Abstract:
:Type 1 regulatory T (Tr1) cells are CD4+ T cells that produce a large amount of IL-10, an anti-inflammatory cytokine. However, it has not been fully elucidated whether Tr1 cells suppress allergic asthma. In this study, the effects of adoptive transfer of in vitro-induced Tr1 cells on allergic asthma were evaluated. Splenocytes from ovalbumin (OVA)-sensitized BALB/c mice were cultured with OVA, IL-21, IL-27, and TGF-β. After culture, IL-10-producing CD4+ T cells were isolated by Dynabeads mouse CD4 and IL-10 secretion assay, and analyzed by flow cytometry. Purified Tr1 cells (IL-10+ CD4+ T cells) were intravenously injected into OVA-sensitized BALB/c mice. The recipient mice were intratracheally challenged with OVA. Airway hyperresponsiveness to methacholine was assessed by the forced oscillation technique, followed by bronchoalveolar lavage (BAL). Almost all of the induced IL-10-producing CD4+ T cells were negative for interferon-γ, IL-4, IL-17A, and forkhead box P3, suggesting that the cells were Tr1 cells. The adoptive transfer of Tr1 cells significantly suppressed the development of airway hyperresponsiveness, and increases in IL-5, eosinophils, and neutrophils in BAL fluid. In conclusion, we demonstrated that Tr1 cells suppressed allergic asthma in mice.
journal_name
J Pharmacol Scijournal_title
Journal of pharmacological sciencesauthors
Matsuda M,Doi K,Tsutsumi T,Inaba M,Hamaguchi J,Terada T,Kawata R,Kitatani K,Nabe Tdoi
10.1016/j.jphs.2019.10.004subject
Has Abstractpub_date
2019-12-01 00:00:00pages
139-145issue
4eissn
1347-8613issn
1347-8648pii
S1347-8613(19)35722-6journal_volume
141pub_type
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