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Jeanblanc J, Sauton P, Houdant C, Fernandez Rodriguez S, de Sousa SV, Jeanblanc V, Bodeau S, Labat L, Soichot M, Vorspan F, Naassila M. Sex-related differences in the efficacy of Baclofen enantiomers on self-administered alcohol in a binge drinking pattern and dopamine release in the core of the nucleus accumbens. Front Pharmacol 2023; 14:1146848. [PMID: 37007041 PMCID: PMC10060511 DOI: 10.3389/fphar.2023.1146848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023] Open
Abstract
Introduction: Clinical studies on the effectiveness of Baclofen in alcohol use disorder (AUD) yielded mixed results possibly because of differential effects of the enantiomers and sex-related differences. Here we examined the effect of the different Baclofen enantiomers on alcohol intake and on evoked dopamine release in the core of the nucleus accumbens (NAcc) in male and female Long Evans rats.Methods: Rats were trained to chronically self-administer 20% alcohol solution in daily binge drinking sessions and were treated with the different forms of Baclofen [RS(±), R(+) and S(−)]. The effects on the evoked dopamine release within the core of the nucleus accumbens were measured in brain slices from the same animals and the alcohol naïve animals using the fast scan cyclic voltammetry technique.Results: RS(±)-Baclofen reduced alcohol intake regardless of sex but more females were non-responders to the treatment. R(+)-Baclofen also reduced alcohol intake regardless of sex but females were less sensitive than males. S(−)-Baclofen did not have any effect on average but in some individuals, especially in the females, it did increase alcohol intake by at least 100%. There were no sex differences in Baclofen pharmacokinetic but a strong negative correlation was found in females with a paradoxical effect of increased alcohol intake with higher blood Baclofen concentration. Chronic alcohol intake reduced the sensitivity to the effect of Baclofen on evoked dopamine release and S(−)-Baclofen increased dopamine release specifically in females.Discussion: Our results demonstrate a sex-dependent effect of the different forms of Baclofen with no or negative effects (meaning an increase in alcohol self-administration) in subgroup of females that could be linked to a differential effect on dopamine release and should warrant future clinical studies on alcohol use disorder pharmacotherapy that will deeply analyze sex difference.
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Affiliation(s)
- Jérôme Jeanblanc
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
- GDR3557 Psychiatrie-Addictions, Institut de Psychiatrie, University Hospital Federation (FHU A2M2P), Caen, France
| | - Pierre Sauton
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
- GDR3557 Psychiatrie-Addictions, Institut de Psychiatrie, University Hospital Federation (FHU A2M2P), Caen, France
| | - Charles Houdant
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
- GDR3557 Psychiatrie-Addictions, Institut de Psychiatrie, University Hospital Federation (FHU A2M2P), Caen, France
| | - Sandra Fernandez Rodriguez
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
| | - Sofia Vilelas de Sousa
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
| | - Virginie Jeanblanc
- Animal Facility of the Université de Picardie Jules Verne, Amiens, France
| | - Sandra Bodeau
- MP3CV Laboratory, Department of Clinical Pharmacology, Amiens University Hospital, University of Picardie Jules Verne, Amiens, France
| | - Laurence Labat
- INSERM UMR-S 1144, Optimisation Thérapeutique en Neuropsychopharmacologie, Université de Paris, Paris, France
- Faculté de Médecine, Université de Paris Cité, Paris, France
- Département de Psychiatrie et de Médecine Addictologique, Hôpital Fernand Widal, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Marion Soichot
- Laboratoire de Toxicologie Biologique, Hôpital Lariboisière, Paris, France
| | - Florence Vorspan
- INSERM UMRS1144, Département de Psychiatrie et de Médecine Addictologique, Assistance Publique—Hôpitaux de Paris, GH Lariboisière—Fernand Widal, GHU NORD, Université de Paris, Paris, France
| | - Mickael Naassila
- INSERM UMR-S 1247, Research Group on Alcohol and Pharmacodependences (GRAP), Université de Picardie Jules Verne, Amiens, France
- GDR3557 Psychiatrie-Addictions, Institut de Psychiatrie, University Hospital Federation (FHU A2M2P), Caen, France
- *Correspondence: Mickael Naassila,
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Magliaro C, Ahluwalia A. Biomedical Research on Substances of Abuse: The Italian Case Study. Altern Lab Anim 2022; 50:423-436. [PMID: 36222242 DOI: 10.1177/02611929221132215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Substances of abuse have the potential to cause addiction, habituation or altered consciousness. Most of the research on these substances focuses on addiction, and is carried out through observational and clinical studies on humans, or experimental studies on animals. The transposition of the EU Directive 2010/63 into Italian law in 2014 (IT Law 2014/26) includes a ban on the use of animals for research on substances of abuse. Since then, in Italy, public debate has continued on the topic, while the application of the Article prohibiting animal research in this area has been postponed every couple of years. In the light of this debate, we briefly review a range of methodologies - including animal and non-animal, as well as patient or population-based studies - that have been employed to address the biochemical, neurobiological, toxicological, clinical and behavioural effects of substances of abuse and their dependency. We then discuss the implications of the Italian ban on the use of animals for such research, proposing concrete and evidence-based solutions to allow scientists to pursue high-quality basic and translational studies within the boundaries of the regulatory and legislative framework.
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Affiliation(s)
- Chiara Magliaro
- Research Centre 'E. Piaggio', 9310University of Pisa, Pisa, Italy.,Department of Information Engineering, 9310University of Pisa, Pisa, Italy.,Interuniversity Centre for the Promotion of 3R Principles in Teaching and Research (Centro 3R), Pisa, Italy
| | - Arti Ahluwalia
- Research Centre 'E. Piaggio', 9310University of Pisa, Pisa, Italy.,Department of Information Engineering, 9310University of Pisa, Pisa, Italy.,Interuniversity Centre for the Promotion of 3R Principles in Teaching and Research (Centro 3R), Pisa, Italy
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Bauer MR, Hernández M, Kasten CR, Boehm SL. Systemic administration of racemic baclofen reduces both acquisition and maintenance of alcohol consumption in male and female mice. Alcohol 2022; 103:25-35. [PMID: 35870740 PMCID: PMC9835998 DOI: 10.1016/j.alcohol.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/17/2022] [Accepted: 06/28/2022] [Indexed: 01/14/2023]
Abstract
Baclofen is a GABAB receptor agonist with proposed use as a treatment for alcohol use disorder (AUD). In preclinical studies, racemic baclofen decreases alcohol consumption in both mice and rats; however, there is a significant disparity in the efficacy of the drug across species. We previously demonstrated that baclofen is enantioselective, with the racemic enantiomer successfully reducing binge-like alcohol consumption during Drinking-in-the-Dark (DID) in C57BL/6J (B6) mice, as well as 24-h consumption during two-bottle choice (2BC) preference drinking in replicate 1 High Alcohol Preferring (HAP) mice. Here we extend these findings by investigating the effects of racemic baclofen on the acquisition and maintenance of alcohol consumption, locomotor activity, and saccharin drinking in two different mouse genotypes and drinking paradigms. Adult male and female B6 mice were allowed free access to 20% (v/v) alcohol for 2 h daily in a 14-day DID procedure. Adult male and female replicate 2 HAP (HAP2) mice were allowed 24-h access to 10% (v/v) alcohol versus tap water in a 2BC procedure for 14 days. Systemic injections of baclofen (0.0 or 3.0 mg/kg) were given 3 h into the dark cycle on days 1-5 in alcohol acquisition experiments and days 6-10 in alcohol maintenance experiments. We found that racemic baclofen significantly reduces acquisition of DID and 2BC alcohol drinking in male and female B6 and HAP2 mice, whereas it only significantly reduces the maintenance of DID alcohol intake in B6 mice. Racemic baclofen did not alter home cage locomotor activity but did alter saccharin intake, suggesting it may have nonspecific effects. The current data add to literature suggesting that smaller doses of racemic baclofen may be an effective treatment of AUD. Future work should focus on the longitudinal efficacy of racemic baclofen in high-drinking mouse genotypes to further investigate whether it is effective for those with a genetic predisposition to AUD.
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Affiliation(s)
- Meredith R Bauer
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN, 46202, United States
| | - Maribel Hernández
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN, 46202, United States
| | - Chelsea R Kasten
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN, 46202, United States
| | - Stephen L Boehm
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN, 46202, United States.
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Sauton P, Deschamps C, Jeanblanc V, Pierrefiche O, Jeanblanc J, Naassila M. Interstrain differences in voluntary binge-like drinking behavior and in two acute ethanol injections-induced synaptic plasticity deficits in rats. Addict Biol 2021; 26:e12992. [PMID: 33331070 DOI: 10.1111/adb.12992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 12/14/2022]
Abstract
Propensity to drink alcohol and to initiate binge drinking behavior is driven by genetic factors. Recently, we proposed an original animal model useful in the study of voluntary binge-like drinking (BD) in outbred Long-Evans rats by combining intermittent access to 20% ethanol in a two-bottle choice (IA2BC) paradigm to 15-min daily sessions of 20% ethanol operant self-administration. We sought to compare three strains of outbred rats (Long-Evans, Sprague-Dawley, and Wistar) in our BD model. Because we found different propensity to BD between strains, we also sought to test interstrain differences using another procedure of two acute ethanol exposures known to alter long-term depression of hippocampal synaptic plasticity. Our results demonstrate that in both IA2BC and operant procedures, the Long-Evans strain consumed the highest, Wistar the lowest amount of ethanol, and the Sprague-Dawley was intermediate. Long-Evans rats were also the fastest consuming with the shortest time to reach 50% of their maximum consumption in 15 min. When we tested the acute effects of ethanol, long-term depression in hippocampus was abolished specifically in Long-Evans rats with no impact in the two other strains. Thus, our study reveals that the Long-Evans strain is the ideal strain in our recently developed animal model useful in the study of BD. In addition, with the other paradigm of forced acute ethanol exposure, the Long-Evans strain displayed an increase in sensitivity to the deleterious effect of BD on hippocampal synaptic plasticity. Further studies are needed in order to investigate why Long-Evans rats are more prone to BD.
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Affiliation(s)
- Pierre Sauton
- INSERM UMR 1247 – Research Group on Alcohol & Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Chloé Deschamps
- INSERM UMR 1247 – Research Group on Alcohol & Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Virginie Jeanblanc
- Animal Facility PlatAnN Université de Picardie Jules Verne Amiens France
| | - Olivier Pierrefiche
- INSERM UMR 1247 – Research Group on Alcohol & Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Jérôme Jeanblanc
- INSERM UMR 1247 – Research Group on Alcohol & Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Mickael Naassila
- INSERM UMR 1247 – Research Group on Alcohol & Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
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Tournier N, Pottier G, Caillé F, Coulon C, Goislard M, Jégo B, Negroni J, Leroy C, Saba W. Nalmefene alleviates the neuroimmune response to repeated binge-like ethanol exposure: A TSPO PET imaging study in adolescent rats. Addict Biol 2021; 26:e12962. [PMID: 32896074 DOI: 10.1111/adb.12962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/16/2020] [Accepted: 08/10/2020] [Indexed: 12/31/2022]
Abstract
A large body of preclinical research has shown that neuroimmunity plays a key role in the deleterious effects of alcohol (ethanol) to the brain. Translational imaging techniques are needed to monitor the efficacy of strategies to prevent or mitigate neuroinflammation and alleviate ethanol-induced neurotoxicity. Opioid receptor antagonists such as nalmefene are antagonists of the toll-like receptor 4, which may block the proinflammatory signaling cascade induced by ethanol at this specific target. Male adolescent rats received a validated protocol of ethanol injection (i.p, 3 g/kg daily for two consecutive days followed by two resting days) during 14 days. Positron emission tomography (PET) imaging with the translocator protein 18 kDa (TSPO) radioligand [18 F]DPA-714 was performed at day-15. Toxicity induced by repeated binge-like ethanol exposure (71% mortality) was drastically reduced by nalmefene pretreatment (0.4 mg/kg, 14% mortality). No mortality was observed in animals that received vehicle (control) or nalmefene alone. Compared with control animals (n = 10), a significant 2.8-fold to 4.6-fold increase in the volume of distribution (VT ) of [18 F]DPA-714 was observed among brain regions in animals exposed to ethanol only (n = 9). Pretreatment with nalmefene significantly alleviated the neuroimmune response to ethanol exposure in all brain regions (1.2-fold to 2.5-fold increase in VT ; n = 5). Nalmefene alone (n = 6) did not impact [18 F]DPA-714 VT compared with the control group. Nalmefene may protect against the neuroinflammatory response and overall toxicity associated with binge drinking. [18 F]DPA-714 PET imaging can be used to noninvasively address the neuroimmune impact of ethanol exposure and its modulation by pharmacological strategies in vivo, with translational perspectives.
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Affiliation(s)
- Nicolas Tournier
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Géraldine Pottier
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Fabien Caillé
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Christine Coulon
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Maud Goislard
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Benoit Jégo
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Julia Negroni
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Claire Leroy
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
| | - Wadad Saba
- BioMaps Université Paris‐Saclay, CEA, CNRS, Inserm Orsay France
- Institut des sciences du vivant Frédéric Joliot, CEA Service Hospitalier Frédéric Joliot Orsay France
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Echeverry‐Alzate V, Jeanblanc J, Sauton P, Bloch V, Labat L, Soichot M, Vorspan F, Naassila M. Is R(+)-Baclofen the best option for the future of Baclofen in alcohol dependence pharmacotherapy? Insights from the preclinical side. Addict Biol 2021; 26:e12892. [PMID: 32146727 DOI: 10.1111/adb.12892] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 02/14/2020] [Accepted: 02/18/2020] [Indexed: 12/16/2022]
Abstract
For several decades, studies conducted to evaluate the efficacy of RS(±)-Baclofen in the treatment of alcohol dependence yielded contrasting results. Human and animal studies recently questioned the use of the racemic drug in patients since a potential important role of the different enantiomers has been revealed with an efficacy thought to reside with the active R(+)-enantiomer. Here we conducted experiments in the postdependent rat model of alcohol dependence to compare the efficacy of R(+)-Baclofen or S(-)-Baclofen to that of RS(±)-Baclofen on ethanol intake, seeking, and relapse. R(+)-Baclofen was more effective than RS(±)-Baclofen in reducing ethanol intake and seeking during acute withdrawal and during relapse after abstinence. We also used an original population approach in order to identify drug responders. We found a significant proportion of responders to S(-)-Baclofen and RS(±)-Baclofen, displaying an increase in ethanol intake, and this increasing effect on alcohol intake was not seen in the R(+)-Baclofen group. At an intermediate dose of R(+)-Baclofen, devoid of any motor side effects, we identified a very large proportion of responders (75%) with a large decrease in ethanol intake (90% decrease). Finally, the response to RS(±)-Baclofen on ethanol intake was correlated to plasma level of Baclofen. R(+)-Baclofen and RS(±)-Baclofen were effective in reducing sucrose intake. Our study has important clinical implication since it suggests that the wide variability in the therapeutic responses of patients to RS(±)-Baclofen may come from the sensitivity to the R(+)-Baclofen but also to the one of the S(-)-Baclofen that can promote an increase in ethanol intake.
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Affiliation(s)
- Victor Echeverry‐Alzate
- INSERM UMR 1247‐Research Group on Alcohol and Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
- Instituto de Investigación Biomédica de Málaga (IBIMA) Hospital Regional Universitario de Málaga Spain
- Department of Psychobiology & Behavioral Sciences Methods, School of Psychology Complutense University of Madrid Spain
| | - Jérôme Jeanblanc
- INSERM UMR 1247‐Research Group on Alcohol and Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Pierre Sauton
- INSERM UMR 1247‐Research Group on Alcohol and Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
| | - Vanessa Bloch
- INSERM UMR‐S 1144 Université de Paris, Optimisation Thérapeutique en Neuropsychopharmacologie Paris France
- Faculté de Médecine Université de Paris Paris France
- Département de Psychiatrie et de Médecine Addictologique, Hôpital Fernand Widal Assistance Publique – Hôpitaux de Paris Paris France
| | - Laurence Labat
- INSERM UMR‐S 1144 Université de Paris, Optimisation Thérapeutique en Neuropsychopharmacologie Paris France
- Faculté de Médecine Université de Paris Paris France
- Département de Psychiatrie et de Médecine Addictologique, Hôpital Fernand Widal Assistance Publique – Hôpitaux de Paris Paris France
| | - Marion Soichot
- Laboratoire de Toxicologie Biologique – Hôpital Lariboisière Paris France
| | - Florence Vorspan
- INSERM UMR‐S 1144 Université de Paris, Optimisation Thérapeutique en Neuropsychopharmacologie Paris France
- Faculté de Médecine Université de Paris Paris France
- Département de Psychiatrie et de Médecine Addictologique, Hôpital Fernand Widal Assistance Publique – Hôpitaux de Paris Paris France
| | - Mickael Naassila
- INSERM UMR 1247‐Research Group on Alcohol and Pharmacodependences (GRAP) Université de Picardie Jules Verne Amiens France
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Abstract
This paper is the forty-first consecutive installment of the annual anthological review of research concerning the endogenous opioid system, summarizing articles published during 2018 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides and receptors as well as effects of opioid/opiate agonists and antagonists. The review is subdivided into the following specific topics: molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors (2), the roles of these opioid peptides and receptors in pain and analgesia in animals (3) and humans (4), opioid-sensitive and opioid-insensitive effects of nonopioid analgesics (5), opioid peptide and receptor involvement in tolerance and dependence (6), stress and social status (7), learning and memory (8), eating and drinking (9), drug abuse and alcohol (10), sexual activity and hormones, pregnancy, development and endocrinology (11), mental illness and mood (12), seizures and neurologic disorders (13), electrical-related activity and neurophysiology (14), general activity and locomotion (15), gastrointestinal, renal and hepatic functions (16), cardiovascular responses (17), respiration and thermoregulation (18), and immunological responses (19).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY, 11367, United States.
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Rabat Y, Henkous N, Corio M, Nogues X, Beracochea D. Baclofen but Not Diazepam Alleviates Alcohol-Seeking Behavior and Hypothalamic-Pituitary-Adrenal Axis Dysfunction in Stressed Withdrawn Mice. Front Psychiatry 2019; 10:238. [PMID: 31105600 PMCID: PMC6492502 DOI: 10.3389/fpsyt.2019.00238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 03/28/2019] [Indexed: 12/28/2022] Open
Abstract
This study compares the impact of repeated injections of baclofen (an agonist of GABAB receptors) or diazepam (a benzodiazepine having an agonist action on GABAA receptors) given during the alcohol-withdrawal period on the stress-induced restoration of alcohol-seeking behavior and hypothalamic-pituitary-adrenal (HPA) axis dysfunction after a long (4 weeks) abstinence. Thus, C57BL/6 mice were submitted to a 6-month alcohol consumption [12% volume/volume (v/v)] and were progressively withdrawn to water before testing. Diazepam (Valium®, Roche) and baclofen (Baclofen®, Mylan) were administered intraperitoneally for 15 consecutive days (1 injection/day) during the withdrawal period at decreasing doses ranging from 1.0 mg/kg (Day 15) to 0.25 mg/kg (Day 1) for diazepam and from 1.5 mg/kg (Day 15) to 0.37 mg/kg (Day 1) for baclofen. Alcohol-seeking behavior was evaluated by alcohol-place preference in an odor recognition task. In the stress condition, mice received three electric footshocks 45 min before behavioral testing. Blood was sampled immediately after behavioral testing, and plasma corticosterone concentrations were measured by commercial enzyme immunoassay kits. Results showed that non-stressed withdrawn mice did not exhibit alcohol-place preference or alteration of plasma corticosterone concentrations relative to water controls. After stress, however, withdrawn mice exhibited a significant alcohol-place preference and higher circulating corticosterone concentrations as compared to stressed water controls. Interestingly, repeated administration during the withdrawal phase of baclofen but not diazepam suppressed both the alcohol-place preference and normalized corticosterone levels in stressed withdrawn animals. In conclusion, this study evidences that a pre-treatment with baclofen but not with diazepam during the withdrawal phase normalized, even after a long period of abstinence, the HPA axis response to stress, which contributes to the long-term preventing effects of this compound on alcohol-seeking behavior.
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Affiliation(s)
- Yolaine Rabat
- Université de Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), CNRS UMR 5287, Pessac, France
| | - Nadia Henkous
- Université de Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), CNRS UMR 5287, Pessac, France
| | - Marc Corio
- Université de Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), CNRS UMR 5287, Pessac, France
| | | | - Daniel Beracochea
- Université de Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), CNRS UMR 5287, Pessac, France
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Zebrafish models of epigenetic regulation of CNS functions. Brain Res Bull 2018; 142:344-351. [DOI: 10.1016/j.brainresbull.2018.08.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 08/22/2018] [Accepted: 08/30/2018] [Indexed: 12/12/2022]
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