Mitochondrial Reactive Oxygen Species Are Essential for the Development of Psoriatic Inflammation

Soichi Mizuguchi, Kazuhito Gotoh, Yuya Nakashima, Daiki Setoyama, Yurie Takata, Shouichi Ohga, Dongchon Kang

Research output: Contribution to journalArticlepeer-review

Abstract

Psoriasis is a common immune-mediated, chronic, inflammatory skin disease that affects approximately 2-3% of the population worldwide. Although there is increasing evidence regarding the essential roles of the interleukin (IL)-23/IL-17 axis and dendritic cell (DC)-T cell crosstalk in the development of skin inflammation, the contributions of mitochondrial function to psoriasis are unclear. In a mouse model of imiquimod (IMQ)-induced psoriasiform skin inflammation, we found that hematopoietic cell-specific genetic deletion of p32/C1qbp, a regulator of mitochondrial protein synthesis and metabolism, protects mice from IMQ-induced psoriatic inflammation. Additionally, we demonstrate that p32/C1qbp is an important regulator of IMQ-induced DC activation, both in vivo and in vitro. We also found that p32/C1qbp-deficient DCs exhibited impaired production of IL-1β, IL-23, and mitochondrial reactive oxygen species (mtROS) after IMQ stimulation. Because the inhibition of mtROS suppressed IMQ-induced DC activation and psoriatic inflammation, we presume that p32/C1qbp and mtROS can serve as therapeutic targets in psoriasis.

Original languageEnglish
Pages (from-to)714897
JournalFrontiers in Immunology
Volume12
DOIs
Publication statusPublished - 2021

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