Abstract
During the pathogenesis of obesity, a broad array of inflammatory and stress responses are frequently evoked in insulin-targeted metabolic tissues such as liver and adipose tissue, leading to chronic, low grade, local inflammation which plays a central role in the disruption of systemic metabolic homeostasis. This atypical state engages immune response pathways, including recruitment of immune cells into metabolic tissues, activation of IkB kinase (IKK) and c-Jun N-terminal kinase (JNK) pathways, and elevated production of an array of immune mediators, which negatively impact on nutrient metabolism and insulin action. However, the molecular basis for the induction of metabolic inflammation and the vast network of pathological responses remains elusive. Recent evidence indicates that metabolic inflammation results from deregulated double-stranded RNA (dsRNA) processing/signaling in metabolic tissues, which adversely regulates systemic glucose metabolism in obesity. These findings suggest the involvement of altered RNA networks in the immunometabolic regulation of obesity. This review focuses on the regulation of endogenous dsRNA and protein networks and how their functional changes are associated with inflammatory responses, resulting in the metabolic sequelae of obesity.
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Acknowledgment
I am grateful to the members of my laboratory, particularly Celvie L. Yuan and Elise Bernhard for helpful discussions and comments. I thank Vivian Hwa and Jason Fan for thoughtful comments. I acknowledge support from the American Heart Association, Digestive Disease Research Core Center in Cincinnati (DK078392), the Diabetes Action Research and Education Foundation, and PRESTO from the Japan Science and Technology Agency.
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Nakamura, T. (2016). Role of Double-Stranded RNA Pathways in Immunometabolism in Obesity. In: Miyasaka, M., Takatsu, K. (eds) Chronic Inflammation. Springer, Tokyo. https://doi.org/10.1007/978-4-431-56068-5_21
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DOI: https://doi.org/10.1007/978-4-431-56068-5_21
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