实用医学杂志 ›› 2024, Vol. 40 ›› Issue (3): 316-320.doi: 10.3969/j.issn.1006-5725.2024.03.006

• 基础研究 • 上一篇    下一篇

蟛蜞菊内酯对肺炎链球菌感染的肺泡上皮细胞凋亡及炎症因子分泌的调节作用

丁丽宏1,耿世佳2,王玉杰1()   

  1. 1.内蒙古医科大学附属医院 (呼和浩特 010050 )
    2.内蒙古医科大学基础医学院 (呼和浩特 010110 )
  • 收稿日期:2023-04-24 出版日期:2024-02-10 发布日期:2024-02-22
  • 通讯作者: 王玉杰 E-mail:18604710128@163.com
  • 基金资助:
    内蒙古自治区自然科学基金项目(2022MS08013)

Effects of wedelobata on apoptosis and secretion of inflammatory cytokines in the alveolar epithelium infected by Streptococcus pneumonia

Lihong DING1,Shijia GENG2,Yujie WANG1()   

  1. Inner Mongolia Medical University Affiliated Hospital,Hohhot 010050,China
  • Received:2023-04-24 Online:2024-02-10 Published:2024-02-22
  • Contact: Yujie WANG E-mail:18604710128@163.com

摘要:

目的 分析蟛蜞菊内酯对肺炎链球菌感染的肺泡上皮细胞凋亡及炎症因子分泌的调节作用。 方法 将肺泡上皮细胞A549分为感染组(1 × 108/CFU/mL的肺炎链球菌培养细胞)、对照组(不作处理)、感染+蟛蜞菊内酯低剂量组、中剂量组、高剂量组(10、20、40 μmol/L蟛蜞菊内酯预处理,之后采用1 × 108/CFU/mL的肺炎链球菌培养细胞)。检测细胞凋亡率、凋亡相关蛋白表达量、炎症因子mRNA相对表达量及水平。 结果 与对照组相比,感染组、感染+蟛蜞菊内酯低剂量组、中剂量组、高剂量组凋亡率、Bax、Caspase-3蛋白表达量、IL-6、IL-1β、TNF-α mRNA相对表达量及水平较高,Bcl-2蛋白表达量较低(P <0.05);与感染组相比,感染+蟛蜞菊内酯低剂量组、中剂量组、高剂量组凋亡率、Bax、Caspase-3蛋白表达量、IL-6、IL-1β、TNF-α mRNA相对表达量及水平较低,Bcl-2蛋白表达量较低,且感染+蟛蜞菊内酯高剂量组凋亡率、Bax、Caspase-3蛋白表达量、IL-6、IL-1β、TNF-α mRNA相对表达量及水平最高,Bcl-2蛋白表达量最低(P < 0.05)。 结论 肺炎链球菌感染的肺泡上皮细胞经蟛蜞菊内酯干预后细胞凋亡率下降,炎症因子分泌减少。

关键词: 蟛蜞菊内酯, 肺炎链球菌, 肺泡上皮细胞, 凋亡, 炎症因子

Abstract:

Objective To investigate the regulatory effects of wedelobata on apoptosis and secretion of inflammatory factors in the alveolar epithelial cells infected by Streptococcus pneumoniae. Methods Alveolar epithelial cells A549 were divided into infection group (1 × 108 /CFU/mL cultured cells of Streptococcus pneumoniae), control group (no treatment), infection+wedelolactone low-dose group, middle-dose group and high-dose group (pretreated with wedelolactone at 10, 20 and 40 μmol/L and then cultured cells of Streptococcus pneumoniae at 1 × 108 /CFU/mL). Alveolar epithelial cells A549 were divided into infection group (1 × 108 /CFU/mL cultured cells of Streptococcus pneumoniae), control group (no treatment), infection+wedelolactone low-dose group, middle-dose group and high-dose group (pretreated with wedelolactone at 10, 20 and 40 μmol/L and then cultured cells of Streptococcus pneumoniae at 1 × 108 /CFU/mL). Results Compared with control group, the apoptosis rate, the relative expression levels of Bax, Caspase-3 protein, IL-6, IL-1β and TNF-α mRNA were higher in infection group, infection + wedelolide low dose group, medium dose group and high dose group, while the expression level of Bcl-2 protein was lower (P < 0.05). Compared with the infected group, the apoptosis rate, the relative expression levels of Bax, Caspase-3 protein, IL-6, IL-1β and TNF-α mRNA and the expression levels of Bcl-2 protein were lower in the infected + wedelolide low dose, medium dose and high dose groups. Moreover, the apoptosis rate, the expression levels of Bax, Caspase-3 protein, IL-6, IL-1β and TNF-α mRNA were the highest in the infected + wedelactone high-dose group, and the expression levels of Bcl-2 protein were the lowest (P < 0.05). Conclusion The apoptosis rate of alveolar epithelial cells infected by Streptococcus pneumoniae decreased and the secretion of inflammatory factors decreased after the intervention of wedelia lactone.

Key words: wedelia chinensis lactone, streptococcus pneumoniae, alveolar epithelial cells, apoptosis, inflammatory factor

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