A new generation of mTORC1 inhibitor attenuates alcohol intake and reward in mice.
Alcohol use disorder (AUD) is a chronic condition associated with devastating socioeconomic consequences. Yet, pharmacotherapies to treat behavioral phenotypes such as uncontrolled heavy drinking are limited. Studies in rodents suggest that the mammalian target of rapamycin complex 1 (mTORC1) plays an important role in mechanisms underlying alcohol drinking behaviors as well as alcohol seeking and relapse. These preclinical evidence suggest that mTORC1 may be a therapeutic target for the treatment of AUD. Thus, the aim of the present study was to test the potential use of newly developed mTORC1 inhibitors, RapaLink-1 and MLN0128, in preclinical mouse models of AUD. First, we used the intermittent access to 20 percent alcohol in a two-bottle choice paradigm and tested the efficacy of the drugs to reduce alcohol intake in mice with a history of binge drinking and withdrawal. We found that both inhibitors reduce excessive alcohol intake and preference with RapaLink-1 exhibiting higher efficacy. We further observed that RapaLink-1 attenuates alcohol consumption during the first alcohol-drinking session in naïve mice, and interestingly, the effect was still present 14 days after the initial treatment with the drug. We also found that RapaLink-1 did not alter the consumption of water or saccharin, revealing a specific effect of the inhibitor on alcohol intake. Finally, we report that RapaLink-1 blocks the retrieval but not acquisition of alcohol place preference without affecting locomotion. Together, our findings suggest that RapaLink-1 may be developed as a new medication to treat and prevent the development of AUD.
['Morisot|Nadege|N|', 'Novotny|Christopher J|CJ|', 'Shokat|Kevan M|KM|', 'Ron|Dorit|D|0000-0001-5161-967X']
D000428:Alcohol Drinking D000818:Animals D001522:Behavior, Animal D001583:Benzoxazoles D063425:Binge Drinking D002492:Central Nervous System Depressants D002755:Choice Behavior D000431:Ethanol D000076222:Mechanistic Target of Rapamycin Complex 1 D051379:Mice D010080:Oxazoles D047428:Protein Kinase Inhibitors D011743:Pyrimidines D012201:Reward D020123:Sirolimus
mTORC1 alcohol RapaLink-1