Sha Yan, Zhenyao Xu, Fangzhou Lou, Lingyun Zhang, Fang Ke, Jing Bai, Zhaoyuan Liu, Jinlin Liu, Hong Wang, Huiyuan Zhu, Yang Sun, Wei Cai, Yuanyuan Gao, Bing Su, Qun Li, Xiao Yang, Jianxiu Yu, Yuping Lai, Xue-Zhong Yu, Yan Zheng, Nan Shen, Y Eugene Chin, Honglin Wang
NF-κB is constitutively activated in psoriatic epidermis. However, how activated NF-κB promotes keratinocyte hyperproliferation in psoriasis is largely unknown. Here we report that the NF-κB activation triggered by inflammatory cytokines induces the transcription of microRNA (miRNA) miR-31, one of the most dynamic miRNAs identified in the skin of psoriatic patients and mouse models. The genetic deficiency of miR-31 in keratinocytes inhibits their hyperproliferation, decreases acanthosis and reduces the disease severity in psoriasis mouse models...
July 3, 2015: Nature Communications