1. Modeling and therapeutic targeting of inflammation-induced hepatic insulin resistance using human iPSC-derived hepatocytes and macrophages
- Author
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Groeger, Marko, Matsuo, Koji, Heidary Arash, Emad, Pereira, Ashley, Le Guillou, Dounia, Pino, Cindy, Telles-Silva, Kayque A, Maher, Jacquelyn J, Hsiao, Edward C, and Willenbring, Holger
- Subjects
Biochemistry and Cell Biology ,Biological Sciences ,Nutrition ,Digestive Diseases ,Liver Disease ,Stem Cell Research ,Stem Cell Research - Induced Pluripotent Stem Cell ,Diabetes ,Chronic Liver Disease and Cirrhosis ,Stem Cell Research - Induced Pluripotent Stem Cell - Human ,2.1 Biological and endogenous factors ,5.1 Pharmaceuticals ,Aetiology ,Development of treatments and therapeutic interventions ,Metabolic and endocrine ,Humans ,Induced Pluripotent Stem Cells ,Insulin Resistance ,Diabetes Mellitus ,Type 2 ,Liver ,Hepatocytes ,Inflammation ,Macrophages ,Insulins - Abstract
Hepatic insulin resistance is recognized as a driver of type 2 diabetes and fatty liver disease but specific therapies are lacking. Here we explore the potential of human induced pluripotent stem cells (iPSCs) for modeling hepatic insulin resistance in vitro, with a focus on resolving the controversy about the impact of inflammation in the absence of steatosis. For this, we establish the complex insulin signaling cascade and the multiple inter-dependent functions constituting hepatic glucose metabolism in iPSC-derived hepatocytes (iPSC-Heps). Co-culture of these insulin-sensitive iPSC-Heps with isogenic iPSC-derived pro-inflammatory macrophages induces glucose output by preventing insulin from inhibiting gluconeogenesis and glycogenolysis and activating glycolysis. Screening identifies TNFα and IL1β as the mediators of insulin resistance in iPSC-Heps. Neutralizing these cytokines together restores insulin sensitivity in iPSC-Heps more effectively than individual inhibition, reflecting specific effects on insulin signaling and glucose metabolism mediated by NF-κB or JNK. These results show that inflammation is sufficient to induce hepatic insulin resistance and establish a human iPSC-based in vitro model to mechanistically dissect and therapeutically target this metabolic disease driver.
- Published
- 2023