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Manukyan AL, Melkonyan MM, Sukiasyan LM, Vardanyan SO, Hunanyan LS, Yenkoyan KB, Harutyunyan SH. The regulatory effects of mesedin and beditin alpha2-adrenoblockers on the functional activity of the nervous, cardiovascular, and endocrine systems in rats under the hypoxic conditions. Naunyn Schmiedebergs Arch Pharmacol 2024:10.1007/s00210-024-02968-1. [PMID: 38277039 DOI: 10.1007/s00210-024-02968-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
One of the reasons of the development of pathologies causing death is hypoxia. The purposes of this study were (1) to study some physiological and biochemical mechanisms of α2-adrenoblockers, which ensure the tissue resistance increase to hypoxia; (2) to offer new drugs contributing to the increase of tissues' stability towards the hypoxic affection; and (3) to submit new medications to surpass by their anti-hypoxic activity of those already used in modern medicine and have some advantages. The reactivity of postsynaptic vascular α2-adrenoceptors was determined on the damaged spinal cord expressed by the blood pressure increase in response to intravenous administration of azepexole that selectively binds to α2-adrenoceptors. Determination of the systemic hemodynamic values and the vascular resistance to the blood flow was performed by the method with plastic microspheres of marked isotopes. pO2 in the blood and the oxygen-transporting function were determined in a sample of 0.1 ml of blood in 30, 90, and 180 min after the α2-adrenoblockers' injections. It has been found that one of the major hemodynamic effects of mesedin and beditin was an improvement in cardiac output, as well as a prolonged increase in coronary blood flow and vasodilation of the heart vessels. Some anti-hypoxic mechanisms of the studied α2-adrenoblockers are an improvement of blood oxygen-transporting function followed by tissue oxygenation and the increased level of corticosterone and resistance to hypoxia. Revealing the mechanisms of action of the postsynaptic α2-adrenoceptors suggests that mesedin and beditin are potentially effective therapeutic means for many hypoxic conditions.
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Affiliation(s)
- Ashkhen L Manukyan
- Department of Medical Chemistry, Yerevan State Medical University After M. Heratsi, Koryun 2, 0025, Yerevan, Armenia.
- Cobrain Center, Yerevan State Medical University After M. Heratsi, 0025, 2 Koryun Str., Yerevan, Armenia.
| | - Magdalina M Melkonyan
- Department of Medical Chemistry, Yerevan State Medical University After M. Heratsi, Koryun 2, 0025, Yerevan, Armenia
- Cobrain Center, Yerevan State Medical University After M. Heratsi, 0025, 2 Koryun Str., Yerevan, Armenia
| | - Lilit M Sukiasyan
- Laboratory of Morphological Studies, SRS, Yerevan State Medical University After M. Heratsi, 0025, Yerevan, Armenia
| | - Svetlana O Vardanyan
- Scientific-Technological Center of Organic-Pharmaceutical Chemistry of NAS RA, Institute of Fine Organic Chemistry After A.L. Mnjoyan, 0014, Yerevan, Armenia
| | - Lilit S Hunanyan
- Department of Medical Chemistry, Yerevan State Medical University After M. Heratsi, Koryun 2, 0025, Yerevan, Armenia
- Cobrain Center, Yerevan State Medical University After M. Heratsi, 0025, 2 Koryun Str., Yerevan, Armenia
| | - Konstantin B Yenkoyan
- Neuroscience Laboratory, Cobrain Center, Yerevan State Medical University After M. Heratsi, 0025, 2 Koryun Str., Yerevan, Armenia
- Department of Biochemistry, Yerevan State Medical University M. Heratsi, 0025, Yerevan, Armenia
| | - Seda H Harutyunyan
- Scientific-Technological Center of Organic-Pharmaceutical Chemistry of NAS RA, Institute of Fine Organic Chemistry After A.L. Mnjoyan, 0014, Yerevan, Armenia
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Sorbi C, Tait A, Battisti UM, Brasili L. Spiroxatrine derivatives towards 5-HT 1A receptor selectivity. Pharmacol Rep 2020; 72:427-434. [PMID: 32002826 DOI: 10.1007/s43440-019-00039-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/04/2019] [Accepted: 11/22/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND In our previous work, spiroxatrine was taken as reference compound to develop selective NOP ligands. Therefore, several triazaspirodecanone derivatives were synthesized. Here, we verify their selectivity towards other 5-HT1 receptor subtypes and with respect to α2-AR (Adrenergic Receptors). METHODS Binding affinities were determined on cells expressing human cloned receptors for 5-HT1A/B/D and α2A/B/C subtypes. The Ki values were determined for those with at least 50% radioligand inhibition. RESULTS All our derivatives show a moderate affinity for α2 subtypes, spanning from 5 to 7.5 pKi values. Moreover, they show affinity values in a μM-nM range at the 5-HT1A receptor, while they are practically inactive at 5-HT1B and 5-HT1D subtypes. Compound 11, the best of the series, has a 5-HT1A pKi value of 8.43 similar to spiroxatrine but, notably, it has a 5-HT1A favorable selectivity ratio of 52, 8 and 29, respectively over α2A, α2B and α2C adrenoceptor subtypes. CONCLUSIONS In this SAR study, a 5-HT1A selective ligand has been identified in which a tetralone moiety replaced the 1,4-benzodioxane of spiroxatrine and the methylene linker to the triazaspirodecanone portion was maintained in position 2.
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Affiliation(s)
- Claudia Sorbi
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi 103, 41125, Modena, Italy
| | - Annalisa Tait
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi 103, 41125, Modena, Italy
| | - Umberto M Battisti
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi 103, 41125, Modena, Italy.,Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - Livio Brasili
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi 103, 41125, Modena, Italy.
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Estrade L, Cassel JC, Parrot S, Duchamp-Viret P, Ferry B. Microdialysis Unveils the Role of the α 2-Adrenergic System in the Basolateral Amygdala during Acquisition of Conditioned Odor Aversion in the Rat. ACS Chem Neurosci 2019; 10:1929-1934. [PMID: 30179513 DOI: 10.1021/acschemneuro.8b00314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Previous work has shown that β-adrenergic and GABAergic systems in the basolateral amygdala (BLA) are involved in the acquisition of conditioned odor aversion (COA) learning. The involvement of α2-adrenoreceptors, however, is poorly documented. In a first experiment, male Long-Evans rats received infusions of 0.1 μg of the selective α2-antagonist dexefaroxan (Dex) in the BLA before being exposed to COA learning. In a second experiment, levels of norepinephrine (NE) were analyzed following Dex retrodialysis into the BLA. While microdialysis data showed a significant enhancement of NE release in the BLA with Dex, behavioral results showed that pre-CS infusion of Dex impaired, rather than facilitated, the acquisition of COA. Our results show that the NE system in the BLA is involved in the acquisition of COA, including a strong α2-receptor modulation until now unsuspected. Supported by the recent literature, the present data suggest moreover that the processes underlying this learning are probably mediated by the balanced effects of NE excitatory/inhibitory signaling in the BLA, in which interneurons are highly involved.
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Affiliation(s)
- Lucile Estrade
- Centre of Research
in Neuroscience Lyon, UMR CNRS 5292 - INSERM U 1028, Université
Claude Bernard Lyon 1, 50 avenue Tony Garnier, 69366 Lyon, France
| | - Jean-Christophe Cassel
- Laboratoire de
Neurosciences Cognitives et Adaptatives, UMR 7364, Université
de Strasbourg − CNRS, Faculté de Psychologie, 12 rue Goethe 67000 Strasbourg, France
| | - Sandrine Parrot
- Centre of Research
in Neurosciences Lyon, INSERM U1028 − Université Claude
Bernard Lyon 1, NeuroDialyTics UNIT, 7 Rue Guillaume Paradin, F-69372 Lyon Cedex 08, France
| | - Patricia Duchamp-Viret
- Centre of Research
in Neuroscience Lyon, UMR CNRS 5292 - INSERM U 1028, Université
Claude Bernard Lyon 1, 50 avenue Tony Garnier, 69366 Lyon, France
| | - Barbara Ferry
- Centre of Research
in Neuroscience Lyon, UMR CNRS 5292 - INSERM U 1028, Université
Claude Bernard Lyon 1, 50 avenue Tony Garnier, 69366 Lyon, France
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Rivera-Mancilla E, Altamirano-Espinoza AH, Manrique-Maldonado G, Villanueva-Castillo B, Villalón CM. Differential cardiac sympatho-inhibitory responses produced by the agonists B-HT 933, quinpirole and immepip in normoglycaemic and diabetic pithed rats. Clin Exp Pharmacol Physiol 2018; 45:767-778. [PMID: 29675928 DOI: 10.1111/1440-1681.12949] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/22/2018] [Accepted: 04/10/2018] [Indexed: 01/24/2023]
Abstract
This study compared the cardiac sympatho-inhibitory responses produced by agonists at α2 -adrenergic (B-HT 933), dopamine D2 -like (quinpirole) and histamine H3 /H4 (immepip) receptors between normoglycaemic and streptozotocin-pretreated (diabetic) pithed rats. Intravenous (i.v.) continuous infusions of B-HT 933, quinpirole or immepip were used in normoglycaemic and diabetic pithed rats to analyse their sympatho-inhibitory effects on the electrically-stimulated cardioaccelerator sympathetic outflow. Both in normoglycaemic and diabetic animals, B-HT 933 (until 100 μg/kg per minute) and quinpirole (until 10 μg/kg per minute) inhibited the tachycardic responses to electrical sympathetic stimulation, but not those to i.v. bolus of exogenous noradrenaline. These sympatho-inhibitory responses were more pronounced in diabetic than in normoglycaemic animals. Accordingly, the areas under the curve for 100 μg/kg per minute B-HT 933 and 10 μg/kg per minute quinpirole in diabetic rats (1065 ± 70 and 920 ± 35, respectively) were significantly smaller (P < .05) than those in normoglycaemic rats (1220 ± 45 and 1360 ± 42, respectively). In contrast, immepip infusions produced cardiac sympatho-inhibition in normoglycaemic (until 10 μg/kg per minute), but not in diabetic (until 100 μg/kg per minute) animals. Our results suggest that in diabetic pithed rats: (i) the more pronounced cardiac sympatho-inhibition to B-HT 933 and quinpirole may be probably due to up-regulation of α2 -adrenergic and dopamine D2 -like receptors, respectively; (ii) the histamine H3 /H4 receptors do not seem to play a sympatho-inhibitory role; and (iii) there is a differential participation of α2 -adrenergic and dopamine D2 -like receptors, which may certainly represent therapeutic targets for the treatment of diabetic complications such as cardiovascular autonomic neuropathy.
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Sánchez-Soto M, Casadó-Anguera V, Yano H, Bender BJ, Cai NS, Moreno E, Canela EI, Cortés A, Meiler J, Casadó V, Ferré S. α 2A- and α 2C-Adrenoceptors as Potential Targets for Dopamine and Dopamine Receptor Ligands. Mol Neurobiol 2018; 55:8438-8454. [PMID: 29552726 DOI: 10.1007/s12035-018-1004-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/07/2018] [Indexed: 01/12/2023]
Abstract
The poor norepinephrine innervation and high density of Gi/o-coupled α2A- and α2C-adrenoceptors in the striatum and the dense striatal dopamine innervation have prompted the possibility that dopamine could be an effective adrenoceptor ligand. Nevertheless, the reported adrenoceptor agonistic properties of dopamine are still inconclusive. In this study, we analyzed the binding of norepinephrine, dopamine, and several compounds reported as selective dopamine D2-like receptor ligands, such as the D3 receptor agonist 7-OH-PIPAT and the D4 receptor agonist RO-105824, to α2-adrenoceptors in cortical and striatal tissue, which express α2A-adrenoceptors and both α2A- and α2C-adrenoceptors, respectively. The affinity of dopamine for α2-adrenoceptors was found to be similar to that for D1-like and D2-like receptors. Moreover, the exogenous dopamine receptor ligands also showed high affinity for α2A- and α2C-adrenoceptors. Their ability to activate Gi/o proteins through α2A- and α2C-adrenoceptors was also analyzed in transfected cells with bioluminescent resonance energy transfer techniques. The relative ligand potencies and efficacies were dependent on the Gi/o protein subtype. Furthermore, dopamine binding to α2-adrenoceptors was functional, inducing changes in dynamic mass redistribution, adenylyl cyclase activity, and ERK1/2 phosphorylation. Binding events were further studied with computer modeling of ligand docking. Docking of dopamine at α2A- and α2C-adrenoceptors was nearly identical to its binding to the crystallized D3 receptor. Therefore, we provide conclusive evidence that α2A- and α2C-adrenoceptors are functional receptors for norepinephrine, dopamine, and other previously assumed selective D2-like receptor ligands, which calls for revisiting previous studies with those ligands.
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Affiliation(s)
- Marta Sánchez-Soto
- Integrative Neurobiology Section, National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Triad Technology Building, 333 Cassell Drive, Baltimore, MD, 21224, USA.,Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - Verònica Casadó-Anguera
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - Hideaki Yano
- Integrative Neurobiology Section, National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Triad Technology Building, 333 Cassell Drive, Baltimore, MD, 21224, USA
| | - Brian Joseph Bender
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA.,Center for Structural Biology, Vanderbilt University, Nashville, TN, 37232, USA
| | - Ning-Sheng Cai
- Integrative Neurobiology Section, National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Triad Technology Building, 333 Cassell Drive, Baltimore, MD, 21224, USA
| | - Estefanía Moreno
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - Enric I Canela
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - Antoni Cortés
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - Jens Meiler
- Department of Pharmacology, Vanderbilt University, Nashville, TN, 37232, USA.,Center for Structural Biology, Vanderbilt University, Nashville, TN, 37232, USA
| | - Vicent Casadó
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain. .,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Institute of Biomedicine, University of Barcelona, Barcelona, Spain.
| | - Sergi Ferré
- Integrative Neurobiology Section, National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Triad Technology Building, 333 Cassell Drive, Baltimore, MD, 21224, USA.
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Reyes BAS, Carvalho AF, Szot P, Kalamarides DJ, Wang Q, Kirby LG, Van Bockstaele EJ. Cortical adrenoceptor expression, function and adaptation under conditions of cannabinoid receptor deletion. Exp Neurol 2017; 292:179-192. [PMID: 28341460 PMCID: PMC5454488 DOI: 10.1016/j.expneurol.2017.03.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/15/2017] [Accepted: 03/21/2017] [Indexed: 12/12/2022]
Abstract
A neurochemical target at which cannabinoids interact to have global effects on behavior is brain noradrenergic circuitry. Acute and repeated administration of a cannabinoid receptor synthetic agonist is capable of increasing multiple indices of noradrenergic activity. This includes cannabinoid-induced 1) increases in norepinephrine (NE) release in the medial prefrontal cortex (mPFC); 2) desensitization of cortical α2-adrenoceptor-mediated effects; 3) activation of c-Fos in brainstem locus coeruleus (LC) noradrenergic neurons; and 4) increases in anxiety-like behaviors. In the present study, we sought to examine adaptations in adrenoceptor expression and function under conditions of cannabinoid receptor type 1 (CB1r) deletion using knockout (KO) mice and compare these to wild type (WT) controls. Electrophysiological analysis of α2-adrenoceptor-mediated responses in mPFC slices in WT mice showed a clonidine-induced α2-adrenoceptor-mediated increase in mPFC cell excitability coupled with an increase in input resistance. In contrast, CB1r KO mice showed an α2-adrenoceptor-mediated decrease in mPFC cell excitability. We then examined protein expression levels of α2- and β1-adrenoceptor subtypes in the mPFC as well as TH expression in the locus coeruleus (LC) of mice deficient in CB1r. Both α2- and β1-adrenoceptors exhibited a significant decrease in expression levels in CB1r KO mice when compared to WT in the mPFC, while a significant increase in TH was observed in the LC. To better define whether the same cortical neurons express α2A-adrenoceptor and CB1r in mPFC, we utilized high-resolution immunoelectron microscopy. We localized α2A-adrenoceptors in a knock-in mouse that expressed a hemoagglutinin (HA) tag downstream of the α2A-adrenoceptor promoter. Although the α2A-adrenoceptor was often identified pre-synaptically, we observed co-localization of CB1r with α2-adrenoceptors post-synaptically in the same mPFC neurons. Finally, using receptor binding, we confirmed prior results showing that α2A-adrenoceptor is unchanged in mPFC following acute or chronic exposure to the synthetic cannabinoid receptor agonist, WIN 55,212-2, but is increased, following chronic treatment followed by a period of abstinence. Taken together, these data provide convergent lines of evidence indicating cannabinoid regulation of the cortical adrenergic system.
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Affiliation(s)
- B A S Reyes
- Department of Pharmacology and Physiology, College of Medicine, Drexel University Philadelphia, PA 19102, United States.
| | - A F Carvalho
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
| | - P Szot
- Northwest Network for Mental Illness Research, Education, and Clinical Center, Veterans Administration Puget Sound Health Care System and Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98108, United States
| | - D J Kalamarides
- Center for Substance Abuse Research and Department of Anatomy and Cell Biology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA 19140, United States
| | - Q Wang
- Department of Cell, Development and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL 35294, United States
| | - L G Kirby
- Center for Substance Abuse Research and Department of Anatomy and Cell Biology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA 19140, United States
| | - E J Van Bockstaele
- Department of Pharmacology and Physiology, College of Medicine, Drexel University Philadelphia, PA 19102, United States
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