The hair follicle (HF) is the biological unit responsible for producing a single hair shaft. The follicles are arranged with concentric epithelial progenitor layers surrounding the dermal core, which is the dermal papilla (DP). Classically, the development of the follicle itself can be divided into three stages: [Induction](https://www.wikipathways.org/index.php/Pathway:WP2804), Organogenesis and [Cytodifferentiation](https://www.wikipathways.org/index.php/Pathway:WP2840). Hair follicle development is a process dependent on epithelial-mesenchymal transitions orchestrated by many signaling pathways. Here we find one of three complex regulatory pathways assembled from a text mining approach portraying the development of this key mammal-specific structure. hair follicle cell CL:0002559 Cell Type 18593557 PubMed Hair follicle stem cells are specified and function in early skin morphogenesis. Cell Stem Cell 2008 Nowak JA Polak L Pasolli HA Fuchs E 23133399 PubMed Trps1 and its target gene Sox9 regulate epithelial proliferation in the developing hair follicle and are associated with hypertrichosis. PLoS Genet 2012 23133399 PubMed Trps1 and its target gene Sox9 regulate epithelial proliferation in the developing hair follicle and are associated with hypertrichosis. PLoS Genet 2012 23133399 PubMed Trps1 and its target gene Sox9 regulate epithelial proliferation in the developing hair follicle and are associated with hypertrichosis. PLoS Genet 2012 Fantauzzo KA Kurban M Levy B Christiano AM 17376426 PubMed Localization of Shh expression by Wnt and Eda affects axial polarity and shape of hairs. Dev Biol 2007 Hammerschmidt B Schlake T regulatory pathway PW:0000004 Pathway Ontology