The role of YAP/TAZ signaling in dendritic cell-mediated pathogenesis of insulin resistance and non-alcoholic fatty liver disease
Schcolnik-Cabrera, A.; Lee, M.; Dzierlaga, K.; Basso, P.; Strachan, E.; Zhu, M.; Akbari, M.; Clemente-Casares, X.; Tsai, S.
Show abstract
Obesity and insulin resistance (IR) are global health challenges linked to metabolic diseases, such as type 2 diabetes and non-alcoholic fatty liver disease (NAFLD). High-caloric intake, which is associated to NAFLD, induces adipocyte hypertrophy and inflammation, triggering dendritic cell (DC) activation and systemic inflammation. DC exacerbate inflammation by promoting pro-inflammatory responses, aggravating IR and NAFLD progression. NAFLD is characterized by liver fibrosis, which alters tissue stiffness that can trigger mechanosensing pathways such as the Hippo pathway in immune cell types. In this work we explored the roles of key mediators of the Hippo pathway, YAP and TAZ, in DCs within the context of liver fibrosis, obesity and IR, using a model of NAFLD induced by feeding a high fat high sucrose diet. Our findings indicate that specific deletion of YAP and/or TAZ in DCs had minimal impact on IR development and metabolic tissue inflammation. We conclude that YAP and TAZ have limited and possibly redundant roles in the immune pathophysiology of NAFLD and IR.
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