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Simon B, Buzás A, Bokor P, Csabafi K, Ibos KE, Bodnár É, Török L, Földesi I, Siska A, Bagosi Z. The Effects of Alcohol Intoxication and Withdrawal on Hypothalamic Neurohormones and Extrahypothalamic Neurotransmitters. Biomedicines 2023; 11:biomedicines11051288. [PMID: 37238959 DOI: 10.3390/biomedicines11051288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/10/2023] [Accepted: 04/11/2023] [Indexed: 05/28/2023] Open
Abstract
The aim of the present study was to determine the effects of alcohol intoxication and withdrawal on hypothalamic neurohormones such as corticotropin-releasing factor (CRF) and arginine vasopressin (AVP), and extrahypothalamic neurotransmitters such as striatal dopamine (DA), amygdalar gamma aminobutyric acid (GABA), and hippocampal glutamate (GLU). In addition, the participation of the two CRF receptors, CRF1 and CRF2, was investigated. For this purpose, male Wistar rats were exposed to repeated intraperitoneal (ip) administration of alcohol every 12 h, for 4 days and then for 1 day of alcohol abstinence. On the fifth or sixth day, intracerebroventricular (icv) administration of selective CRF1 antagonist antalarmin or selective CRF2 antagonist astressin2B was performed. After 30 min, the expression and concentration of hypothalamic CRF and AVP, the concentration of plasma adrenocorticotropic hormone (ACTH) and corticosterone (CORT), and the release of striatal DA, amygdalar GABA, and hippocampal GLU were measured. Our results indicate that the neuroendocrine changes induced by alcohol intoxication and withdrawal are mediated by CRF1, not CRF2, except for the changes in hypothalamic AVP, which are not mediated by CRF receptors.
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Affiliation(s)
- Balázs Simon
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - András Buzás
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - Péter Bokor
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - Krisztina Csabafi
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - Katalin Eszter Ibos
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - Éva Bodnár
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
| | - László Török
- Department of Traumatology, Albert Szent-Györgyi Medical School, University of Szeged, 6720 Szeged, Hungary
| | - Imre Földesi
- Institute of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, 6720 Szeged, Hungary
| | - Andrea Siska
- Institute of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, 6720 Szeged, Hungary
| | - Zsolt Bagosi
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Str. 1, 6720 Szeged, Hungary
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Dong N, Du P, Hao X, He Z, Hou W, Wang L, Yuan W, Yang J, Jia R, Tai F. Involvement of GABA A receptors in the regulation of social preference and emotional behaviors by oxytocin in the central amygdala of female mandarin voles. Neuropeptides 2017; 66:8-17. [PMID: 28764883 DOI: 10.1016/j.npep.2017.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 05/19/2017] [Accepted: 07/24/2017] [Indexed: 12/31/2022]
Abstract
The central nucleus of the amygdala (CeA) is the main output of the amygdala and plays an important role in behavioral and neuroendocrine responses to stress. Receptors for the neuropeptide oxytocin (OT) and GABAA are found in high concentration in the CeA. The mechanisms underlying regulation of CeA OT in emotional and social behavior remain unclear. In this study we evaluated the effects of intra-CeA OT administration of different doses (0.1, 1 and 10ng/side), OT receptor antagonist (OTR-A) (1, 10 and 100ng/side) and OT plus OTR-A on social and emotional behavior using a social preference paradigm, open field test and elevated plus maze test in female monogamous mandarin voles (Microtus mandarinus). We then examined whether different doses of the GABAA receptor antagonist bicuculline (5, 10 and 100ng/side) affected the behavioral changes induced by intra-CeA microinjection of OT (1ng/side). We found that administration of OT to the CeA increased social preference, central area investigation times in the open field test, and visits, transitions and time spent in the open arms in the elevated plus maze test; all responses were dose-dependent. Administration of OT plus OTR-A to the CeA produced no effects. Administration of bicuculline in combination with OT to the CeA decreased social preference, central area investigation times in the open field test, and visits, transitions and time spent in the open arms of the elevated plus maze test. These data suggest that OT in the CeA facilitates sociality and reduces levels of anxiety by interacting with local GABAA receptors.
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Affiliation(s)
- Na Dong
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Peirong Du
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Xin Hao
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Zhixiong He
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Wenjuan Hou
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Limin Wang
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Wei Yuan
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Jinfeng Yang
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China
| | - Rui Jia
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China.
| | - Fadao Tai
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710100, China.
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Carter JM, Landin JD, Gigante ED, Rieger SP, Diaz MR, Werner DF. Inhibitors of Calcium-Activated Anion Channels Modulate Hypnotic Ethanol Responses in Adult Sprague Dawley Rats. Alcohol Clin Exp Res 2016; 40:301-8. [PMID: 26842249 DOI: 10.1111/acer.12957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 11/02/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Ethanol is widely known for its depressant effects; however, the underlying neurobiological mechanisms are not clear. Calcium-activated anion channels (CAACs) contribute to extracellular chloride levels and thus may be involved in regulating inhibitory mechanisms within the central nervous system. Therefore, we hypothesized that CAACs influence ethanol behavioral sensitivity by altering CAAC expression. METHODS We assessed the role of CAACs in ethanol-induced loss of righting reflex (LORR) and locomotor activity using intracerebroventricular infusions of several nonselective CAAC blockers. CAAC expression was determined after ethanol exposure. RESULTS Ethanol-induced LORR (4.0 g/kg, intraperitoneally [i.p.]) was significantly attenuated by all 4 CAAC blockers. Blocking CAACs did not impact ethanol's low-dose (1.5 g/kg, i.p.) locomotor-impairing effects. Biochemical analysis of CAAC protein expression revealed that cortical Bestrophin1 (Best1) and Tweety1 levels were reduced as early as 30 minutes following a single ethanol injection (3.5 g/kg, intraperitoneally [i.p.]) and remained decreased 24 hours later in P2 fractions. Cortical Best1 levels were also reduced following 1.5 g/kg. However, CAAC expression was unaltered in the striatum following a single ethanol exposure. Ethanol did not affect Tweety2 levels in either brain region. CONCLUSIONS These results suggest that CAACs are a major target of ethanol in vivo, and the regulation of these channels contributes to select behavioral actions of ethanol.
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Affiliation(s)
- Jenna M Carter
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York
| | - Justine D Landin
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York
| | - Eduardo D Gigante
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York.,Department of Health and Human Services, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland
| | - Samuel P Rieger
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York
| | - Marvin R Diaz
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York
| | - David F Werner
- Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University - State University of New York, Binghamton, New York
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Diaz MR, Valenzuela CF. Sensitivity of GABAergic Tonic Currents to Acute Ethanol in Cerebellar Granule Neurons is Not Age- or δ Subunit-Dependent in Developing Rats. Alcohol Clin Exp Res 2016; 40:83-92. [PMID: 26727526 DOI: 10.1111/acer.12940] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 10/22/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND The age of first exposure to ethanol (EtOH), as well as reduced sensitivity to its motor-impairing effects, are associated with a future predisposition to abuse EtOH. In adolescence, acute EtOH potentiates GABA transmission, including tonic inhibition mediated by δ-containing extrasynaptic GABAA receptors (GABAA Rs) in cerebellar granule neurons (CGNs), an effect that likely contributes to EtOH-induced motor impairment. Prenatal EtOH exposure is strikingly prevalent and is associated with increased EtOH abuse later in life; however, the acute effects of EtOH on GABA transmission in developing CGNs are unknown. METHODS Using whole-cell patch-clamp electrophysiological techniques in acute brain slices, we examined the acute effects of EtOH on GABA transmission and functionally assessed the role of δ-containing GABAA Rs in CGNs of preweanling (postnatal day [P] 12 to 14) and postweanling (P28 to 30) male Sprague-Dawley rats. RESULTS The magnitude of basal tonic currents were similar at both ages. However, 4,5,6,7-Tetrahydroisoxazolo[5,4-c]pyridin-3-ol hydrochloride, an agonist with preferential affinity for δ-containing GABAA Rs, significantly potentiated tonic currents to a larger magnitude in CGNs from postweanlings compared to preweanlings. Conversely, acute application of EtOH (80 mM) significantly increased tonic currents and the frequency of spontaneous inhibitory postsynaptic currents to a similar extent in CGNs from pre- and postweanlings. CONCLUSIONS These findings highlight the sensitivity of the developing cerebellum to EtOH. Furthermore, this study demonstrates age-dependent functional changes in a well-characterized circuitry that may contribute to the short- and long-term effects of prenatal exposure to EtOH.
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Affiliation(s)
- Marvin R Diaz
- Department of Neurosciences, University of New Mexico Health Sciences Center, 1 University of New Mexico, Albuquerque, New Mexico.,Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University-State University of New York, Binghamton, New York
| | - C Fernando Valenzuela
- Department of Neurosciences, University of New Mexico Health Sciences Center, 1 University of New Mexico, Albuquerque, New Mexico
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Jiang H, Fang D, Kong LY, Jin ZR, Cai J, Kang XJ, Wan Y, Xing GG. Sensitization of neurons in the central nucleus of the amygdala via the decreased GABAergic inhibition contributes to the development of neuropathic pain-related anxiety-like behaviors in rats. Mol Brain 2014; 7:72. [PMID: 25277376 PMCID: PMC4201706 DOI: 10.1186/s13041-014-0072-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 09/18/2014] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Despite high prevalence of anxiety accompanying with chronic pain, the mechanisms underlying pain-related anxiety are largely unknown. With its well-documented role in pain and emotion processing, the amygdala may act as a key player in pathogenesis of neuropathic pain-related anxiety. Pain-related plasticity and sensitization of CeA (central nucleus of the amygdala) neurons have been shown in several models of chronic pain. In addition, firing pattern of neurons with spike output can powerfully affect functional output of the brain nucleus, and GABAergic neurons are crucial in the modulation of neuronal excitability. In this study, we first investigated whether pain-related plasticity (e.g. alteration of neuronal firing patterns) and sensitization of CeA neurons contribute to nerve injury-evoked anxiety in neuropathic rats. Furthermore, we explored whether GABAergic disinhibition is responsible for regulating firing patterns and intrinsic excitabilities of CeA neurons as well as for pain-related anxiety in neuropathic rats. RESULTS We discovered that spinal nerve ligation (SNL) produced neuropathic pain-related anxiety-like behaviors in rats, which could be specifically inhibited by intra-CeA administration of anti-anxiety drug diazepam. Moreover, we found potentiated plasticity and sensitization of CeA neurons in SNL-induced anxiety rats, of which including: 1) increased burst firing pattern and early-adapting firing pattern; 2) increased spike frequency and intrinsic excitability; 3) increased amplitude of both after-depolarized-potential (ADP) and sub-threshold membrane potential oscillation. In addition, we observed a remarkable reduction of GABAergic inhibition in CeA neurons in SNL-induced anxiety rats, which was proved to be important for altered firing patterns and hyperexcitability of CeA neurons, thereby greatly contributing to the development of neuropathic pain-related anxiety. Accordantly, activation of GABAergic inhibition by intra-CeA administration of muscimol, a selective GABAA receptors agonist, could inhibit SNL-induced anxiety-like behaviors in neuropathic rats. By contrast, suppression of GABAergic inhibition by intra-CeA administration of bicuculline, a selective GABAA receptors antagonist, produced anxiety-like behavior in normal rats. CONCLUSIONS This study suggests that reduction of GABAergic inhibition may be responsible for potentiated plasticity and sensitization of CeA neurons, which likely underlie the enhanced output of amygdala and neuropathic pain-related anxiety in SNL rats.
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Affiliation(s)
- Hong Jiang
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - Dong Fang
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - Ling-Yu Kong
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - Zi-Run Jin
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - Jie Cai
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - Xue-Jing Kang
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China.
| | - You Wan
- Department of Neurobiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, P.R. China. .,Key Laboratory for Neuroscience, Ministry of Education and Ministry of Health, Beijing, 100191, P.R. China.
| | - Guo-Gang Xing
- Neuroscience Research Institute, Peking University, 38 Xue-Yuan Road, Beijing, 100191, P.R. China. .,Department of Neurobiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, P.R. China. .,Key Laboratory for Neuroscience, Ministry of Education and Ministry of Health, Beijing, 100191, P.R. China.
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