Some pathways such as Wnt, TGF-β, ECM–receptor interaction, and platelet activation, which were reported to be associated with hair follicle development were enriched in the top 20 KEGG pathways of the upregulated genes in DPCs, whereas multiple pathways related to microbiota and immunity, such as human papillomavirus infection, Influenza A, the IL-17 signaling pathway, and the tight junction were enriched in the downregulated genes of DPCs (Figure 4b). The gene discussed is IL17A; the disease is human papilloma virus infection.