Cutaneous Gain-Of-Function Mutation Of LRIG3 Leads To Alopecia By Upregulation Of ERBB, PI3K/AKT, NOTCH1 Signaling Pathways

The study investigates the role of LRIG3 in skin homeostasis by overexpressing it in mouse skin, revealing that this leads to alopecia. The research highlights that LRIG3 overexpression results in hair loss and significant changes in skin protein profiles, particularly affecting keratinocyte differentiation and hair follicle development. The study identifies upregulation of ERBB, NOTCH, and PI3K/AKT signaling pathways in the skin of transgenic mice, suggesting that LRIG3 plays a crucial role in maintaining skin balance. This research provides new insights into the function of LRIG3, previously less understood compared to other LRIG family members.