypes (mGluR1-8) have been cloned and are classified in three groups based on their molecular, pharmacological and signaling properties. mGluRs mediate several physiological functions such as neuronal excitability and synaptic plasticity, but they have also been implicated in numerous pathological conditions including pain. The availability of new and more selective allosteric modulators together with the canonical orthosteric ligands and transgenic technologies has led to significant advances in our knowledge about the role of the specific mGluR subtypes in the pathophysiological mechanisms of various diseases. Although development of successful compounds acting on mGluRs for clinical use has been scarce, the subtype-specific-pharmacological manipulation might be a compelling approach for the treatment of several disorders in humans, including pain; this review aims to summarize and update on preclinical evidence for the roles of different mGluRs in the pain system and discusses knowledge gaps regarding mGluR-related sex differences and neuroimmune signaling in pain.
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Affiliation(s)
- Mariacristina Mazzitelli
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Peyton Presto
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Nico Antenucci
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Shakira Meltan
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Volker Neugebauer
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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Abstract
Alcohol use disorder (AUD) is a highly prevalent but severely under-treated disorder, with only three widely-approved pharmacotherapies. Given that AUD is a very heterogeneous disorder, it is unlikely that one single medication will be effective for all individuals with an AUD. As such, there is a need to develop new, more effective, and diverse pharmacological treatment options for AUD with the hopes of increasing utilization and improving care. In this qualitative literature review, we discuss the efficacy, mechanism of action, and tolerability of approved, repurposed, and novel pharmacotherapies for the treatment of AUD with a clinical perspective. Pharmacotherapies discussed include: disulfiram, acamprosate, naltrexone, nalmefene, topiramate, gabapentin, varenicline, baclofen, sodium oxybate, aripiprazole, ondansetron, mifepristone, ibudilast, suvorexant, prazosin, doxazosin, N-acetylcysteine, GET73, ASP8062, ABT-436, PF-5190457, and cannabidiol. Overall, many repurposed and novel agents discussed in this review demonstrate clinical effectiveness and promise for the future of AUD treatment. Importantly, these medications also offer potential improvements towards the advancement of precision medicine and personalized treatment for the heterogeneous AUD population. However, there remains a great need to improve access to treatment, increase the menu of approved pharmacological treatments, and de-stigmatize and increase treatment-seeking for AUD.
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An inpatient human laboratory study assessing the safety and tolerability, pharmacokinetics, and biobehavioral effect of GET 73 when co-administered with alcohol in individuals with alcohol use disorder. Psychopharmacology (Berl) 2022; 239:35-46. [PMID: 34731268 PMCID: PMC8865311 DOI: 10.1007/s00213-021-06008-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 10/08/2021] [Indexed: 12/17/2022]
Abstract
RATIONALE Previous work suggests that GET 73, a novel compound with putative activity on the metabotropic glutamate receptor subtype 5 (mGluR5), may represent a novel pharmacological treatment for alcohol use disorder (AUD). OBJECTIVE In this study, we investigated the safety, tolerability, pharmacokinetics, and biobehavioral effects of GET 73, when co-administered with alcohol, in individuals with alcohol dependence (AD). METHODS This was an inpatient, cross-over, randomized, double-blind, placebo-controlled, human laboratory study with non-treatment-seeking, alcohol-dependent individuals. The study used a within-subject design, with two counterbalanced stages, during which participants received GET 73 and then placebo, or vice versa. During each stage, participants underwent an alcohol interaction session and, on a separate day, an alcohol cue reactivity, followed by an alcohol self-administration session. RESULTS Safety outcomes of GET 73 were excellent with no serious adverse events, nor adverse events of severe grade. The co-administration of alcohol and GET 73 did not affect the pharmacokinetics of GET 73 or alcohol. GET 73, compared to placebo, did not affect the alcohol-related stimulation effects, but increased the subjective sedative effects of alcohol. GET 73 did not affect alcohol cue-induced craving, or alcohol self-administration in the laboratory. CONCLUSIONS The study confirms the safety and tolerability of GET 73 when co-administered with alcohol. Although, under this experimental condition, we did not detect an effect on alcohol craving and consumption in the laboratory, additional studies should be conducted administering GET 73 for an extended period in an outpatient setting.
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Qiao X, Sun M, Chen Y, Jin W, Zhao H, Zhang W, Lai J, Yan H. Ethanol-Induced Neuronal and Cognitive/Emotional Impairments are Accompanied by Down-Regulated NT3-TrkC-ERK in Hippocampus. Alcohol Alcohol 2021; 56:220-229. [PMID: 33103180 DOI: 10.1093/alcalc/agaa101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 11/14/2022] Open
Abstract
AIMS Ethanol ingestion affects cognition and emotion, which have been attributed to the dysfunction of specific brain structures. Studies of alcoholic patients and animal models consistently identify reduced hippocampal mass as a key ethanol-induced brain adaptation. This study evaluated how neuroadaptation in the hippocampus (Hip) produced by ethanol contributed to related behavioral deficits in male and female rats. METHODS Effects of acute, short-term and long-term ethanol exposure on the anxiety-like behavior and recognition memory on adult male and female Sprague-Dawley rats were assessed using elevated plus maze test and novel object recognition test, respectively. In addition, in order to investigate the direct effect of ethanol on hippocampal neurons, primary culture of hippocampal neurons was exposed to ethanol (10, 30 and 90 mM; 1, 24 and 48 h), and viability (CCK-8) and morphology (immunocytochemistry) were analyzed at structural levels. Western blot assays were used to assess protein levels of NT3-TrkC-ERK. RESULTS Acute and short-term ethanol exposure exerted anxiolytic effects, whereas long-term ethanol exposure induced anxiogenic responses in both sexes. Short-term ethanol exposure impaired spatial memory only in female rats, whereas long-term ethanol exposure impaired spatial and recognition memory in both sexes. These behavioral impairments and ethanol-induced loss of hippocampal neurons and decreased cell viability were accompanied by downregulated NT3-TrkC-ERK pathway. CONCLUSION These results indicate that NT3-TrkC-ERK signaling in the Hip may play an important role in ethanol-induced structural and behavioral impairments.
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Affiliation(s)
- Xiaomeng Qiao
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
| | - Mizhu Sun
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
| | - Yuanyuan Chen
- Department of Forensic Biology, College of Forensic Science, School of Medicine, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Wenyang Jin
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
| | - Huan Zhao
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
| | - Weiqi Zhang
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
| | - Jianghua Lai
- Department of Forensic Biology, College of Forensic Science, School of Medicine, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Hongtao Yan
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, No.100, Science Avenue, Zhengzhou, Henan, 450001, China
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Jin W, Sun M, Yuan B, Wang R, Yan H, Qiao X. Neuroprotective Effects of Grape Seed Procyanidins on Ethanol-Induced Injury and Oxidative Stress in Rat Hippocampal Neurons. Alcohol Alcohol 2020; 55:357-366. [DOI: 10.1093/alcalc/agaa031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/25/2020] [Accepted: 04/04/2020] [Indexed: 12/14/2022] Open
Abstract
Abstract
Aims
Ethanol is a small molecule capable of interacting with numerous targets in the brain, the mechanisms of which are complex and still poorly understood. Studies have revealed that ethanol-induced hippocampal neuronal injury is associated with oxidative stress. Grape seed procyanidin (GSP) is a new type of antioxidant that is believed to scavenge free radicals and be anti-inflammatory. This study evaluated the ability and mechanism by which the GSP improves ethanol-induced hippocampal neuronal injury.
Methods
Primary cultures of hippocampal neurons were exposed to ethanol (11, 33 and 66 mM, 1, 4, 8, 12 and 24 h) and the neuroprotective effects of GSP were assessed by evaluating the activity of superoxide dismutase (SOD), the levels of malondialdehyde (MDA) and lactate dehydrogenase (LDH) and cell morphology.
Results
Our results indicated that GSP prevented ethanol-induced neuronal injury by reducing the levels of MDA and LDH, while increasing the activity of SOD. In addition, GSP increased the number of primary dendrites and total dendritic length per cell.
Conclusion
Together with previous findings, these results lend further support to the significance of developing GSP as a therapeutic tool for use in the treatment of alcohol use disorders.
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Affiliation(s)
- Wenyang Jin
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Mizhu Sun
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Bingbing Yuan
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Runzhi Wang
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Hongtao Yan
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaomeng Qiao
- Department of Forensic Medicine, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
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Pérez MJ, Loyola R, Canelo F, Aranguiz A, Tapia-Monsalves C, Osorio-Fuentealba C, Quintanilla RA. NADPH oxidase contributes to oxidative damage and mitochondrial impairment induced by acute ethanol treatment in rat hippocampal neurons. Neuropharmacology 2020; 171:108100. [PMID: 32289339 DOI: 10.1016/j.neuropharm.2020.108100] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 03/30/2020] [Accepted: 04/05/2020] [Indexed: 12/26/2022]
Abstract
Acute ethanol treatment induces neurodegeneration in cultured neurons and can lead to brain damage in animal models. Neuronal cells exposed to ethanol showed an increase in reactive oxygen species (ROS), oxidative damage and mitochondrial impairment contributing to synaptic failure. However, the underlying mechanisms of these events are not well understood. Here, we studied the contribution of NADPH oxidase, as a relevant source of ROS production in the brain, to mitochondrial impairment and oxidative stress induced by ethanol. We used primary hippocampal neurons subjected to an acute treatment of ethanol at increasing concentrations (25, 50, and 75 mM, 24 h), and we evaluated ROS production, mitochondrial function, and synaptic vesicle activity. Our studies showed that after ethanol administration, hippocampal neurons presented an increase in ROS levels, mitochondrial dysfunction, calcium handling defects, and synaptic impairment. Interestingly, treatment with the NADPH inhibitor, apocynin, significantly prevented oxidative stress, mitochondrial dysfunction, and the impairment of synaptic vesicle activity induced by ethanol treatment. These results indicate that NADPH oxidase could be a key participant in the molecular mechanism by which alcohol affects the brain.
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Affiliation(s)
- María José Pérez
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Rocío Loyola
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Francisco Canelo
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Alejandra Aranguiz
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Carola Tapia-Monsalves
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Cesar Osorio-Fuentealba
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile; Departamento de Kinesiología, Universidad Metropolitana de Ciencias de la Educación, Ñuñoa, Santiago, Chile
| | - Rodrigo A Quintanilla
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Investigaciones Biomedicas, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile.
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8
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Danshen formula granule and salvianic acid A alleviate ethanol-induced neurotoxicity. J Nat Med 2019; 74:399-408. [PMID: 31828593 DOI: 10.1007/s11418-019-01379-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/03/2019] [Indexed: 12/14/2022]
Abstract
As a direct neurotoxin, ethanol exposure is associated with nerve damage and dysfunction of central nervous system (CNS) and induced obvious neurotoxicity by increasing the reactive oxygen species (ROS) production, activation of endogenous apoptotic as well as necrotic signals, and other molecular mechanisms. The previous studies had demonstrated that natural herbal medicine offers protective effectiveness on ethanol-induced nerve cell damage. Danshen and its extracts have been known to have an antioxidant property and neuroprotective effects. However, the protective effects of Danshen formula granule and salvianic acid A on ethanol-induced neurotoxicity remain unknown. In this study, we found that the Danshen formula granule and salvianic acid A significantly inhibited the ethanol-induced cell death, blocked LDH release, and reduced dendritic spine loss. Furthermore, the intracellular ROS, MDA production, and ethanol-induced apoptosis were significantly ameliorated with Danshen formula granule and salvianic acid A pretreatment by increasing the antioxidant enzymatic activity of CAT, SOD and GSH-Px, and inhibiting apoptotic pathways. In addition, Danshen formula granule and salvianic acid A pretreatment obviously inhibit the apoptotic pathways by regulating the protein expression of Bcl-2, Bax, and Caspase-3. In conclusion, our data demonstrated that the Danshen formula granule and salvianic acid A provide a significantly protective effectiveness against ethanol-induced neurotoxicity, which might be a potential therapeutic drug for ethanol-induced neurological disorders.
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9
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Li L, Peng W, Tian X. Protective Effects and Mechanisms of MicroRNA-182 on Oxidative Stress in RHiN. Open Life Sci 2019; 14:400-409. [PMID: 33817175 PMCID: PMC7874809 DOI: 10.1515/biol-2019-0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 05/06/2019] [Indexed: 01/11/2023] Open
Abstract
To explore protective effects and related mechanisms of microRNA-182 (miR-182) on oxidative stress in rat hippocampal neurons (RHiN), RHiN cells. As the results, the survival rate and superoxide dismutase levels in H2O2 group were significantly lower than H2O2+miR-182 group (all P<0.05). The malondialdehyde levels and apoptosis rate in H2O2+miR-182 group were significantly lower than H2O2 group (all P<0.05). The mRNA levels and expression levels of mTOR and PI3K in H2O2+miR-182 group were higher than those in H2O2 group (both P<0.05). The experiment of cerebral ischemic oxidative stress model rats showed that the survival rate, apoptosis rate, malondialdehyde and superoxide dismutase levels in miR-182 group were better than model control group. The positive staining intensity of phosphoinositide 3-kinase (mTOR) and phosphoinositide 3-kinase (PI3K) in model control group were significantly lower than miR-182 group (all P<0.05). Increased levels of miR-182 can reduce the damage of H2O2 treatments in RHiN cells. Oxidative stress is decreased in the neuronal cells possibly by activation of the PI3K-AKT-mTOR pathway.
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Affiliation(s)
- Lihua Li
- Colleges of Medicine, Jishou University, Jishou, Hunan Province, P.R. China
| | - Wenna Peng
- Department of Rehabilitation Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, P.R. China
| | - Xiangrong Tian
- Biology and Environmental Sciences, Jishou University, Jishou, Hunan Province, P.R. China
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10
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Reglodi D, Toth D, Vicena V, Manavalan S, Brown D, Getachew B, Tizabi Y. Therapeutic potential of PACAP in alcohol toxicity. Neurochem Int 2019; 124:238-244. [PMID: 30682380 DOI: 10.1016/j.neuint.2019.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 12/15/2018] [Accepted: 01/21/2019] [Indexed: 12/19/2022]
Abstract
Alcohol addiction is a worldwide concern as its detrimental effects go far beyond the addicted individual and can affect the entire family as well as the community. Considerable effort is being expended in understanding the neurobiological basis of such addiction in hope of developing effective prevention and/or intervention strategies. In addition, organ damage and neurotoxicological effects of alcohol are intensely investigated. Pharmacological approaches, so far, have only provided partial success in prevention or treatment of alcohol use disorder (AUD) including the neurotoxicological consequences of heavy drinking. Pituitary adenylate cyclase-activating polypeptide (PACAP) is an endogenous 38 amino-acid neuropeptide with demonstrated protection against neuronal injury, trauma as well as various endogenous and exogenous toxic agents including alcohol. In this mini-review, following a brief presentation of alcohol addiction and its neurotoxicity, the potential of PACAP as a therapeutic intervention in toxicological consequences of this devastating disorder is discussed.
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Affiliation(s)
- Dora Reglodi
- Department of Anatomy, MTA-PTE PACAP Research Team, University of Pecs Medical School, Hungary.
| | - Denes Toth
- Department of Forensic Medicine, University of Pecs Medical School, Hungary
| | - Viktoria Vicena
- Department of Anatomy, MTA-PTE PACAP Research Team, University of Pecs Medical School, Hungary
| | - Sridharan Manavalan
- Department of Anatomy, MTA-PTE PACAP Research Team, University of Pecs Medical School, Hungary; Department of Basic Sciences, National University of Health Sciences, Florida, USA
| | - Dwayne Brown
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, USA
| | - Bruk Getachew
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, USA
| | - Yousef Tizabi
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, USA
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11
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Brenneman DE, Petkanas D, Kinney WA. Pharmacological Comparisons Between Cannabidiol and KLS-13019. J Mol Neurosci 2018; 66:121-134. [PMID: 30109468 DOI: 10.1007/s12031-018-1154-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 08/03/2018] [Indexed: 12/21/2022]
Abstract
Cannabidiol (CBD) exhibits neuroprotective properties in many experimental systems. However, development of CBD as a drug has been confounded by the following: (1) low potency; (2) a large number of molecular targets; (3) marginal pharmacokinetic properties; and (4) designation as a schedule 1 controlled substance. The present work compared the properties of CBD with a novel molecule (KLS-13019) that has structural similarities to CBD. The design strategy for KLS-13019 was to increase hydrophilicity while optimizing neuroprotective potency against oxidative stress toxicity relevant to hepatic encephalopathy. The protective responses of CBD and KLS-13019 were compared in dissociated rat hippocampal cultures co-treated with toxic levels of ethanol and ammonium acetate. This comparison revealed that KLS-13019 was 31-fold more potent than CBD in preventing neuronal toxicity from the combined toxin treatment, while both compounds exhibited complete protective efficacy back to control values. In addition, treatment with KLS-13019 alone was 5-fold less toxic (TC50) than CBD. Previous studies suggested that CBD targeted the Na+-Ca2+ exchanger in mitochondria (mNCX) to regulate intracellular calcium levels, an important determinant of neuronal survival. After treatment with an inhibitor of mNCX (CGP-37157), no detectable neuroprotection from ethanol toxicity was observed for either CBD or KLS-13019. Furthermore, AM630 (CB2 antagonist) significantly attenuated CBD-mediated neuroprotection, while having no detectable effect on neuroprotection from KLS-13019. Our studies indicated KLS-13019 was more potent and less toxic than CBD. Both compounds can act through mNCX. KLS-13019 may provide an alternative to CBD as a therapeutic candidate to treat diseases associated with oxidative stress.
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Affiliation(s)
- Douglas E Brenneman
- Advanced Neural Dynamics, Inc, Pennsylvania Biotechnology Center, 3805 Old Easton Road, Doylestown, PA, 18902, USA.
- Kannalife Sciences, Inc, Pennsylvania Biotechnology Center, Doylestown, PA, 18902, USA.
| | - Dean Petkanas
- Kannalife Sciences, Inc, Pennsylvania Biotechnology Center, Doylestown, PA, 18902, USA
| | - William A Kinney
- Kannalife Sciences, Inc, Pennsylvania Biotechnology Center, Doylestown, PA, 18902, USA
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12
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Beggiato S, Borelli AC, Tomasini MC, Castelli MP, Pintori N, Cacciaglia R, Loche A, Ferraro L. In Vitro Functional Characterization of GET73 as Possible Negative Allosteric Modulator of Metabotropic Glutamate Receptor 5. Front Pharmacol 2018; 9:327. [PMID: 29674969 PMCID: PMC5895880 DOI: 10.3389/fphar.2018.00327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/21/2018] [Indexed: 01/08/2023] Open
Abstract
The present study was aimed to further characterize the pharmacological profile of N-[4-(trifluoromethyl) benzyl]-4-methoxybutyramide (GET73), a putative negative allosteric modulator (NAM) of metabotropic glutamate subtype 5 receptor (mGluR5) under development as a novel medication for the treatment of alcohol dependence. This aim has been accomplished by means of a series of in vitro functional assays. These assays include the measure of several down-stream signaling [intracellular Ca++ levels, inositol phosphate (IP) formation and CREB phosphorylation (pCREB)] which are generally affected by mGluR5 ligands. In particular, GET73 (0.1 nM-10 μM) was explored for its ability to displace the concentration-response curve of some mGluR5 agonists/probes (glutamate, L-quisqualate, CHPG) in different native preparations. GET73 produced a rightward shift of concentration-response curves of glutamate- and CHPG-induced intracellular Ca++ levels in primary cultures of rat cortical astrocytes. The compound also induced a rightward shift of concentration response curve of glutamate- and L-quisqualate-induced increase in IP turnover in rat hippocampus slices, along with a reduction of CHPG (10 mM)-induced increase in IP formation. Moreover, GET73 produced a rightward shift of concentration-response curve of glutamate-, CHPG- and L-quisqualate-induced pCREB levels in rat cerebral cortex neurons. Although the engagement of other targets cannot be definitively ruled out, these data support the view that GET73 acts as an mGluR5 NAM and support the significance of further investigating the possible mechanism of action of the compound.
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Affiliation(s)
- Sarah Beggiato
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.,IRET Foundation, Bologna, Italy
| | - Andrea C Borelli
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.,IRET Foundation, Bologna, Italy
| | - Maria C Tomasini
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.,IRET Foundation, Bologna, Italy
| | - M Paola Castelli
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy.,Center of Excellence "Neurobiology of Addiction", University of Cagliari, Cagliari, Italy
| | - Nicholas Pintori
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | | | | | - Luca Ferraro
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.,IRET Foundation, Bologna, Italy.,LTTA Centre, University of Ferrara, Ferrara, Italy
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13
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Haass-Koffler CL, Goodyear K, Loche A, Long VM, Lobina C, Tran HH, Cacciaglia R, Swift RM, Colombo G, Leggio L. Administration of the metabotropic glutamate receptor subtype 5 allosteric modulator GET 73 with alcohol: A translational study in rats and humans. J Psychopharmacol 2018; 32:163-173. [PMID: 29361897 PMCID: PMC7014573 DOI: 10.1177/0269881117746904] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Preclinical work suggests that GET 73 (N-[4-(trifluoromethyl)benzyl]-4-methoxybutyramide), a novel metabotropic glutamate receptor subtype 5 negative allosteric modulator, may represent a novel pharmacological treatment for alcohol use disorder. Two independent experiments evaluated the effect of acutely administered GET 73 (0, 30, and 100 mg/kg, intragastrically) on alcohol-induced hypolocomotion ( n=72) and sedation/hypnosis ( n=36) in rats. In healthy male volunteers ( n=14), an open-label, randomised, crossover study was conducted to compare adverse events and pharmacokinetic parameters, in two experiments in which 300 mg GET 73 was administered, with and without alcohol, once and thrice. In rats, when administered with alcohol-vehicle, 100 mg/kg, but not 30 mg/kg, GET 73 reduced spontaneous locomotor activity. When administered with alcohol, no dose of GET 73 altered either alcohol-induced hypolocomotion or sedation/hypnosis. In humans, both single and thrice 300 mg GET 73 administration were well tolerated, in the presence and absence of alcohol, with no differences in adverse events. There were no significant differences in relative bioavailability between administering 300 mg GET 73 in the presence or absence of alcohol.
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Affiliation(s)
- Carolina L Haass-Koffler
- Center for Alcohol and Addiction Studies, Department of Psychiatry and Human Behavior, Brown University, Providence, RI, USA,Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA,Corresponding author: Carolina L Haass-Koffler, Center for Alcohol and Addiction Studies, Department Psychiatry and Human Behavior, Brown University, 121 South Main Street, Providence, RI 02912, USA;
| | - Kimberly Goodyear
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | | | - Victoria M Long
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | - Carla Lobina
- Neuroscience Institute, Section of Cagliari, National Research Council of Italy, Cagliari, Italy
| | - Harrison H Tran
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | | | - Robert M Swift
- Center for Alcohol and Addiction Studies, Department of Psychiatry and Human Behavior, Brown University, Providence, RI, USA
| | - Giancarlo Colombo
- Neuroscience Institute, Section of Cagliari, National Research Council of Italy, Cagliari, Italy
| | - Lorenzo Leggio
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
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14
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Haass-Koffler CL, Goodyear K, Long VM, Tran HH, Loche A, Cacciaglia R, Swift RM, Leggio L. A Phase I randomized clinical trial testing the safety, tolerability and preliminary pharmacokinetics of the mGluR5 negative allosteric modulator GET 73 following single and repeated doses in healthy volunteers. Eur J Pharm Sci 2017; 109:78-85. [PMID: 28778464 DOI: 10.1016/j.ejps.2017.07.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 12/13/2022]
Abstract
Preclinical work suggests that the metabotropic glutamate receptor subtype 5 (mGlu5) may represent a novel target to treat neuropsychiatric disorders, including alcohol use disorder and obesity. The goal of this first-in-man study was to evaluate the safety, tolerability and pharmacokinetics (PK) of GET 73 (PubChem SID: 329974174), a novel mGluR5 negative allosteric modulator. This was a double-blind, placebo-controlled, ascending dose, Phase I study conducted in healthy male volunteers in two experiments. GET 73 was administered as single ascending doses (N=48; Experiment 1; 10, 30, 100, 300, 450, 600-mg) or multiple ascending doses (N=32; Experiment 2; 100, 300, 450, 450-mg twice a day). Primary endpoints were the incidence of adverse events (AEs) among drug conditions and drug tolerability. The secondary endpoints were the PK parameters of GET 73 and its metabolite MET 2. Single GET 73 doses of up to 600-mg and repeated ascending doses of up to 450-mg twice/day were safe and well-tolerated. There were no serious or severe AEs. All AEs were mild or moderate in severity. Total GET 73 exposure increased with each increased GET 73 dose. A dose-related increase in mean maximum plasma drug concentration was observed after repeated dosing. Maximum plasma drug concentrations occurred between 0.5 and 2.05h after administration in all groups for both single and repeated doses. This first-in-human study indicates that GET 73, as single or multiple ascending doses, is safe and well-tolerated when administered to healthy male volunteers.
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Affiliation(s)
- Carolina L Haass-Koffler
- Center for Alcohol and Addiction Studies, Department of Psychiatry and Human Behavior, Brown University, Providence, RI, USA; Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA.
| | - Kimberly Goodyear
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | - Victoria M Long
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | - Harrison H Tran
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | | | | | - Robert M Swift
- Center for Alcohol and Addiction Studies, Department of Psychiatry and Human Behavior, Brown University, Providence, RI, USA
| | - Lorenzo Leggio
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
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