实用医学杂志 ›› 2023, Vol. 39 ›› Issue (19): 2461-2468.doi: 10.3969/j.issn.1006-5725.2023.19.009

• 基础研究 • 上一篇    下一篇

基于TLR4-NF-κB信号通路的槐果碱改善人支气管上皮细胞炎症和黏液高分泌的机制

姜盛楠1,支文冰1,张红1,王晓婷1,孙婷婷1,许宗仁1,陈静2,李晔1,刘洋1()   

  1. 1.陕西省中医药研究院(陕西省中医医院) (西安 710003 )
    2.陕西中医药大学 (陕西 咸阳 712046 )
  • 收稿日期:2023-04-25 出版日期:2023-10-10 发布日期:2023-11-22
  • 通讯作者: 刘洋 E-mail:liuyang311111@163.com
  • 基金资助:
    陕西省重点研发计划(2021ZDLSF04-06);陕西省自然科学基础研究计划(2023-JC-QN-0820);陕西省“秦药”研发重点实验室(2021-QYPT-001);秦创园中医药创新研发转化项目(2022-QCYZH-006);陕西中医药大学省级中医体质与疾病防治研究重点实验室(KF2209)

Mechanism of Sophocarpine on improving inflammation and mucous hypersecretion of human bronchial epithelial cells based on TLR4⁃NF⁃κB signaling pathway

Shengnan JIANG1,Wenbing ZHI1,Hong ZHANG1,Xiaoting WANG1,Tingting SUN1,Zongren XU1,Jing CHEN2,Ye LI1,Yang. LIU1()   

  1. *.Shanxi Academy of Traditional Chinese Medicine (Shanxi Traditional Chinese Medicine Hospital),Xi'an 710003,China
  • Received:2023-04-25 Online:2023-10-10 Published:2023-11-22
  • Contact: Yang. LIU E-mail:liuyang311111@163.com

摘要:

目的 基于TLR4-NF-κB信号通路探讨槐果碱(SC)体外抗炎作用及其抗哮喘的潜在效应机制。 方法 采用脂多糖(LPS)刺激人支气管上皮细胞NCI-H292诱导体外炎症模型,给予不同浓度SC进行治疗。采用MTT法筛选LPS和SC对NCI-H292细胞的安全浓度;设Control组、LPS组(10 μg/mL LPS)、SC组(10 μg/mL LPS+不同浓度SC),ELISA法检测细胞中黏蛋白5AC(MUC5AC)的表达和上清液中白细胞介素-6(IL-6)和白细胞介素-8(IL-8)的分泌情况;RT-PCR法检测细胞中MUC5AC、IL-6、IL-8、髓样分化因子(MyD88)和核因子-κB(NF-κB p65)mRNA的表达;Western blot方法检测细胞中Toll样受体4(TLR4)、肿瘤坏死因子受体相关蛋白6(TRAF6)、磷酸化p38(p-p38)和磷酸化p65(p-p65)以及细胞核内NF-κB p65的蛋白表达。 结果 MTT结果显示,LPS和SC分别在0 ~ 10 μg/mL、0 ~ 40 μg/mL浓度范围内对细胞活力无影响;ELISA结果表明,与Control组相比,LPS组细胞中MUC5AC含量极显著升高(P < 0.01),细胞上清液中IL-6、IL-8也极显著升高(P < 0.01);与LPS组相比,SC组细胞中MUC5AC含量极显著降低(P < 0.01),细胞上清液中IL-6、IL-8也极显著降低(P < 0.01);RT-PCR结果显示,与Control组相比,LPS组细胞中MUC5AC、IL-6、IL-8、MyD88和NF-κB p65 mRNA表达均极显著升高(P < 0.01),而SC组细胞中MUC5AC、IL-6、IL-8 mRNA的表达显著降低(P < 0.05),MyD88和NF-κB p65 mRNA的表达极显著降低(P < 0.01)。Western blotting结果表明,SC可极显著降低LPS诱导的NCI-H292细胞中TRAF6、TLR4、p-p38和p-p65以及细胞核内NF-κB p65蛋白表达(P < 0.01)。 结论 SC可能通过抑制TLR4-NF-κB信号通路,改善气道炎症和黏液高分泌,进而发挥抗哮喘的作用。

关键词: 槐果碱, NCI-H292细胞, TLR4-NF-κB信号通路, 炎症, 黏液高分泌

Abstract:

Objective To investigate the anti-inflammatory effect of sophocarpine (SC) in vitro and the potential mechanism of its anti-asthma effect based on the TLR4-NF-κB signaling pathway. Methods NCI-H292 cells were stimulated by Lipopolysaccharide (LPS) to induce inflammation model in vitro, and SC was given in different concentrations. The safe concentrations of LPS and SC on NCI-H292 cells were screened by MTT method, and the control group, LPS group (10 μg/mL LPS) and SC group (10 μg/mL LPS+ different concentrations of SC) were set up. The expression of mucin 5AC (MUC5AC) in cells and the secretion of Interleukin-6(IL-6) and Interleukin-8(IL-8) in the supernatant were detected by ELISA. The mRNA expression of MUC5AC, IL-6, IL-8, myeloid differentiation factor 88(MyD88) and nuclear factor-kappa B p65(NF-κB p65) in cells was detected by RT-PCR. The protein expression of TLR4, tumor necrosis factor receptor-associated factor 6 (TRAF6), p-p38 and p-p65 in cells and NF-κB p65 in nucleus was detected by Western blotting. Results MTT results showed that LPS and SC had no effect on cell viability in the concentration range of 0 ~ 10 μg/mL and 0 ~ 40 μg/mL. The results of ELISA showed that the content of MUC5AC in LPS group was significantly higher than that in control group (P < 0.01), and the levels of IL-6 and IL-8 in the supernatant of cells were also extremely significant increase (P < 0.01). Compared with the model group, the content of MUC5AC in SC group extremely significant reduction (P < 0.01), and the content of IL-6 and IL-8 in cell supernatant also significantly reduced (P < 0.01). RT-PCR results showed that the expressions of MUC5AC, IL-6, IL-8, MyD88 and NF-κB p65 mRNA in LPS group were extremely significant higher than those in control group (P < 0.01), however, the expression of MUC5AC, IL-6 and IL-8 mRNA in SC group decreased significantly (P < 0.05), and the expression of MyD88 and NF-κB p65 mRNA extremely significant reduction (P < 0.01). Western blotting results showed that SC could extremely significant reduction the expression of TRAF6, TLR4, p-p38 and p-p65 in NCI-H292 cells induced by LPS and the expression of NF-κB p65 protein in nucleus (P < 0.01). Conclusion SC may play an anti-asthmatic role by inhibiting TLR4-NF-κB signaling pathway, improving airway inflammation and mucous hypersecretion.

Key words: sophocarpine, NCI-H292 cells, TLR4-NF-κB signal pathway, inflammation, mucus hypersecretion

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