Abstract
AIM: The Yes-associated protein (YAP) family of transcriptional coactivators has emerged as a potent promoter of cell proliferation in many types of stem/progenitor cells and cancers. Skin is a squamous epithelium that is continuously regenerated by stem/progenitor cells in the basal layer and is capable of wound healing, and YAP also plays an important role in maintaining skin homeostasis and cellular proliferation. Therefore, we focused on YAP and investigated the importance of YAP regulation in allergic contact dermatitis from the perspective of wound healing and regeneration. METHODS: We investigated the expression and pathological characteristics of Transmembrane protein 207 (TMEM207), focusing on YAP-mediated regulation in atopic models, as abnormal TMEM207 expression may cause various functional abnormalities or regulate the function of YAP. RESULTS: TMEM207 was detected not only in the stomach and large intestine but also in the bulge region of the sebaceous glands and hair roots in mice expressing TMEM207. In addition, ATP binding cassette subfamily B member 1 (ABCB1) expression decreased in the sebaceous glands, and MIB E3 Ubiquitin Protein Ligase 1 (MIB-1) expression diminished in the epidermis. Furthermore, although we were unable to confirm the binding of TMEM207 to NEDD4, we confirmed the binding of TMEM207 to the Yes1-associated transcription factor (YAP) by immunoprecipitation, and a decrease in the nuclear localization of YAP was observed by immunohistochemical staining. CONCLUSION: Our findings indicate that abnormal expression of TMEM207 is involved in the decline of skin regeneration capacity through YAP, leading to the aggravation of Allergic contact dermatitis.