Therapeutic Effect of C-C Chemokine Receptor Type 1 (CCR1) Antagonist BX471 on Allergic Rhinitis

文献类型： 外文期刊

第一作者： Feng, Suoyi

作者： Feng, Suoyi;Ju, Longzhu;Shao, Ziqi;Feng, Suoyi;Grzanna, Mark;Shao, Ziqi;Jia, Lu;Liu, Ming

作者机构：

关键词： allergic rhinitis (AR); inflammation; C-C chemokine receptor type 1 antagonist; cytokines; chemokines

期刊名称：JOURNAL OF INFLAMMATION RESEARCH （ 影响因子：6.922； 五年影响因子：6.638 ）

ISSN：

年卷期： 2020 年 13 卷

页码：

收录情况： SCI

摘要： Objective and Design: Allergic rhinitis (AR) is an immunoglobulin E (IgE)-mediated inflammatory respiratory hypersensitivity characterized by elevated Th2 cytokines and infiltration of inflammatory cells to nasal tissues. BX471 is a small-molecule C-C chemokine receptor type 1 (CCR1) antagonist involved in suppression of inflammation via blocking of primary ligands. In this study, we examined the anti-inflammatory effect of BX471 on ovalbumin (OVA)-induced AR mice model. Materials and Methods: Levels of OVA-specific IgE and Th1 cytokines were determined by enzyme-linked immunosorbent assay (ELISA). Nasal expression of proinflammatory mediators was assessed by real-time polymerase chain reaction (RT-qPCR). Nasal-cavity sections were stained with hematoxylin and eosin (HE) and periodic acid-Schiff (PAS) to study eosinophil infiltration and goblet cell metaplasia. Relative protein levels of Nuclear Factor kappa-light-chain-enhancer of activated B cells (NF-kB), Toll-like Receptor 4 (TLR4) and Toll-like-receptor 2 (TLR2) were assessed by Western Blot. Percentage of CD4(+)CD25(+)Foxp3(+) T regulatory cells (Treg) was measured by flow cytometry. Results: Mice treated with BX471 showed significantly relieved sneezing and nasal-rubbing behaviors. The expression of nasal proinflammatory factors was significantly downregulated by BX471, and protein levels of tumor necrosis factor alpha (TNF- alpha) and NF-kB were suppressed. Blockade of CCR1 ligands inhibited eosinophil recruitment in nasal cavity. In addition, Treg cells population were upregulated in BX471-treated mice. Conclusion: BX471 exerts anti-inflammatory effects in a mouse model of AR by inhibiting CCR1-mediated TNF-alpha production, which subsequently suppresses NF-kB activation in inflammatory cells, leading to a decrease in Th2 cytokines, IL-1 beta, VCAM-1, GM-CSF, RANTES, and MIP-1 alpha expression levels, thus inhibiting eosinophil recruitment to nasal mucosa. In addition, BX-471 exhibits anti-allergic effect by increasing Treg cell population. Overall, BX471 represents a promising therapeutic strategy against AR.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序