Echinacea Purpurea Extract Polarizes M1 Macrophages in Murine Bone Marrow-Derived Macrophages through the Activation of Jnk

Echinacea purpurea is an indigenous North American purple cone flower used by North Americans for treatment of various infectious diseases and wounds. This study investigated the effect of polysaccharide enriched extract of Echinacea purpurea (EE) on the polarization of macrophages. The results showed that 100??g/mL of EE could markedly activate the macrophage by increasing the expression of CD80, CD86, and MHCII molecules. Meanwhile, EE upregulated the markers of classically activated macrophages (M1) such as CCR7 and the production of IL-1β, IL-6, IL-12p70, TNF-αand NO. The functional tests showed that EE enhanced the phagocytic and intracellular bactericidal activity of macrophage against ST. Furthermore, we demonstrated that JNK are required for EE-induced NO and M1-related cytokines production. Together, these results demonstrated that EE can polarize macrophages towards M1 phenotype, which is dependent on the JNK signaling pathways. J. Cell. Biochem. 118: 2664-2671, 2017. ? 2017 Wiley Periodicals, Inc.

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