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An amylin analogue attenuates alcohol-related behaviours in various animal models of alcohol use disorder.

Artikel i vetenskaplig tidskrift
Författare Aimilia Lydia Kalafateli
Daniel Vallöf
Giancarlo Colombo
Irene Lorrai
Paola Maccioni
Elisabeth Jerlhag
Publicerad i Neuropsychopharmacology
Volym 44
Nummer/häfte 6
Sidor 1093-1102
ISSN 0893-133X
Publiceringsår 2019
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi
Sidor 1093-1102
Språk en
Länkar dx.doi.org/10.1038/s41386-019-0323-...
www.ncbi.nlm.nih.gov/entrez/query.f...
Ämneskategorier Neurovetenskap, Neurobiologi

Sammanfattning

Recent findings have identified salmon calcitonin (sCT), an amylin receptor agonist and analogue of endogenous amylin, as a potential regulator of alcohol-induced activation of the mesolimbic dopamine system and alcohol consumption. Providing that the role of amylin signalling in alcohol-related behaviours remains unknown, the present experiments investigate the effect of sCT on these behaviours and the mechanisms involved. We showed that repeated sCT administration decreased alcohol and food intake in outbred rats. Moreover, single administration of the potent amylin receptor antagonist, AC187, increased short-term alcohol intake in outbred alcohol-consuming rats, but did not affect food intake. Acute administration of sCT prevented relapse-like drinking in the "alcohol deprivation effect" model in outbred alcohol-experienced rats. Additionally, acute sCT administration reduced operant oral alcohol self-administration (under the fixed ratio 4 schedule of reinforcement) in selectively bred Sardinian alcohol-preferring rats, while it did not alter operant self-administration (under the progressive ratio schedule of reinforcement) of a highly palatable chocolate-flavoured beverage in outbred rats. Lastly, we identified differential amylin receptor expression in high compared to low alcohol-consuming rats, as reflected by decreased calcitonin receptor and increased receptor activity modifying protein 1 expression in the nucleus accumbens (NAc) of high consumers. Collectively, our data suggest that amylin signalling, especially in the NAc, may contribute to reduction of various alcohol-related behaviours.

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