白头翁皂苷B4基于调节巨噬细胞极化对小鼠溃疡性结肠炎的影响

被引:21
作者
孙洁 [1 ]
史肖华 [1 ]
李彩云 [2 ]
季士亮 [2 ]
机构
[1] 江苏省苏州科技城医院消化内科
[2] 江苏省苏州科技城医院药学部
关键词
白头翁皂苷B4; 溃疡性结肠炎; 巨噬细胞; 极化;
D O I
10.20047/j.issn1673-7210.2023.07.05
中图分类号
R285.5 [中药实验药理];
学科分类号
100806 [中药药理学];
摘要
目的 探究白头翁皂苷B4基于调节巨噬细胞极化对葡聚糖硫酸钠(DSS)诱导的溃疡性结肠炎(UC)小鼠的作用。方法 将40只SPF级雄性C57BL/6小鼠(体重18~20 g)按随机数字表法分为对照组、模型组、B4组和阳性药组,每组10只。模型组、B4组和阳性药组连续给予3%DSS 5 d构建UC模型,造模成功后B4组灌胃白头翁皂苷B4(5 mg/kg,1次/d),阳性药组灌胃美沙拉秦(400 mg/kg,1次/d),对照组和模型组灌胃等量生理盐水,四组均连续干预7 d。观察干预期间小鼠体重的变化。干预结束后对小鼠结肠组织进行苏木精-伊红染色并进一步评估其病理组织学指数,并对四组炎症相关指标进行检测。q RT-PCR检测四组结肠组织中核因子κB(NF-κB)p50、p65及M1型巨噬细胞特异性指标诱生型一氧化氮合酶(iNOS)、M2型巨噬细胞特异性指标精氨酸-1(Arg1)的mRNA表达水平。对四组结肠组织进行免疫组织化学染色,观察四组结肠组织中巨噬细胞极化的情况。结果 模型组干预6、9、12 d的体重均低于对照组,B4组干预12 d的体重高于模型组(P<0.05或P<0.01)。对照组黏膜层肠腺排列整齐,无溃疡性病变;模型组肠黏膜层隐窝及上皮大部分丧失,并伴有大量炎症细胞浸润、炎症侵及黏膜层和黏膜下层;B4组结肠黏膜具有轻微炎症,溃疡和出血症状明显减少,上皮和隐窝较为完整,结肠黏膜损伤也得到显著改善。模型组病理组织学指数、肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-1β、IL-6水平及核因子κB(NF-κB)p50、NF-κBp65、i NOS mRNA表达水平高于对照组,IL-10、转化生长因子-β(TGF-β)水平及Arg1 mRNA表达水平低于对照组(P<0.05)。B4组病理组织学指数、TNF-α、IL-1β、IL-6水平及NF-κBp50、NF-κBp65、i NOS mRNA表达水平低于模型组,IL-10、TGF-β水平及Arg1 mRNA表达水平高于模型组(P<0.05)。模型组M1型巨噬细胞比例高于对照组,M2型巨噬细胞比例低于对照组,B4组M1型巨噬细胞比例低于模型组,M2型巨噬细胞比例高于模型组(P<0.05)。结论 白头翁皂苷B4可通过抑制M1型巨噬细胞极化,促进M2型巨噬细胞极化,改善肠道炎症环境,缓解UC。
引用
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页码:27 / 31
页数:5
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