Constitutive AMPK activation prevents hepatocellular carcinoma development through inhibition of HNF4α activity.

Abstract

Hepatocellular carcinoma (HCC) is a major cause of cancer-related mortality and is largely driven by metabolic disorders such as obesity and type 2 diabetes. The AMP-activated protein kinase (AMPK) is a master regulator of metabolism, and its activation has been proposed as a therapeutic strategy for treating metabolic disorders. However, although AMPK activity is down-regulated in HCC, the precise role of AMPK in HCC development has not been clearly delineated. Here, we investigated the ability of constitutive AMPK activation to prevent HCC development using a constitutively active AMPK transgenic mouse model and a pharmacological AMPK activator. We observed that AMPK activation substantially reduced tumor formation in both diethylnitrosamine (DEN)-induced and streptozocin-induced (STAM) models of HCC via altered bile acid metabolism and inhibition of hepatic nuclear factor alpha (HNF4α) signaling. These findings provide mechanistic insights into AMPK biology and highlight the potential of AMPK as a therapeutic target, emphasizing the intricate interplay between metabolic dysregulation and cancer development.