IL6 and influenza: In mice infected with lethal influenza infection, administration of 15d-PGJ2 1 day after infection resulted in reduced influenza morbidity and mortality, accompanied by substantially decreased gene expression of proinflammatory cytokines (IL-6 and TNF-α) and chemokines (CCL2, CCL3, CCL4, and CXCL10) via activation of PPAR-γ pathway (Cloutier et al., 2012).