天津医药 ›› 2023, Vol. 51 ›› Issue (4): 360-365.doi: 10.11958/20221110

• 实验研究 • 上一篇    下一篇

Let-7e-5p调控Fas/FasL影响小鼠变应性鼻炎发病的机制研究

唐桥斐1(), 曹建秋2, 张爽1,()   

  1. 1 沈阳医学院附属第二医院耳鼻喉科(邮编110002)
    2 沈阳医学院附属第二医院干诊科(邮编110002)
  • 收稿日期:2022-07-14 修回日期:2022-09-22 出版日期:2023-04-15 发布日期:2023-04-20
  • 通讯作者: 张爽 E-mail:tanghuashengmi@163.com;zs_5257@163.com
  • 作者简介:唐桥斐(1977),女,副主任医师,主要从事变应性鼻炎的发病机制及治疗方面研究。E-mail:tanghuashengmi@163.com
  • 基金资助:
    辽宁省科学技术计划项目(2018225020);沈阳市科学技术计划资助项目(21-173-9-17)

Study on the mechanism of let-7e-5p regulating Fas/FasL to affect the pathogenesis of allergic rhinitis in mice

TANG Qiaofei1(), CAO Jianqiu2, ZHANG Shuang1,()   

  1. 1 Department of Otolaryngology, the Second Hospital of Shenyang Medical College, Shenyang 110002, China
    2 Department of Cadre, the Second Hospital of Shenyang Medical College, Shenyang 110002, China
  • Received:2022-07-14 Revised:2022-09-22 Published:2023-04-15 Online:2023-04-20
  • Contact: ZHANG Shuang E-mail:tanghuashengmi@163.com;zs_5257@163.com

摘要:

目的 探讨let-7e-5p对小鼠变应性鼻炎的影响及机制。方法 将18只BALB/c小鼠按随机数字表法均分为对照(Control)组、变应性鼻炎(AR)组、let-7e-5p激动剂阴性对照(AR+agomir-NC)组、let-7e-5p激动剂(AR+agomir)组、let-7e-5p抑制剂阴性对照(AR+antagomir-NC)组和let-7e-5p抑制剂(AR+antagomir)组。除Control组外,其余组应用卵白蛋白(OVA)致敏建立AR模型,AR+agomir组和AR+antagomir组同时给予let-7e-5p agomir或let-7e-5p antagomir进行干预,末次激发致敏后对小鼠变应性鼻炎进行评分,HE染色观察鼻黏膜组织,统计嗜酸性粒细胞数量,real-time PCR检测let-7e-5p、Fas、FasL mRNA表达,Western blot检测Fas、FasL蛋白表达,酶联免疫吸附试验检测血清免疫球蛋白E(IgE)、特异性IgE(sIgE)、干扰素γ(IFN-γ)、白细胞介素(IL)-12、IL-4、IL-13水平,双荧光素酶实验分析let-7e-5p和Fas、FasL的靶向关系。结果 与Control组比较,AR组小鼠变应性鼻炎评分升高,鼻黏膜增生明显,嗜酸性粒细胞数量增加,let-7e-5p mRNA表达及IFN-γ、IL-12水平下降,Fas、FasL表达及IgE、sIgE、IL-4、IL-13水平升高(均P<0.05)。与AR+agomir-NC组比较,AR+agomir组小鼠变应性鼻炎评分降低,鼻黏膜结构清晰,嗜酸性粒细胞数量减少,let-7e-5p mRNA表达及IFN-γ、IL-12水平升高,Fas、FasL表达及IgE、sIgE、IL-4、IL-13水平下降(均P<0.05)。与AR+antagomir-NC组比较,AR+antagomir组小鼠变应性鼻炎评分升高,鼻黏膜增厚,嗜酸性粒细胞数量增加,let-7e-5p mRNA表达减少,Fas、FasL表达及IgE、sIgE、IL-4、IL-13水平升高(均P<0.05),IL-12、IFN-γ水平差异无统计学意义。与NC+3'UTR-WT组比较,let-7e-5p agomir+3'UTR-WT组荧光素酶活性下降(P<0.05)。结论 Let-7e-5p通过靶向调节Fas/FasL影响1型辅助性T细胞(Th1)/2型辅助性T细胞(Th2)平衡,从而参与AR小鼠变应性鼻炎发病的进展。

关键词: 鼻炎,变应性,常年性, 疾病模型,动物, let-7e-5p, Fas, FasL, 1型辅助性T细胞, 2型辅助性T细胞

Abstract:

Objective To investigate the effect and mechanism of let-7e-5p on allergic rhinitis in mice. Methods Eighteen BALB/c mice were randomly divided into the control group, the allergic rhinitis (AR) group, the let-7e-5p agonist negative control (AR+agomir-NC) group, the let-7e-5p agonist (AR+agomir) group, the let-7e-5p inhibitor negative control (AR+antagomir-NC) group and the let-7e-5p inhibitor (AR+antagomir) group. Except the control group, the other groups were sensitized with ovalbumin (OVA) to establish AR model. The AR+agomir group and the AR+antagomir group were treated with let-7e-5p agomir or let-7e-5p antagomir at the same time for intervention. After the last sensitization, the allergic rhinitis of mice were scored. HE staining was used to observe nasal mucosa. The number of eosinophils was counted. Real-time PCR was used to detect mRNA expression levels of let-7e-5p, Fas and FasL, and Western blot assay was used to detect protein expression levels of Fas and FasL. Enzyme-linked immunosorbent assay (ELISA) was used to detect serum levels of immunoglobulin E (IgE), specific immunoglobulin E (sIgE), interferon gamma (IFN-γ), interleukin (IL)-12, IL-4 and IL-13. The targeting relationship between let-7e-5p and Fas and FasL were analyzed by dual luciferase assay. Results Compared with the control group, the allergic rhinitis score was increased in the AR group, nasal mucosa hyperplasia was obvious and the number of eosinophils was increased. The expression levels of let-7e-5p and IFN-γ and IL-12 were decreased, while the expression of Fas and FasL and levels of IgE, sIgE, IL-4 and IL-13 were increased (all P<0.05). Compared with the AR+agomir-NC group, the allergic rhinitis score was decreased in the AR+agomir group, the nasal mucosa structure was clear and the number of eosinophils was reduced. The expression of let-7e-5p and levels of IFN-γ and IL-12 were increased, while the expression of Fas and FasL and levels of IgE, sIgE, IL-4 and IL-13 were decreased (all P<0.05). Compared with the AR+antagomir-NC group, the allergic rhinitis score was increased in the AR+antagomir group, the nasal mucosa was significantly thickened, and the number of eosinophils was increased. The expression of let-7e-5p was decreased, and the expression of Fas, FasL and levels of IgE, sIgE, IL-4 and IL-13 were increased (all P<0.05). There were no significant differences in IL-12 and IFN-γ between the AR+antagomir-NC group and the AR+antagomir group (P>0.05). Compared with the NC+3'UTR-WT group, luciferase activity was decreased in the let-7e-5p agomir+3'UTR-WT group (P<0.05). Conclusion Let-7e-5p may affect the balance of T helper type 1 (Th1)/ T helper type 2 (Th2) cells by targeting Fas/FasL, and thus participate in the progression of AR in mice.

Key words: rhinitis, allergic, perennial, disease models, animal, let-7e-5p, Fas, FasL, T helper type 1, T helper type 2

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