Activation of cholangiocyte mTORC1 drives alcoholinduced ductular reactionAlcohol consumption has increased over the COVID-19 pandemic, and this rise in alcohol consumption has led to increases in alcohol-associated liver disease and alcohol-associated hepatitis (AH) in particular. [1] The growing problem of AH has been exacerbated by the lack of suitable therapeutics to reverse AH, with many patients requiring liver transplants. The etiology of AH is complex, and current animal models of AH have not been able to replicate certain hallmarks of severe AH that correlate with prognosis, including ductular reaction (DR). This has greatly limited AH therapeutic development even though many targets and pathways have shown promise in preclinical models. In fact, several studies have shown that the mechanistic target of rapamycin complex 1 (mTORC1), a master regulator of cell growth, energy metabolism, and autophagy, is activated in AH, and inhibition of mTORC1 can reverse ethanol-induced liver injury. [2] However, the effect of mTORC1 on alcohol-associated DR and its associated liver injury remains unknown. Some of the questions surrounding mTORC1 in alcohol-associated liver disease are answered in this issue of HEPATOLOGY by Chao et al. [3] Chao and colleagues detected increased mTORC1 activation in chronic-plus-binge ethanol-fed mouse and human AH liver samples, and such elevated mTORC1 activation is associated with decreased protein levels of tuberous sclerosis complex 1 (TSC1), a negative regulator of mTORC1. These findings led the authors to characterize ethanol-induced liver injury in liverspecific Tsc1 knockout (L-Tsc1 KO) mice that exhibit constitutive mTORC1 activation. Alanine transaminase levels were not different between wild-type (WT) and L-Tsc1 KO mice subjected to the control diet, indicating that baseline liver injury may not be different. However, L-Tsc1 KO mice on the control diet exhibited increased liver size, DR, fibrosis, and immune cell infiltration compared with their WT