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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Elife 2021 ; 10 (ä): ä Nephropedia Template TP
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Ketogenic diet restrains aging-induced exacerbation of coronavirus infection in mice #MMPMID34151773
Ryu S; Shchukina I; Youm YH; Qing H; Hilliard B; Dlugos T; Zhang X; Yasumoto Y; Booth CJ; Fernandez-Hernando C; Suarez Y; Khanna K; Horvath TL; Dietrich MO; Artyomov M; Wang A; Dixit VD
Elife 2021[Jun]; 10 (ä): ä PMID34151773show ga
Increasing age is the strongest predictor of risk of COVID-19 severity and mortality. Immunometabolic switch from glycolysis to ketolysis protects against inflammatory damage and influenza infection in adults. To investigate how age compromises defense against coronavirus infection, and whether a pro-longevity ketogenic diet (KD) impacts immune surveillance, we developed an aging model of natural murine beta coronavirus (mCoV) infection with mouse hepatitis virus strain-A59 (MHV-A59). When inoculated intranasally, mCoV is pneumotropic and recapitulates several clinical hallmarks of COVID-19 infection. Aged mCoV-A59-infected mice have increased mortality and higher systemic inflammation in the heart, adipose tissue, and hypothalamus, including neutrophilia and loss of gammadelta T cells in lungs. Activation of ketogenesis in aged mice expands tissue protective gammadelta T cells, deactivates the NLRP3 inflammasome, and decreases pathogenic monocytes in lungs of infected aged mice. These data establish harnessing of the ketogenic immunometabolic checkpoint as a potential treatment against coronavirus infection in the aged.