Adiponectin inhibits Wnt co-receptor, Lrp6, phosphorylation and β-catenin signaling.

ABSTRACT: Adiponectin is a pleiotropic adipokine implicated in obesity, metabolic syndrome and cardiovascular disease. Recent studies have identified adiponectin as a negative regulator of tissue fibrosis. Wnt/β-catenin signaling has also been implicated in metabolic syndrome and can promote tissue fibrosis, but the extent to which adiponectin cross-regulates Wnt/β-catenin signaling is unknown. Using primary human dermal fibroblasts and recombinant purified proteins, we show that adiponectin can limit β-catenin accumulation and downstream gene activation by inhibiting Lrp6 phosphorylation, a key activation step in canonical Wnt signaling. Inhibition of Wnt3a-mediated Lrp6 phospho-activation is relatively rapid (e.g., by 30 min), and is not dependent on established adiponectin G-protein coupled recep

SUBMITTER: Reinke L 

PROVIDER: S-EPMC4747689 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature