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华北理工大学基础医学院,唐山 063210
李 涵,Email:13589178031@163.com,研究方向:多器官功能障碍综合征发病机制和防治。
杨秀红,Email:yangxiuhong@ncst.edu.cn。
收稿:2025-04-18,
修回:2025-05-27,
录用:2025-06-24,
纸质出版:2025-10-28
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李涵,于文龙,杨兆丰,等.蒲公英多糖对多器官功能障碍综合征大鼠肺肠损伤炎症反应及S100A8/A9表达的影响[J].重庆医科大学学报,2025,50(10):1399-1407.
Li Han,Yu Wenlong,Yang Zhaofeng,et al.Effect of dandelion polysaccharide on inflammatory response and expression of S100 calcium binding protein A8/A9 in lung and intestinal injuries in rats with multiple organ dysfunction syndrome[J].Journal of Chongqing Medical University,2025,50(10):1399-1407.
李涵,于文龙,杨兆丰,等.蒲公英多糖对多器官功能障碍综合征大鼠肺肠损伤炎症反应及S100A8/A9表达的影响[J].重庆医科大学学报,2025,50(10):1399-1407. DOI: 10.13406/j.cnki.cyxb.003908.
Li Han,Yu Wenlong,Yang Zhaofeng,et al.Effect of dandelion polysaccharide on inflammatory response and expression of S100 calcium binding protein A8/A9 in lung and intestinal injuries in rats with multiple organ dysfunction syndrome[J].Journal of Chongqing Medical University,2025,50(10):1399-1407. DOI: 10.13406/j.cnki.cyxb.003908.
目的
2
观察蒲公英多糖(dandelion polysaccharide,DP)对大鼠多器官功能障碍综合征(multiple organ dysfunction syndrome,MODS)肺、小肠组织炎症反应及S100钙结合蛋白A8/A9(S100 calcium-binding protein A8/A9,S100A8/A9)表达的影响。
方法
2
应用失血性休克及腹腔注射脂多糖“二次打击”的方法,构建大鼠MODS模型,分为假手术组、模型组、DP低剂量组、DP高剂量组。观察各组大鼠肺和小肠脏器系数及湿/干重比值;苏木精-伊红(hematoxylin-eosinstaining,HE)染色观察肺和小肠组织病理形态学改变;免疫组织化学染色观察肺和小肠组织白细胞介素(interleukin,IL)1β、IL-6、IL-10的表达;蛋白质免疫印迹法(Western blot)检测肺和小肠组织S100A8/A9蛋白表达变化。
结果
2
与假手术组相比,模型组大鼠肺脏系数(5.849±0.824)、湿/干重比值(6.556±0.631)和小肠湿/干重比值(6.356±0.535)、湿重/长度比值(73.950±5.569)均上升。HE染色显示肺泡腔及肺间质可见大量炎细胞浸润,肺泡壁增厚;小肠绒毛崩解碎裂,可见炎细胞浸润及节段性集合淋巴滤泡增生。S100A8/A9主要表达于中性粒细胞和巨噬细胞,大鼠肺和小肠组织S100A8/A9、IL-1β、IL-6表达上调,IL-10表达下调。给予高剂量DP治疗后,大鼠肺脏系数(4.297±0.462)、湿/干重比值(5.313±0.495)和小肠湿/干重比值(5.398±0.388)、湿重/长度比值(59.417±2.891)均下降。肺和小肠组织病理损伤减轻,肺和小肠组织S100A8/A9、IL-1β、IL-6表达下调,IL-10表达上调。
结论
2
DP可能通过抑制S100A8/A9的表达,减轻大鼠MODS肺和小肠组织损伤的炎症反应。
Objective
2
To investigate the effect of dandelion polysaccharide(DP) on inflammatory response and the protein expression of S100 calcium binding protein A8/A9(S100A8/A9) in lung tissue and small intestinal tissue of rats with multiple organ dysfunction syndrome (MODS).
Methods
2
The two-hit method of hemorrhagic shock and intraperitoneally injected lipopolysaccharide was used to establish a rat model of MODS,and the rats were divided into sham-operation group,model group,low-dose DP group,and high-dose DP group. The organ coefficient and wet/dry weight ratio of the lung and the small intestine were observed for each group of rats; HE staining was used to observe the pathomorphological changes of lung tissue and small intestinal tissue; immunohistochemical staining was used to measure the expression of interleukin-1β(IL-1β),interleukin-6 (IL-6),and interleukin-10(IL-10) in lung tissue and small intestinal tissue; Western blot was used to measure the protein expression level of S100A8/A9 in lung tissue and small intestinal tissue.
Results
2
Compared with the sham-operation group,the model group had significant increases in the organ coefficient of the lung(5.849±0.824),the wet/dry weight ratio of the lung(6.556±0.631),the wet/dry weight ratio of the small intestine(6.356±0.535),and the wet weight/length ratio of the small intestine(73.950±5.569). HE staining showed that that the model group had massive inflammatory cell infiltration in alveolar space and pulmonary interstitium,thickened alveolar wall,and disintegration and fragmentation of the villi of the small intestine,with inflammatory cell infiltration and proliferation of segmental aggregated lymphoid follicles. In the model group,S100A8/A9 was mainly expressed in neutrophils and macrophages,and there were increases in the expression of S100A8/A9,IL-1β,and IL-6 and a reduction in the expression of IL-10 in the lung tissue and small intestinal tissue of rats. After treatment with high-dose DP,there were reductions in the organ coefficient of the lung(4.297±0.462),the wet/dry weight ratio of the lung (5.313±0.495),the wet/dry weight ratio of the small intestine(5.398±0.388),and the wet weight/length ratio of the small intestine (59.417±2.891). The high-dose group also had alleviation of pathological injury in the small intestine,with reductions in the expression of S100A8/A9,IL-1β,and IL-6 and an increase in the expression of IL-10 in lung tissue and small intestinal tissue.
Conclusion
2
DP may alleviate inflammatory response in lung and small intestinal injuries of rats with MODS by inhibiting the expression of S100A8/A9.
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