PMID- 31953037 OWN - NLM STAT- MEDLINE DCOM- 20200518 LR - 20200518 IS - 1525-2191 (Electronic) IS - 0002-9440 (Linking) VI - 190 IP - 3 DP - 2020 Mar TI - Nuclear Factor Erythroid 2-Related Factor 2 (Nrf2) Regulates Epidermal Keratinization under Psoriatic Skin Inflammation. PG - 577-585 LID - S0002-9440(20)30002-X [pii] LID - 10.1016/j.ajpath.2019.10.022 [doi] AB - Psoriasis is an autoinflammatory/autoimmune skin disease and the epitome of an exaggerated primary inflammatory response in the surface barrier tissue. Despite the efficacy of dimethyl fumarate, an electrophilic drug for psoriasis management, there is a paucity of mechanistic evidence in vivo. In response to electrophiles, the Kelch-like erythroid cell-derived protein with cap-n-collar homology-associated protein 1/nuclear factor erythroid 2-related factor 2 (NRF2) system mediates a myriad of cytoprotective mechanisms, including the regulation of excessive inflammatory response and epidermal differentiation. Because the psoriasiform tissue reaction comprises neutrophil infiltration and parakeratotic scaling, it is hypothesized that Nrf2 not only regulates inflammatory responses but also maintains epidermal differentiation, a hallmark of epidermal homeostasis. By using the imiquimod-induced cutaneous inflammation model, an exaggerated inflammatory response and impaired epidermal differentiation in Nrf2(-/-) mice was detected. Dimethyl fumarate treatment in Nrf2(+/+) mice attenuated a psoriasiform tissue reaction and rescued epidermal differentiation, which was not observed in Nrf2(-/-) mice. In accordance with the fact that psoriasis plaques form well-demarcated parakeratotic lesions in association with the psoriasiform tissue reaction, the lesional skin showed reduced expression levels of NRF2 and its downstream target genes compared with nonlesional skin. In conclusion, Nrf2 attenuates the psoriasiform tissue reaction and underscores the mechanistic legitimacy of the electrophile-based approach for the management of psoriasis. CI - Copyright (c) 2020 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. FAU - Ogawa, Tatsuya AU - Ogawa T AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Ishitsuka, Yosuke AU - Ishitsuka Y AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. Electronic address: yosuke.ishitsuka@md.tsukuba.ac.jp. FAU - Inoue, Sae AU - Inoue S AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Nakamura, Yoshiyuki AU - Nakamura Y AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Saito, Akimasa AU - Saito A AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Okiyama, Naoko AU - Okiyama N AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Fujisawa, Yasuhiro AU - Fujisawa Y AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Furuta, Junichi AU - Furuta J AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Watanabe, Rei AU - Watanabe R AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. FAU - Fujimoto, Manabu AU - Fujimoto M AD - Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200114 PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (NF-E2-Related Factor 2) RN - 0 (Nfe2l2 protein, mouse) RN - P1QW714R7M (Imiquimod) SB - IM MH - Animals MH - Cell Differentiation MH - Cells, Cultured MH - Chimera MH - Epidermis/drug effects/pathology MH - Female MH - Homeostasis/drug effects MH - Humans MH - Imiquimod/*adverse effects MH - Immunohistochemistry MH - Inflammation/chemically induced/*pathology MH - Keratinocytes/pathology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - NF-E2-Related Factor 2/genetics/*metabolism MH - Parakeratosis/chemically induced/*pathology MH - Psoriasis/chemically induced/*pathology MH - Skin/drug effects/pathology EDAT- 2020/01/19 06:00 MHDA- 2020/05/19 06:00 CRDT- 2020/01/19 06:00 PHST- 2019/02/19 00:00 [received] PHST- 2019/10/21 00:00 [revised] PHST- 2019/10/29 00:00 [accepted] PHST- 2020/01/19 06:00 [pubmed] PHST- 2020/05/19 06:00 [medline] PHST- 2020/01/19 06:00 [entrez] AID - S0002-9440(20)30002-X [pii] AID - 10.1016/j.ajpath.2019.10.022 [doi] PST - ppublish SO - Am J Pathol. 2020 Mar;190(3):577-585. doi: 10.1016/j.ajpath.2019.10.022. Epub 2020 Jan 14.