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NF-κB-induced microRNA-31 promotes epidermal hyperplasia by repressing protein phosphatase 6 in psoriasis. Nat Commun 2015 Jul 03;6:7652

Date

07/04/2015

Pubmed ID

26138368

Pubmed Central ID

PMC4506511

DOI

10.1038/ncomms8652

Scopus ID

2-s2.0-84936791909 (requires institutional sign-in at Scopus site)   180 Citations

Abstract

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. Furthermore, protein phosphatase 6 (ppp6c), a negative regulator that restricts the G1 to S phase progression, is diminished in human psoriatic epidermis and is directly targeted by miR-31. The inhibition of ppp6c is functionally important for miR-31-mediated biological effects. Moreover, NF-κB activation inhibits ppp6c expression directly through the induction of miR-31, and enhances keratinocyte proliferation. Thus, our data identify NF-κB-induced miR-31 and its target, ppp6c, as critical factors for the hyperproliferation of epidermis in psoriasis.

Author List

Yan S, Xu Z, Lou F, Zhang L, Ke F, Bai J, Liu Z, Liu J, Wang H, Zhu H, Sun Y, Cai W, Gao Y, Su B, Li Q, Yang X, Yu J, Lai Y, Yu XZ, Zheng Y, Shen N, Chin YE, Wang H

Author

Xue-Zhong Yu MD Professor in the Microbiology and Immunology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adult
Aged
Aged, 80 and over
Animals
Cytokines
Epidermis
Female
Gene Expression Regulation
Humans
Hyperplasia
Keratinocytes
Male
Mice
Mice, Transgenic
MicroRNAs
Middle Aged
NF-kappa B
Phosphoprotein Phosphatases
Psoriasis
RNA, Messenger
Reverse Transcriptase Polymerase Chain Reaction
Young Adult