A bioenergetic basis for multiorgan dysfunction in sepsis
Jentho, E.; Ademolue, T. W.; Peters-Sengers, H.; Butler, J. M.; Xu, L.-L.; Trikha Rastogi, S.; Kitoko, J.; Pagnotta, S.; Drotleff, B.; Faisca, P.; Polishchuk, V.; Mesquita, M.; Horn, P.; Metzing, U. B.; Cardoso, S.; Mithieux, G.; Bauer, M.; Chouchane, O.; Weis, S.; Panagiotou, G.; von Loeffelholz, C.; van der Poll, T.; Soares, M.
Show abstract
Sepsis is a life-threatening multiorgan dysfunction that develops from a maladaptive host response to infection1. With an estimated 49 million cases per year and [~]11 million related deaths2, sepsis is a global WHO health priority3. Failure to overcome sepsis morbidity and lethality4,5 calls for alternative therapeutic approaches6-8. Here we report that adipocyte lipolysis is vital to prevent the pathogenesis of sepsis in mice. This protective response is evolutionary conserved, producing a plasma lipidomic profile9,10 that reflects on the severity of clinical sepsis. Mechanistically, adipocyte lipolysis fuels energy metabolism to sustain adaptive thermoregulation to infection, via insulin production and insulin receptor (INSR) signaling in adipocytes. This metabolic-based defense strategy does not impact on bacterial burden, establishing disease tolerance to infection11-14. In conclusion, adipocyte lipolysis induces insulin to rewire energy metabolism and support organ function in response to infection.
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