桂枝茯苓丸调控核因子-κB通路治疗溃疡性结肠炎机制研究
陈敏 , 佟美丽 , 贾煜 , 苏震宇 , 金秋宇
长春中医药大学学报 ›› 2026, Vol. 42 ›› Issue (5) : 564 -571.
桂枝茯苓丸调控核因子-κB通路治疗溃疡性结肠炎机制研究
Study on the mechanism of Guizhi Fuling Pills regulating the nuclear factor-κB pathway in the treatment of ulcerative colitis
目的 探讨经典方剂桂枝茯苓丸通过调控核因子-κB(NF-κB)信号通路治疗溃疡性结肠炎(UC)的作用机制。 方法 将40只C57BL/6雄性小鼠随机分为空白组、模型组、美沙拉嗪组及桂枝茯苓丸高、低剂量组。除空白组外,其余各组均采用自由饮用3%葡聚糖硫酸钠(DSS)溶液连续7 d建立UC模型。造模成功后,各给药组分别予以美沙拉嗪75 mg·kg-1、桂枝茯苓丸273 mg·kg-1、136.5 mg·kg-1灌胃干预7 d,期间记录小鼠疾病活动指数(DAI)。实验结束后测量结肠长度,通过苏木素-伊红(HE)染色观察结肠组织病理形态变化,采用ELISA法检测血清炎症因子白细胞介素(IL)-6、IL-1β及肿瘤坏死因子-α(TNF-α)水平,Western blot检测结肠组织中NF-κB抑制蛋白α(IκBα)、NF-κB p65及TNF-α蛋白表达,免疫组化法检测紧密连接蛋白Claudin-3(CLDN3)的表达与分布。 结果 与空白组比较,模型组DAI评分、结肠组织损伤程度、血清IL-6、IL-1β及TNF-α水平均显著升高(P<0.01),结肠组织NF-κB p65蛋白表达上调,IκBα与CLDN3蛋白表达下调(P<0.01);与模型组比较,桂枝茯苓丸可显著改善UC小鼠一般状态,降低DAI评分(P<0.05),缓解结肠缩短(P<0.05),修复结肠黏膜病理损伤,减轻炎症细胞浸润;同时显著降低血清IL-6、IL-1β、TNF-α水平(P<0.01),上调结肠组织IκBα、CLDN3蛋白表达(P<0.01),抑制NF-κB p65及TNF-α蛋白表达(P<0.01)。 结论 桂枝茯苓丸可有效缓解DSS诱导的小鼠溃疡性结肠炎,其作用机制与抑制NF-κB信号通路活化、减少下游促炎因子释放,并上调紧密连接蛋白CLDN3表达、增强肠黏膜屏障功能有关。
Objective To investigate the mechanism of the classic formula Guizhi Fuling Pills in treating ulcerative colitis (UC) by regulating the nuclear factor kappa-B (NF-κB) signaling pathway. Methods 40 male C57BL/6 mice were randomly divided into the blank group, the model group, the mesalazine group, the high-dose Guizhi Fuling Pill group, and the low-dose Guizhi Fuling Pill group. Except for the blank group, all other groups were given 3% dextran sulfate sodium (DSS) solution ad libitum for 7 consecutive days to establish the UC model. Following successful modeling, each treatment group received intragastric administration of mesalazine (75 mg·kg-1) or Guizhi Fuling Pills (273 mg·kg-1, 136.5 mg·kg-1) for 7 days. Disease activity index (DAI) was recorded during the intervention. After the experiment, colon length was measured. Hematoxylin-eosin (HE) staining was used to observe histopathological changes in colon tisssue. The levels of serum inflammatory factors interleukin (IL)-6, IL-1β, and tumor necrosis factor-alpha (TNF-α) were measured by enzyme-linked immunosorbent assay (ELISA). The expression of NF-κB inhibitory protein α (IκBα), NF-κB p65, and TNF-α in colon tissue was detected by Western Blot, and the expression and distribution of the tight junction protein Claudin-3 (CLDN3) were assessed by immunohistochemistry. Results Compared with the blank group, the model group showed significantly increased DAI scores, severe colonic tissue damage, elevated serum levels of IL-6, IL-1β and TNF-α (P<0.01), upregulated NF-κB p65 protein expression, and downregulated IκBα and CLDN3 protein expression in colon tissue (P<0.01). Compared with the model group, Guizhi Fuling Pills intervention significantly improved the general condition of UC mice, reduced DAI scores (P<0.01), alleviated colon shortening (P<0.05), repaired pathological damage of colonic mucosa, and reduced inflammatory cell infiltration. Simultaneously Guizhi Fuling Pills also significantly reduced serum levels of IL-6, IL-1β and TNF-α (P<0.01), upregulated the protein expression of IκBα and CLDN3 in colon tissue (P<0.01), and inhibited the protein expression of NF-κB p65 and TNF-α (P<0.01). Conclusion Guizhi Fuling Pills can effectively alleviate DSS-induced UC in mice. Its mechanism of action is closely associated with inhibiting the overactivation of the NF-κB signaling pathway, reducing the release of downstream pro-inflammatory factors, and enhancing intestinal mucosal barrier function by upregulating the expression of tight junction protein CLDN3.
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黑龙江省中医药学会青年人才托举工程项目(2022-QNRCI-21)
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