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Resident and monocyte-derived Langerhans cells are required for imiquimod-induced psoriasis-like dermatitis model.

 Minseok Lee  ;  Sung Hee Kim  ;  Tae-Gyun Kim  ;  Jeyun Park  ;  Jae Won Lee  ;  Min-Geol Lee 
 Journal of Dermatological Science, Vol.91(1) : 52-59, 2018 
Journal Title
 Journal of Dermatological Science 
Issue Date
Dendritic cells ; Langerhans cells ; Psoriasis ; γδT cells
BACKGROUND: Langerhans cells (LCs) are dendritic cells that reside in the epidermis and local inflammation results in an increased differentiation of monocyte-derived LCs. Only few studies have investigated on the role of LCs in psoriasis-like dermatitis model, but the results are variable and the exact role of LCs in psoriasis model remains to be elucidated. OBJECTIVE: To explore the functional role of resident (rLCs) and monocyte-derived LCs (mLCs) in imiquimod (IMQ)-induced psoriasis-like inflammation using human Langerin-diphtheria toxin subunit A (huLang-DTA) mice. METHODS: 5% IMQ cream was topically applied on the skins. Clinical and histopathological features were evaluated. Psoriasis-related gene expression was analyzed by quantitative polymerase chain reaction. The production of psoriasis-related cytokines including IL-17A and IL-22 by T cells were assessed by flow cytometry from the lesional skins. RESULTS: huLang-DTA mice showed a common depletion of both rLCs and mLCs in the IMQ-treated skins. huLang-DTA mice had a reduced IMQ-induced psoriasis-like inflammation featuring erythema, scale, and thickness compared with wild-type mice. Psoriatic lesions from huLang-DTA mice had a decreased level of Il23a and accordingly demonstrated an attenuated cytokine production of IL-17A and IL-22 from γδlow T cells. mLCs revealed a significantly greater level of IL-23 expression compared to rLCs in response to topical IMQ treatment. CONCLUSION: Although both rLCs and mLCs are involved in the development of IMQ-induced psoriasis-like dermatitis, inflammation-induced mLCs present a superior capacity for producing IL-23 in this murine experimental model of psoriasis.
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Dermatology (피부과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
Kim, Tae-Gyun(김태균) ORCID logo https://orcid.org/0000-0002-2116-4579
Park, Jeyun(박제연)
Lee, Min Geol(이민걸) ORCID logo https://orcid.org/0000-0001-7040-5335
Lee, Jae Won(이재원)
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