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Cordycepin (3'-deoxyadenosine) is one of the active components isolated from Cordyceps militaris, and has been shown to have anti-inflammatory, anti-oxidant, anti-aging, and anti-cancer effects. Mast cell-derived thymic stromal lymphopoietin (TSLP) plays an important role in the pathogenesis of allergic inflammatory reactions. Here, we investigated the regulatory effect and mechanisms of cordycepin on the expression of TSLP in the human mast cell line, HMC-1 cells, and in the human keratinocyte cell line, HaCaT cells. Cordycepin significantly decreased the production and mRNA expression of TSLP through the inhibition of caspase-1 and nuclear factor-κB activation. Cordycepin also significantly reduced the phosphorylation of receptor-interacting protein 2 and inhibitory kappa B (IκB) kinase β. Cordycepin significantly decreased the production and mRNA expression of interleukin (IL)-8, IL-1β, IL-6, and tumor necrosis factor-α in activated HMC-1 cells. Moreover, cordycepin significantly decreased the levels of TSLP in activated HaCaT cells. Our studies suggest that cordycepin can be applied to the treatment of allergic inflammatory diseases exacerbated by TSLP.

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Cordycepin Suppresses Thymic Stromal Lymphopoietin Expression &lt;i&gt;via&lt;/i&gt; Blocking Caspase-1 and Receptor-Interacting Protein 2 Signaling Pathways in Mast Cells