Park A, Lee E, Park H, Park MN, Lee J, Song KB, Yoon J, Jung S, Suh N, Yoon J, Yu J. Innate Type 2 Response to
Aspergillus fumigatus in a Murine Model of Atopic Dermatitis-like Skin Inflammation.
J Korean Med Sci 2021;
36:e261. [PMID:
34664800 PMCID:
PMC8524237 DOI:
10.3346/jkms.2021.36.e261]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 08/22/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND
Atopic dermatitis (AD) is a chronic and relapsing inflammatory skin disease mediated by T helper type 2 (Th2) cells in acute phase. Group 2 innate lymphoid cells (ILCs) play a role in the initiation of the Th2 response. Although mold exposure is associated with the development of AD, studies on the underlying mechanisms are lacking. This study investigated whether group 2 ILCs are involved in inflammation in AD-like skin induced by Aspergillus fumigatus (Af).
METHODS
We investigated changes of group 2 ILCs population in Af-induced AD-like skin lesions. To induce AD-like skin lesions, Af extracts were applied to the dorsal skin of BALB/c and Rag1-/- mice five times per week, with repeat exposures at 2-week intervals.
RESULTS
The clinical parameters were higher in the Af-treated group than in the control group. Histologic findings revealed epiderrmal and dermal thickening as well as eosinophil and mast cell infiltration into the skin of Af-treated mice. Populations of group 2 ILCs in the skin were also significantly higher in the Af-treated group. In addition, interleukin-33 mRNA expression was significantly higher in the skin lesions of the Af-treated mice. In the Rag1-/- mice lacking mature lymphocytes, AD-like skin lesions were still induced by Af and ILCs depletion using an anti-CD90.2 mAb lowered the Af-induced inflammatory response.
CONCLUSIONS
Group 2 ILCs may play a role in a murine model of Af-induced AD-like skin lesions.
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