A dual mechanism fully blocks ethanol relapse: Role of vagal innervation

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dc.contributor.authorQuintanilla, María
dc.contributor.authorEzquer, Fernando
dc.contributor.authorMorales, Paola
dc.contributor.authorSantapau, Daniela
dc.contributor.authorEzquer, Marcelo
dc.contributor.authorHerrera, Mario
dc.contributor.authorIsrael, Yedy
dc.date.accessioned2022-11-14T20:57:24Z
dc.date.available2022-11-14T20:57:24Z
dc.date.issued2022
dc.description.abstractPrevious studies showed that vagotomy markedly inhibits alcohol self-administration. Present studies hypothesised that vagotomy significantly adds to the inhibition of alcohol relapse induced by drugs that reduce the alcohol-induced hyperglutamatergic state (e.g., N-acetylcysteine + acetylsalicylic acid). The alcohol relapse paradigm tested gauges the elevated alcohol intake observed in animals that had consumed ethanol chronically, were subjected to a prolonged alcohol deprivation and are subsequently allowed ethanol re-access. Ethanol-drinker rats (UChB) were exposed to 10% and 20% ethanol and water concurrently for 4 months, were alcohol deprived for 14 days and were thereafter allowed re-access to the ethanol solutions. An initial binge-like drinking episode is observed upon ethanol re-access, followed by a protracted elevated ethanol intake that exceeds the predeprivation intake baseline. Prior to ethanol re-access, animals were (i) administered N-acetylcysteine (40 mg/kg/day) + acetylsalicylic acid (15 mg/kg/day), (ii) were bilaterally vagotomised, (iii) were exposed to both treatments or (iv) received no treatments. The initial binge-like relapse intake and a protracted elevated ethanol intake observed after repeated ethanol deprivations/re-access cycles were inhibited by 50%-70% by the administration of N-acetylcysteine + acetylsalicylic acid and by 40%-70% by vagotomy, while the combined vagotomy plus N-acetylcysteine + acetylsalicylic acid treatment inhibited both the initial binge-like intake and the protracted ethanol intake by >95% (p < 0.001), disclosing a dual mechanism of ethanol relapse and subsequent inhibition beyond that induced by either treatment alone. Future exploration into the mechanism by which vagal activity contributes to ethanol relapse may have translational promise.es
dc.description.versionVersión publicadaes
dc.identifier.citationQuintanilla ME, Ezquer F, Morales P, Santapau D, Ezquer M, Herrera-Marschitz M, Israel Y. A dual mechanism fully blocks ethanol relapse: Role of vagal innervation. Addict Biol. 2022 Mar;27(2):e13140. doi: 10.1111/adb.13140es
dc.identifier.urihttps://doi.org/10.1111/adb.13140es
dc.identifier.urihttp://hdl.handle.net/11447/6665
dc.language.isoenes
dc.subjectN-acetylcysteinees
dc.subjectAcetyl salicylic acides
dc.subjectGlutamatees
dc.subjectVagotomyes
dc.subjectVagus nervees
dc.subjectVentral tegmental areaes
dc.titleA dual mechanism fully blocks ethanol relapse: Role of vagal innervationes
dc.typeArticlees
dcterms.sourceAddiction biologyes

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