The anti-inflammatory activity of regulatory cytokine IL-37 in atopic dermatitis
Refereed conference paper presented and published in conference proceedings


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AbstractObjective: The anti-inflammatory activity of IL-1 family regulatory cytokine IL-37 in atopic dermatitis (AD) was investigated.
Methods: Human eosinophils (EOS) and dermal fibroblast (HDF) co-culture was used to investigate inflammatory cytokine/chemokine secretion, while the autophagy signaling proteins were analysed by Western blot. CRISPR/Cas9 human IL37 knock-in mice were bred for MC903-induced AD model in vivo.
Results: IL-37 significantly inhibited IL-6 and CXCL8 production in co-culture and autophagy related protein expression (p< 0.05). No autophagy process was detected in either EOS or HDF alone culture, thereby suggesting interaction between EOS and HDF is essential for the autophagy mechanism in the resolution of allergic inflammation. Ear swelling was reduced 10.79 and 15.32% in IL-37 knock-in mice on Day 15 and 17 comparing with wild type mice, respectively. The EOS number in ear of IL-37 knock-in group was much lower than that of control group. Importantly, IL-37 significantly ameliorated the itching state, which is an intolerable AD clinical feature, with the change in gut metabolites. Adoptive transfer of T cells from IL-37 knock-in mice can reduce the AD-related inflammation in recipient mice. AD-related cytokines and chemokines expression in serum and ear tissue was much lower, while Treg cells in spleen was much higher in IL-37 knock-in group comparing with control group, thereby suggesting IL-37 can reduce allergic inflammation by increasing immunosuppressive Treg cells in vivo.
Conclusion: IL-37 could significantly ameliorate MC903-induced AD symptom by inhibiting eosinophils infiltration and allergic inflammation. It suggests that IL-37 can be a promising anti-inflammatory cytokine for AD treatment.
Acceptance Date19/10/2019
All Author(s) ListWong CK, Hou TH, Hon KL, Zhu J, Lam CWK
Name of Conference17th International Congress of Immunology
Start Date of Conference19/10/2019
End Date of Conference23/10/2019
Place of ConferenceBeijing
Country/Region of ConferenceChina
Proceedings TitleEuropean Journal of Immunology
Year2019
Month10
Volume Number49
Issue NumberSuppl 3
PublisherWiley
Pages730 - 730
ISSN0014-2980
LanguagesEnglish-United States

Last updated on 2020-05-08 at 00:56