A Functional Interaction Between Hippo-YAP Signalling and SREBPs Mediates Hepatic Steatosis in Diabetic Mice

Overview

Journal J Cell Mol Med

Specialties Cell Biology
Molecular Biology

Date 2019 Mar 2

PMID 30821074

Citations 30

Authors

Zhiping Shu

Yuan Gao

Guopeng Zhang

Yu Zhou

Jing Cao

Dongyi Wan

Xiaohua Zhu

Wenqian Xiong

Affiliations

Soon will be listed here.

Abstract

The Hippo pathway is an evolutionarily conserved regulator of organ size and tumorigenesis that negatively regulates cell growth and survival. Whether the Hippo pathway regulates cell metabolism is unknown. Here, we report that in the nucleus of hepatocytes, Yes-associated protein(YAP)-the terminal effector of the Hippo pathway-directly interacts with sterol regulatory element binding proteins (SREBP-1c and SREBP-2) on the promoters of the fatty acid synthase (FAS) and 30-hydroxylmethyl glutaryl coenzyme A reductase (HMGCR), thereby stimulating their transcription and promoting hepatocyte lipogenesis and cholesterol synthesis. In diet-induced diabetic mice, either Lats1 overexpression or YAP knockdown protects against hepatic steatosis and hyperlipidaemia through suppression of the interaction between YAP and SREBP-1c/SREBP-2. These results suggest that YAP is a nuclear co-factor of SREBPs and that the Hippo pathway negatively affects hepatocyte lipogenesis by inhibiting the function of YAP-SREBP complexes.

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