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Modulation of Th1/Th2 Cytokine Balance by Quercetin In Vitro.

ABSTRACT: Background: Allergic rhinitis (AR) is well known to be an IgE-mediated chronic inflammatory disease in the nasal wall, which is primarily mediated by Th2-type cytokines such as IL-4, IL-5, and IL-13. Although quercetin is also accepted to attenuate the development of allergic diseases such as AR, the influence of quercetin on Th2-type cytokine production is not well understood. The present study was designed to examine whether quercetin could attenuate the development of AR via the modulation of Th2-type cytokine production using an in vitro cell culture technique. Methods: Human peripheral-blood CD4+ T cells (1 × 106 cells/mL) were cultured with 10.0 ng/mL IL-4 in the presence or absence of quercetin. The levels of IL-5, IL-13, and INF-? in 24 h culture supernatants were examined by ELISA. The influence of quercetin on the phosphorylation of transcription factors NF-?B and STAT6, and mRNA expression for cytokines were also examined by ELISA and RT-PCR, respectively. Results: Treatment of cells with quercetin at more than 5.0 ?M inhibited the production of IL-5 and IL-13 from CD4+ T cells induced by IL-4 stimulation through the suppression of transcription factor activation and cytokine mRNA expression. On the other hand, quercetin at more than 5.0 ?M abrogated the inhibitory action of IL-4 on INF-? production from CD4+ T cells in vitro. Conclusions: The immunomodulatory effects of quercetin, especially on cytokine production, may be responsible, in part, for the mode of therapeutic action of quercetin on allergic diseases, including AR.

SUBMITTER: Tanaka Y

PROVIDER: S-EPMC7459988 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Modulation of Th1/Th2 Cytokine Balance by Quercetin In Vitro.

Tanaka Yoshihito Y Furuta Atsuko A Asano Kazuhito K Kobayashi Hitome H

Medicines (Basel, Switzerland) 20200730 8

<b>Background:</b> Allergic rhinitis (AR) is well known to be an IgE-mediated chronic inflammatory disease in the nasal wall, which is primarily mediated by Th2-type cytokines such as IL-4, IL-5, and IL-13. Although quercetin is also accepted to attenuate the development of allergic diseases such as AR, the influence of quercetin on Th2-type cytokine production is not well understood. The present study was designed to examine whether quercetin could attenuate the development of AR via the modula ...[more]

PMID: 32751563

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Modulation of Th1/Th2 Cytokine Balance by Quercetin In Vitro.

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Modulation of Th1/Th2 Cytokine Balance by Quercetin In Vitro.

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