Qingfei Paidu Decoction might significantly inhibit IL-6 and TNF-α signaling pathways in regulating COVID-19-related cytokine storm.
We evaluated the effects of 578 herbs and all 338 reported anti-COVID-19 TCM formulae on cytokine storm-related signaling pathways, and identified the key targets of the relevant pathways and potential active ingredients in these herbs.
A total of 16 herbs was identified to have a significant inhibitory effect on the IL-6 pathway, while 37 herbs suppress the TNF-α pathway significantly. In the heatmap of gene expression induced by these herbs, more than half of the genes are down-regulated, suggesting that these herbs have a significant inhibitory effect on the expression of cytokine storm-related genes.
By combining the HTS2 assay and herb scoring results, we constructed a formula-herb-gene-pathway network diagram of Qingfei Paidu Decoction. In this formula, we identified 4 herbs with an inhibitory effect on the IL-6 or TNF-α pathways, including Guizhi, which significantly inhibits the IL-6 pathway, and Shegan, Baizhu, and Zexie, which significantly inhibit the TNF-α pathway.