1
|
Ni M, Gui S, Fu Y, Peng Y, Ding Q. Synthesis of 2,4-Dicyanoalkylated Benzoxazines through the Radical-Mediated Cascade Cyclization of Isocyanides with AIBN under Metal- and Additive-Free Conditions. J Org Chem 2024; 89:3970-3976. [PMID: 38422048 DOI: 10.1021/acs.joc.3c02809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
A general and novel method for the radical cascade cyclization of aryl isocyanides with AIBN has been described. This strategy provides straightforward access to various 2,4-dicyanoalkylated benzoxazines in moderate to good yields under metal- and additive-free conditions. The reaction can apply to a gram scale and tolerate diverse functional groups. 2,4-Dicyanoalkylated benzoxazine derivatives feature a large Stokes shift and intramolecular charge transfer properties.
Collapse
Affiliation(s)
- Mengjia Ni
- Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Shuanggen Gui
- Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Yang Fu
- Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Yiyuan Peng
- Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Qiuping Ding
- Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| |
Collapse
|
2
|
Gammoh O, Ibrahim A, Yehya A, Alqudah A, Qnais E, Altaber S, Alrob OA, Aljabali AAA, Tambuwala MM. Exploring the Roles of Vitamins C and D and Etifoxine in Combination with Citalopram in Depression/Anxiety Model: A Focus on ICAM-1, SIRT1 and Nitric Oxide. Int J Mol Sci 2024; 25:1960. [PMID: 38396638 PMCID: PMC10889164 DOI: 10.3390/ijms25041960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/17/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
The study of intercellular adhesion molecule-1 (ICAM-1) and SIRT1, a member of the sirtuin family with nitric oxide (NO), is emerging in depression and anxiety. As with all antidepressants, the efficacy is delayed and inconsistent. Ascorbic acid (AA) and vitamin D (D) showed antidepressant properties, while etifoxine (Etx), a GABAA agonist, alleviates anxiety symptoms. The present study aimed to investigate the potential augmentation of citalopram using AA, D and Etx and related the antidepressant effect to brain and serum ICAM-1, SIRT1 and NO in an animal model. BALB/c mice were divided into naive, control, citalopram, citalopram + etx, citalopram + AA, citalopram + D and citalopram + etx + AA + D for 7 days. On the 8th day, the mice were restrained for 8 h, followed by a forced swim test and marble burying test before scarification. Whole-brain and serum expression of ICAM-1, Sirt1 and NO were determined. Citalopram's antidepressant and sedative effects were potentiated by ascorbic acid, vitamin D and etifoxine alone and in combination (p < 0.05), as shown by the decreased floating time and rearing frequency. Brain NO increased significantly (p < 0.05) in depression and anxiety and was associated with an ICAM-1 increase versus naive (p < 0.05) and a Sirt1 decrease (p < 0.05) versus naive. Both ICAM-1 and Sirt1 were modulated by antidepressants through a non-NO-dependent pathway. Serum NO expression was unrelated to serum ICAM-1 and Sirt1. Brain ICAM-1, Sirt1 and NO are implicated in depression and are modulated by antidepressants.
Collapse
Affiliation(s)
- Omar Gammoh
- Department of Clinical Pharmacy and Pharmacy, Faculty of Pharmacy, Yarmouk University, Irbid 21163, Jordan; (A.Y.); (O.A.A.)
| | - Aseel Ibrahim
- Faculty of Sciences, Yarmouk University, Irbid 21163, Jordan;
| | - Ala Yehya
- Department of Clinical Pharmacy and Pharmacy, Faculty of Pharmacy, Yarmouk University, Irbid 21163, Jordan; (A.Y.); (O.A.A.)
| | - Abdelrahim Alqudah
- Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmaceutical Sciences, The Hashemite University, Zarqa 13133, Jordan;
| | - Esam Qnais
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa 13133, Jordan; (E.Q.); (S.A.)
| | - Sara Altaber
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa 13133, Jordan; (E.Q.); (S.A.)
| | - Osama Abo Alrob
- Department of Clinical Pharmacy and Pharmacy, Faculty of Pharmacy, Yarmouk University, Irbid 21163, Jordan; (A.Y.); (O.A.A.)
| | - Alaa A. A. Aljabali
- Department of Pharmaceutics and Pharmaceutical Technology, Yarmouk University, Irbid 21163, Jordan;
| | - Murtaza M. Tambuwala
- Lincoln Medical School, Brayford Pool Campus, University of Lincoln, Lincoln LN6 7TS, UK;
| |
Collapse
|
3
|
Riban V, Meunier J, Buttigieg D, Villard V, Verleye M. In Vitro and In Vivo Neuroprotective Effects of Etifoxine in β-Amyloidinduced Toxicity Models. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2020; 19:227-240. [DOI: 10.2174/1871527319666200601151007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 11/22/2022]
Abstract
Aim:
The aim of this study is to examine the effect of etifoxine on β-amyloid-induced toxicity
models.
Background:
Etifoxine is an anxiolytic compound with a dual mechanism of action; it is a positive allosteric
modulator of GABAergic receptors as well as a ligand for the 18 kDa mitochondrial Translocator
Protein (TSPO). TSPO has recently raised interest in Alzheimer’s Disease (AD), and experimental studies
have shown that some TSPO ligands could induce neuroprotective effects in animal models.
Objective:
In this study, we examined the potential protective effect of etifoxine in an in vitro and an
in vivo model of amyloid beta (Aβ)-induced toxicity in its oligomeric form, which is a crucial factor in
AD pathologic mechanisms.
Method:
Neuronal cultures were intoxicated with Aβ1-42, and the effects of etifoxine on oxidative
stress, Tau-hyperphosphorylation and synaptic loss were quantified. In a mice model, behavioral deficits
induced by intracerebroventricular administration of Aβ25-35 were measured in a spatial memory
test, the spontaneous alternation and in a contextual memory test, the passive avoidance test.
Results:
In neuronal cultures intoxicated with Aβ1-42, etifoxine dose-dependently decreased oxidative
stress (methionine sulfoxide positive neurons), tau-hyperphosphorylation and synaptic loss (ratio
PSD95/synaptophysin). In a mice model, memory impairments were fully alleviated by etifoxine administered
at anxiolytic doses (12.5-50mg/kg). In addition, markers of oxidative stress and apoptosis
were decreased in the hippocampus of these animals.
Conclusion:
Our results have shown that in these two models, etifoxine could fully prevent neurotoxicity
and pathological changes induced by Aβ. These results confirm that TSPO ligands could offer an
interesting therapeutic approach to Alzheimer’s disease.
Collapse
Affiliation(s)
- Veronique Riban
- Pharmacology Department, Biocodex, 3 Chemin d’Armancourt, 60200 Compiegne, France
| | - Johann Meunier
- Amylgen, 2196 Boulevard de la Lironde, 34980 Montferrier sur Lez, France
| | | | - Vanessa Villard
- Amylgen, 2196 Boulevard de la Lironde, 34980 Montferrier sur Lez, France
| | - Marc Verleye
- Pharmacology Department, Biocodex, 3 Chemin d’Armancourt, 60200 Compiegne, France
| |
Collapse
|
4
|
Nuss P, Ferreri F, Bourin M. An update on the anxiolytic and neuroprotective properties of etifoxine: from brain GABA modulation to a whole-body mode of action. Neuropsychiatr Dis Treat 2019; 15:1781-1795. [PMID: 31308671 PMCID: PMC6615018 DOI: 10.2147/ndt.s200568] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 04/08/2019] [Indexed: 01/01/2023] Open
Abstract
Treating the signs and symptoms of anxiety is an everyday challenge in clinical practice. When choosing between treatment options, anxiety needs to be understood in the situational, psychiatric, and biological context in which it arises. Etifoxine, a non-benzodiazepine anxiolytic drug belonging to the benzoxazine class, is an effective treatment for anxiety in response to a stressful situation. In the present review, we focused on several aspects of the cerebral and somatic biological mechanisms involved in anxiety and investigated the extent to which etifoxine's mode of action can explain its anxiolytic activity. Its two mechanisms of action are the modulation of GABAergic neurotransmission and neurosteroid synthesis. Recent data suggest that the molecule possesses neuroprotective, neuroplastic, and anti-inflammatory properties. Etifoxine was first shown to be an effective anxiolytic in patients in clinical studies comparing it with clobazam, sulpiride, and placebo. Randomized controlled studies have demonstrated its anxiolytic efficacy in patients with adjustment disorders (ADs) with anxiety, showing it to be superior to buspirone and comparable to lorazepam and phenazepam, with a greater number of markedly improved responders and a better therapeutic index. Etifoxine's noninferiority to alprazolam has also been demonstrated in a comparative trial. Significantly less rebound anxiety was observed after abrupt cessation of etifoxine compared with lorazepam or alprazolam. Consistent with this finding, etifoxine appears to have a very low dependence potential. Unlike lorazepam, it has no effect on psychomotor performance, vigilance, or free recall. Severe adverse events are in general rare. Skin and subcutaneous disorders are the most frequently reported, but these generally resolve after drug cessation. Taken together, its dual mechanisms of action in anxiety and the positive data yielded by clinical trials support the use of etifoxine for treating the anxiety signs and symptoms of individuals with ADs.
Collapse
Affiliation(s)
- Philippe Nuss
- Department of Adult Psychiatry and Medical Psychology, Sorbonne University, Saint-Antoine Hospital, Paris, France
- Inserm UMR_S938, Saint-Antoine Research Centre, Sorbonne University, Paris, France
| | - Florian Ferreri
- Department of Adult Psychiatry and Medical Psychology, Sorbonne University, Saint-Antoine Hospital, Paris, France
| | - Michel Bourin
- Department of Neurobiology of Anxiety and Depression, Faculty of Medicine, Nantes University, Nantes, France
| |
Collapse
|
5
|
Gong D, Zhao H, Liang Y, Chao R, Chen L, Yang S, Yu P. Differences in cocaine- and morphine-induced cognitive impairments and serum corticosterone between C57BL/6J and BALB/cJ mice. Pharmacol Biochem Behav 2019; 182:1-6. [DOI: 10.1016/j.pbb.2019.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 01/17/2023]
|
6
|
Mattei C, Taly A, Soualah Z, Saulais O, Henrion D, Guérineau NC, Verleye M, Legros C. Involvement of the GABA A receptor α subunit in the mode of action of etifoxine. Pharmacol Res 2019; 145:104250. [PMID: 31059790 DOI: 10.1016/j.phrs.2019.04.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 03/21/2019] [Accepted: 04/27/2019] [Indexed: 12/31/2022]
Abstract
Etifoxine (EFX) is a non-benzodiazepine psychoactive drug which exhibits anxiolytic effects through a dual mechanism, by directly binding to GABAA receptors (GABAARs) and to the mitochondrial 18-kDa translocator protein, resulting in the potentiation of the GABAergic function. The β subunit subtype plays a key role in the EFX-GABAAR interaction, however this does not explain the anxiolytic effects of this drug. Here, we combined behavioral and electrophysiological experiments to challenge the role of the GABAAR α subunit in the EFX mode of action. After single administrations of anxiolytic doses (25-50 mg/kg, intraperitoneal), EFX did not induce any neurological nor locomotor impairments, unlike the benzodiazepine bromazepam (0.5-1 mg/kg, intraperitoneal). We established the EFX pharmacological profile on heteropentameric GABAARs constructed with α1 to α6 subunit expressed in Xenopus oocyte. Unlike what is known for benzodiazepines, neither the γ nor δ subunits influenced EFX-mediated potentiation of GABA-evoked currents. EFX acted first as a partial agonist on α2β3γ2S, α3β3γ2S, α6β3γ2S and α6β3δ GABAARs, but not on α1β3γ2S, α4β3γ2S, α4β3δ nor α5β3γ2S GABAARs. Moreover, EFX exhibited much higher positive allosteric modulation towards α2β3γ2S, α3β3γ2S and α6β3γ2S than for α1β3γ2S, α4β3γ2S and α5β3γ2S GABAARs. At 20 μM, corresponding to brain concentration at anxiolytic doses, EFX increased GABA potency to the highest extent for α3β3γ2S GABAARs. We built a docking model of EFX on α3β3γ2S GABAARs, which is consistent with a binding site located between α and β subunits in the extracellular domain. In conclusion, EFX preferentially potentiates α2β3γ2S and α3β3γ2S GABAARs, which might support its advantageous anxiolytic/sedative balance.
Collapse
Affiliation(s)
- César Mattei
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France.
| | - Antoine Taly
- Theoretical Biochemistry Laboratory, Institute of Physico-Chemical Biology, CNRS UPR9080, University of Paris Diderot Sorbonne Paris Cité, 75005 Paris, France
| | - Zineb Soualah
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France
| | - Ophélie Saulais
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France
| | - Daniel Henrion
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France
| | - Nathalie C Guérineau
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France
| | - Marc Verleye
- Biocodex, Department of Pharmacology, Zac de Mercières, 60200 Compiègne, France
| | - Christian Legros
- Institut MITOVASC, UMR CNRS 6015 - UMR INSERM U1083, Université d'Angers, 3 Rue Roger Amsler 49100 ANGERS, France.
| |
Collapse
|
7
|
Abstract
OBJECTIVES Anxiety and adjustment disorders are among the most prevalent mental health conditions. This review focuses on γ-aminobutyric acid receptor type A (GABAAR)-mediated anxiolysis, describing the action of both endogenous and exogenous modulators of GABAAR. Future directions and innovative strategies to alleviate anxiety symptoms are discussed, with a particular emphasis on etifoxine. METHODS We used available data from the recent literature to update the mode of action of anxiolytics. We focussed our search on anxiolytics acting at GABAARs, as well as on the pharmacological properties of formerly and currently prescribed anxiolytics. RESULTS Considering the adverse effects of current treatments aimed at increasing inhibitory controls, optimisation of existing pharmacotherapies is of crucial importance. Among the alternative compounds targeting the GABAergic system, translocator protein (TSPO) ligands, such as etifoxine (EFX), which promote endogenous neurosteroidogenesis, are emerging as promising candidates for anxiety relief. In several papers comparing the efficacy of benzodiazepines and EFX, EFX showed interesting properties with limited side effects. Indeed, neurosteroids are potent GABAAR modulators with highly underrated anxiolytic properties. CONCLUSIONS Novel therapeutic strategies have been emerging following the recognition of neurosteroids as potent anxiolytics. Featured at the top of the list for well-tolerated anxiety relief, TSPO ligands such as etifoxine appear promising.
Collapse
Affiliation(s)
- Pierrick Poisbeau
- a Centre National de la Recherche Scientifique and University of Strasbourg, Institute for Cellular and Integrative Neuroscience (INCI) , Strasbourg , France
| | - Geraldine Gazzo
- a Centre National de la Recherche Scientifique and University of Strasbourg, Institute for Cellular and Integrative Neuroscience (INCI) , Strasbourg , France
| | - Laurent Calvel
- a Centre National de la Recherche Scientifique and University of Strasbourg, Institute for Cellular and Integrative Neuroscience (INCI) , Strasbourg , France
| |
Collapse
|
8
|
Prieto-Martín AI, Aroca-Aguilar JD, Sánchez-Sánchez F, Muñoz LJ, López DE, Escribano J, de Cabo C. Molecular and neurochemical substrates of the audiogenic seizure strains: The GASH:Sal model. Epilepsy Behav 2017; 71:218-225. [PMID: 26071997 DOI: 10.1016/j.yebeh.2015.05.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/12/2015] [Accepted: 05/14/2015] [Indexed: 01/24/2023]
Abstract
PURPOSE Animal models of audiogenic epilepsy are useful tools to understand the mechanisms underlying human reflex epilepsies. There is accumulating evidence regarding behavioral, anatomical, electrophysiological, and genetic substrates of audiogenic seizure strains, but there are still aspects concerning their neurochemical basis that remain to be elucidated. Previous studies have shown the involved of γ-amino butyric acid (GABA) in audiogenic seizures. The aim of our research was to clarify the role of the GABAergic system in the generation of epileptic seizures in the genetic audiogenic seizure-prone hamster (GASH:Sal) strain. MATERIAL AND METHODS We studied the K+/Cl- cotransporter KCC2 and β2-GABAA-type receptor (GABAAR) and β3-GABAAR subunit expressions in the GASH:Sal both at rest and after repeated sound-induced seizures in different brain regions using the Western blot technique. We also sequenced the coding region for the KCC2 gene both in wild- type and GASH:Sal hamsters. RESULTS Lower expression of KCC2 protein was found in GASH:Sal when compared with controls at rest in several brain areas: hippocampus, cortex, cerebellum, hypothalamus, pons-medulla, and mesencephalon. Repeated induction of seizures caused a decrease in KCC2 protein content in the inferior colliculus and hippocampus and an increase in the pons-medulla. When compared to controls, the basal β2-GABAAR subunit in the GASH:Sal was overexpressed in the inferior colliculus, rest of the mesencephalon, and cerebellum, whereas basal β3 subunit levels were lower in the inferior colliculus and rest of the mesencephalon. Repeated seizures increased β2 both in the inferior colliculus and in the hypothalamus and β3 in the hypothalamus. No differences in the KCC2 gene-coding region were found between GASH:Sal and wild-type hamsters. CONCLUSIONS These data indicate that GABAergic system functioning is impaired in the GASH:Sal strain, and repeated seizures seem to aggravate this dysfunction. These results have potential clinical relevance and support the validity of employing the GASH:Sal strain as a model to study the neurochemistry of genetic reflex epilepsy. This article is part of a Special Issue entitled "Genetic and Reflex Epilepsies, Audiogenic Seizures and Strains: From Experimental Models to the Clinic".
Collapse
Affiliation(s)
- Ana I Prieto-Martín
- Research Department, Neuropsychopharmacology Unit, Albacete General Hospital, 37 Hermanos Falcó Street, Albacete E-02006, Spain.
| | - J Daniel Aroca-Aguilar
- Department of Genetics, Faculty of Medicine, University of Castilla-La Mancha, 14 Almansa Street, Albacete E-02006, Spain.
| | - Francisco Sánchez-Sánchez
- Department of Genetics, Faculty of Medicine, University of Castilla-La Mancha, 14 Almansa Street, Albacete E-02006, Spain.
| | - Luis J Muñoz
- INCYL, University of Salamanca, 1 Pintor Gallego Street, Salamanca E-37007, Spain.
| | - Dolores E López
- INCYL, University of Salamanca, 1 Pintor Gallego Street, Salamanca E-37007, Spain.
| | - Julio Escribano
- Department of Genetics, Faculty of Medicine, University of Castilla-La Mancha, 14 Almansa Street, Albacete E-02006, Spain.
| | - Carlos de Cabo
- Research Department, Neuropsychopharmacology Unit, Albacete General Hospital, 37 Hermanos Falcó Street, Albacete E-02006, Spain.
| |
Collapse
|
9
|
Ennaceur A, Chazot PL. Preclinical animal anxiety research - flaws and prejudices. Pharmacol Res Perspect 2016; 4:e00223. [PMID: 27069634 PMCID: PMC4804324 DOI: 10.1002/prp2.223] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/16/2015] [Accepted: 01/20/2016] [Indexed: 12/22/2022] Open
Abstract
The current tests of anxiety in mice and rats used in preclinical research include the elevated plus-maze (EPM) or zero-maze (EZM), the light/dark box (LDB), and the open-field (OF). They are currently very popular, and despite their poor achievements, they continue to exert considerable constraints on the development of novel approaches. Hence, a novel anxiety test needs to be compared with these traditional tests, and assessed against various factors that were identified as a source of their inconsistent and contradictory results. These constraints are very costly, and they are in most cases useless as they originate from flawed methodologies. In the present report, we argue that the EPM or EZM, LDB, and OF do not provide unequivocal measures of anxiety; that there is no evidence of motivation conflict involved in these tests. They can be considered at best, tests of natural preference for unlit and/or enclosed spaces. We also argued that pharmacological validation of a behavioral test is an inappropriate approach; it stems from the confusion of animal models of human behavior with animal models of pathophysiology. A behavioral test is developed to detect not to produce symptoms, and a drug is used to validate an identified physiological target. In order to overcome the major methodological flaws in animal anxiety studies, we proposed an open space anxiety test, a 3D maze, which is described here with highlights of its various advantages over to the traditional tests.
Collapse
Affiliation(s)
| | - Paul L. Chazot
- School of Biological and Biomedical SciencesDurham UniversityDurhamUK
| |
Collapse
|
10
|
Wang JL, Wang B, Chen W. Differences in cocaine-induced place preference persistence, locomotion and social behaviors between C57BL/6J and BALB/cJ mice. DONG WU XUE YAN JIU = ZOOLOGICAL RESEARCH 2015; 35:426-35. [PMID: 25297083 DOI: 10.13918/j.issn.2095-8137.2014.5.426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
C57BL/6J and BALB/cJ mice display significant differences in sociability and response to drugs, but the phenotypic variability of their susceptibility to cocaine is still not well known. In this study, the differences between these two mice strains in the persistence of cocaine-induced conditioned place preference (CPP), as well as the locomotion and social behaviors after the 24-hour withdrawal from a four-day cocaine (20 mg/kg/day) administration were investigated. The results showed that the cocaine-induced CPP persisted over two weeks in C57BL/6J mice, while it diminished within one week among BALB/cJ mice. After 24-hours of cocaine withdrawal, high levels of locomotion as well as low levels of social interaction and aggressive behavior were found in C57BL/6J mice, but no significant changes were found in BALB/cJ mice, indicating that cocaine-induced CPP persistence, locomotion and social behavior are not consistent between these two strains, and that overall C57BL/6J mice are more susceptible to cocaine than BALB/cJ mice at the tested doses.
Collapse
Affiliation(s)
- Jian-Li Wang
- 1. College of Biology Sciences and Engineering, Beifang University of Nationalities, Yinchuan 750021, China.
| | - Bei Wang
- College of Biology Sciences and Engineering, Beifang University of Nationalities, Yinchuan 750021, China; College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Wen Chen
- College of Biology Sciences and Engineering, Beifang University of Nationalities, Yinchuan 750021, China
| |
Collapse
|
11
|
Djabrouhou N, Guermouche MH. Development of a stability-indicating HPLC method of etifoxine with characterization of degradation products by LC-MS/TOF, 1H and 13C NMR. J Pharm Biomed Anal 2014; 100:11-20. [PMID: 25117950 DOI: 10.1016/j.jpba.2014.07.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 07/18/2014] [Accepted: 07/20/2014] [Indexed: 10/25/2022]
Abstract
This paper describes a new LC-MS/TOF method for the degradation products determination when Etifoxine (ETI) is submitted to different stress conditions. Chromatography is performed by using Kromasil C18 column (250mm×4.6mm, 5μm particle size). The selected mobile phase consists of formate buffer 0.02M, pH 3 and methanol (70/30, v/v). ETI is submitted to oxidative, acidic, basic, hydrolytic, thermal and UV light degradations. Detection is made at 254nm by photodiode array detector and mass spectrometry. A number of degradation products (DPs) called DPA, DPB, DPC and DPD are found depending on the stress; DPA with heat, DPA and DPB in acidic media or under UV-light; DPA, DPB and DPC under basic stress; DPA, DPB, DPC and DPD with oxidation. LC-MS/TOF is used to characterize the four DPs of ETI resulting from different stress conditions. (1)H and (13)C NMR are used to confirm the DP structures. The ETI fragmentation pathway is proposed. The method is validated with reference to International Conference on Harmonization guidelines and ETI are selectively determined in presence of its DPs, demonstrating its stability-indicating nature. Finally, for the validation step, specificity, linearity, accuracy and precision are determined for ETI and its DPs.
Collapse
Affiliation(s)
- Nadia Djabrouhou
- Laboratoire de chromatographie, Faculté de chimie, USTHB, BP 32, El-Alia, Bab-Ezzouar, 16133 Alger, Algeria
| | - Moulay-Hassane Guermouche
- Laboratoire de chromatographie, Faculté de chimie, USTHB, BP 32, El-Alia, Bab-Ezzouar, 16133 Alger, Algeria.
| |
Collapse
|
12
|
Kalueff AV, Nguyen M. Testing anxiolytic drugs in the C57BL/6J mouse strain. J Pharmacol Toxicol Methods 2014; 69:205-7. [DOI: 10.1016/j.vascn.2014.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
13
|
Aouad M, Petit-Demoulière N, Goumon Y, Poisbeau P. Etifoxine stimulates allopregnanolone synthesis in the spinal cord to produce analgesia in experimental mononeuropathy. Eur J Pain 2013; 18:258-68. [PMID: 23881562 DOI: 10.1002/j.1532-2149.2013.00367.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND Pathological pain states are often associated with neuronal hyperexcitability in the spinal cord. Reducing this excitability could theoretically be achieved by amplifying the existing spinal inhibitory control mediated by GABAA receptors (GABAARs). In this study, we used the non-benzodiazepine anxiolytic etifoxine (EFX) to characterize its interest as pain killer and spinal mechanisms of action. EFX potentiates GABAAR function but can also increase its function by stimulating the local synthesis of 3α-reduced neurosteroids (3αNS), the most potent endogenous modulators of this receptor. METHODS The efficacy of EFX analgesia and the contribution of 3αNS were evaluated in a rat model of mononeuropathy. Spinal contribution of EFX was characterized through changes in pain symptoms after intrathecal injections, spinal content of EFX and 3αNS, and expression of FosB-related genes, a marker of long-term plasticity. RESULTS We found that a 2-week treatment with EFX (>5 mg/kg, i.p.) fully suppressed neuropathic pain symptoms. This effect was fully mediated by 3αNS and probably by allopregnanolone, which was found at a high concentration in the spinal cord. In good agreement, the level of EFX analgesia after intrathecal injections confirmed that the spinal cord is a privileged target as well as the limited expression of FosB/ΔFosB gene products that are highly expressed in persistent pain states. CONCLUSIONS This preclinical study shows that stimulating the production of endogenous analgesics such as 3αNS represents an interesting strategy to reduce neuropathic pain symptoms. Since EFX is already prescribed as an anxiolytic in several countries, a translation to the human clinic needs to be rapidly evaluated.
Collapse
Affiliation(s)
- M Aouad
- Nociception and Pain Department, Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique and University of Strasbourg, Strasbourg, France
| | | | | | | |
Collapse
|
14
|
Kovalev GI, Kondrakhin EA, Salimov RM. Behavioral and neuroreceptor differences in C57BL/6 and BALB/c mice. NEUROCHEM J+ 2013. [DOI: 10.1134/s1819712413020049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
15
|
Mazzone CM, Larese TP, Kiraly DD, Eipper BA, Mains RE. Analysis of kalirin-7 knockout mice reveals different effects in female mice. Mol Pharmacol 2012; 82:1241-9. [PMID: 22989522 DOI: 10.1124/mol.112.080838] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Estradiol treatment of ovariectomized rodents is known to affect the morphology of dendritic spines and produce behavioral and cognitive effects. Kalirin-7 (Kal7), a postsynaptic density (PSD)-localized Rho-guanine nucleotide exchange factor, is important for dendritic spine formation and stability. Male Kal7 knockout [Kal7(KO)] mice exhibit a number of abnormal behavioral and biochemical phenotypes. Given that chronic 17β-estradiol (E2) replacement of ovariectomized rats enhanced Kal7 expression in the hippocampus and primary hippocampal cultures, we assessed the behavioral and biochemical effects of chronic E2 treatment of ovariectomized female wild-type and Kal7(KO) mice. Both intact and ovariectomized Kal7(KO) female mice exhibited decreased anxiety-like behavior compared with the corresponding wild type in the elevated zero maze and were unaffected by E2 treatment. Chronic E2 decreased locomotor activity in the open field and enhanced performance in a passive-avoidance fear conditioning task, which were both unaffected by genotype. Kal7(KO) female mice engaged in significantly more object exploration, both familiar and novel, than did wild-type females. E2 enhanced the acute locomotor response to cocaine, with no significant effect of genotype. Similar to Kal7(KO) males, Kal7(KO) females had decreased levels of N-methyl-d-aspartate receptor 2B in hippocampal PSD fractions with no effect of E2 treatment. The differing behavioral effects of Kal7 ablation in female and male mice may offer insight into the molecular underpinnings of these differences.
Collapse
Affiliation(s)
- Christopher M Mazzone
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT 06030-3401, USA
| | | | | | | | | |
Collapse
|
16
|
Omission of the habituation procedure in the acquisition of a working memory task – evidence from Balb/c, C57/BL6J, and CD-1 mice. Behav Brain Res 2011; 223:203-10. [DOI: 10.1016/j.bbr.2011.04.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 04/12/2011] [Accepted: 04/20/2011] [Indexed: 12/11/2022]
|