吉林大学学报(医学版) ›› 2022, Vol. 48 ›› Issue (3): 668-675.doi: 10.13481/j.1671-587X.20220315

• 基础研究 • 上一篇    

重楼皂苷Ⅶ通过抑制NF-κB信号通路对重症急性胰腺炎大鼠急性肺损伤的保护作用

万朝辉1,曾良1,周辉2,李晶3,雷长城3()   

  1. 1.南华大学衡阳医学院附属第二医院急诊科,湖南 衡阳 421001
    2.南华大学衡阳医学院附属第三医院急诊科,湖南 衡阳 421900
    3.南华大学衡阳医学院附属第二医院心血管内科,湖南 衡阳 421001
  • 收稿日期:2021-09-10 出版日期:2022-05-28 发布日期:2022-06-21
  • 通讯作者: 雷长城 E-mail:qtfcb6547@163.com
  • 作者简介:万朝辉(1978-),男,湖南省衡阳市人,主治医师,医学硕士,主要从事急危重症相关的诊治方面的研究。
  • 基金资助:
    湖南省教育厅科研项目(19C1618);湖南省卫健委科研项目(20200881)

Protective effect of polyphyllin on acute lung injury in rats with severe acute pancreatitis by inhibiting NF-κB signaling pathway

Zhaohui WAN1,Liang ZENG1,Hui ZHOU2,Jing LI3,Changcheng LEI3()   

  1. 1.Department of Emergency,Second Affiliated Hospital,Hengyang Medical School,University of South China,Hengyang 421001,China
    2.Department of Emergency,Third Affiliated Hospital,Hengyang Medical School,University of South China,Hengyang 421900,China
    3.Department of Cardiovascular Diseases,Second Affiliated Hospital,Hengyang Medical School,University of South China,Hengyang 421001,China
  • Received:2021-09-10 Online:2022-05-28 Published:2022-06-21
  • Contact: Changcheng LEI E-mail:qtfcb6547@163.com

摘要: 目的

观察重楼皂苷Ⅶ(PP Ⅶ)对重症急性胰腺炎(SAP)大鼠急性肺损伤的保护作用,并探讨其可能作用机制。

方法

将75只大鼠随机分成假手术组、模型组、地塞米松组(阳性对照,给予2 mg·kg-1地塞米松)、低剂量PP Ⅶ组(给予50 mg·kg-1 PP Ⅶ)和高剂量PP Ⅶ组(给予150 mg·kg-1 PP Ⅶ),每组15只。除假手术组外,其他各组大鼠采用逆行胆胰管注射5%牛磺胆酸钠溶液法建立SAP大鼠模型,术后立即给予相应药物处理。检测各组大鼠动脉血氧合指数(OI)和肺组织湿/干质量(W/D)比值,ELISA法检测各组大鼠血清脂肪酶和淀粉酶水平及支气管肺泡灌洗液(BALF)中白细胞介素1β(IL-1β)、白细胞介素6(IL-6)和肿瘤坏死因子α(TNF-α)水平,HE染色观察各组大鼠胰腺组织和肺组织病理形态表现,Western blotting法检测各组大鼠肺组织中核因子-κB(NF-κB)信号通路相关蛋白表达水平。

结果

与假手术组比较,模型组大鼠胰腺和肺组织损伤严重,动脉血OI值明显降低(P<0.01),肺组织W/D比值、血清脂肪酶和淀粉酶水平、BALF中IL-1β、IL-6和TNF-α水平及肺组织中核因子-κB抑制因子α(IκBα)和磷酸化NF-κB(p-NF-κB) p65 (Ser536)蛋白表达水平明显升高(P<0.01);与模型组比较,地塞米松组和高剂量PP Ⅶ组大鼠胰腺组织和肺组织损伤程度得到明显改善,动脉血OI比值明显升高(P<0.01),肺组织W/D比值、血清脂肪酶和淀粉酶水平、BALF中IL-1β、IL-6和TNF-α水平及肺组织中IκBα和p-NF-κB p65 (Ser536)蛋白表达水平明显降低(P<0.01)。

结论

PP Ⅶ可能通过抑制NF-κB信号通路对SAP大鼠急性肺损伤发挥保护作用。

关键词: 重楼皂苷Ⅶ, 重症急性胰腺炎, 急性肺损伤, 核因子κB信号通路, 炎症因子

Abstract: Objective

To observe the protective effect of polyphyllin Ⅶ (PP Ⅶ) on acute lung injury of the rats with severe acute pancreatitis (SAP), and to explore its possible mechanism.

Methods

Seventy-five rats were randomly divided into sham operation group, model group, dexamethasone group (positive control, given 2 mg·kg-1 dexamethasone ), low dose of PP Ⅶ group (given 50 mg·kg-1 PP Ⅶ), and high dose of PP Ⅶ group (given 150 mg·kg-1 PP Ⅶ), and there were 15 rats in each group. Except sham operation group,the SAP rat models were established by retrograde biliopancreatic tube injection of 5% sodium sulfonate solution in the rats in the other groups.The rats were immediately treated with the corresponding drugs. The arterial blood oxygenation index (OI) and wet weight/dry weight (W/D) ratio of lung tissue of the rats in various groups were measured. The levels of lipase and amylase in serum and the levels of interleukin1β (IL-1β),interleukin 6 (IL-6),andtumor necrosis factor(TNF-α)in bronchoalveolar lavage fluid (BALF) of the rats in various groups were detected by ELISA method; HE staining was used to observe the pathomophology of pancreas tissue and lung tissue of the rats in various groups,and the expression levels of nuclear factor-κB(NF-κB) signaling pathway related proteins in lung tissue of the rats in various groups were detected by Western blotting method.

Results

Compared with sham operation group, the pancreas tissue and lung tissue of the rats in model group were severely damaged,the OI value of arterial blood was significantly decreased (P<0.01), while the W/D ratio of lung tissue, levels of lipase and amylase in serum, levels of IL-1β, IL-6 and TNF-α in BALF, and the expression levels of inhibitor of nucler factor-κB α(IκBα) and phosphorylated NF-κB(p-NF-κB) p65(Ser536) proteins in lung tissue were significantly increased (P<0.01). Compared with model group, the damage degree of pancreas tissue and lung tissue of the rats in dexamethasone group and high dose of PP Ⅶ group was significantly improved, the OI values of arterial blood were significantly increased (P<0.01), and the W/D ratios of lung tissue, levels of lipase and amylase in serum,levels of IL-1β, IL-6 and TNF-α in BALF, and the expression levels of IκBα and p-NF-κB p65(Ser536) proteins in lung tissue were significantly decreased (P<0.01).

Conclusion

PP Ⅶ may play a protective role in acute lung injury of the SAP rats by inhibiting the NF-κB signaling pathway.

Key words: Polyphyllin Ⅶ, Severe acute pancreatitis, Acute lung injury, nuclear transcription factor-κB signaling pathway, Inflammatory cytokine

中图分类号: 

  • R576