<i>Ppp1r3b</i> is a metabolic switch that shifts hepatic energy storage from lipid to glycogen.

ABSTRACT: The PPP1R3B gene, encoding PPP1R3B protein, is critical for liver glycogen synthesis and maintaining blood glucose levels. Genetic variants affecting PPP1R3B expression are associated with several metabolic traits and liver disease, but the precise mechanisms are not fully understood. We studied the effects of both Ppp1r3b overexpression and deletion in mice and cell models and found that both changes in Ppp1r3b expression result in dysregulated metabolism and liver damage, with overexpression increasing liver glycogen stores, while deletion resulted in higher liver lipid accumulation. These patterns were confirmed in humans where variants increasing PPP1R3B expression had lower liver fat and decreased plasma lipids, whereas putative loss-of-function vari

SUBMITTER: Creasy KT 

PROVIDER: S-EPMC12083521 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature