OALib Journal期刊
ISSN: 2333-9721
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基于“有故无殒”的何首乌对正常和肝损伤大鼠的毒性与保护作用对比研究
, PP. 973-979
Keywords: 何首乌,肝损伤,有故无殒,双向作用,炎症因子
Abstract:
本研究采用正常和ccl4致慢性肝损伤模型大鼠,何首乌给药剂量分别为生药10和20g·kg-1,考察何首乌50%醇提物对大鼠的一般状态、生化指标、细胞因子及组织病理的影响,并通过因子分析方法综合评价不同剂量何首乌在不同大鼠模型上的量-效/毒应答差异。结果显示,与正常对照组相比,正常高剂量组丙氨酸转氨酶(alt)、总胆红素(tbil)、高迁移率族蛋白1(hmgb-1)和白细胞介素-1β(il-1β)显著升高(p<0.05或p<0.01),肝脏病理切片可见炎细胞浸润、肝窦扩大及纤维条索形成;与模型对照组相比,模型低剂量组alt、天冬氨酸转氨酶(ast)和总胆汁酸(tba)显著下降(p<0.05),肝脏病理切片显示肝细胞空泡变性有所减轻,但仍可见大量炎细胞浸润和纤维组织增生,而模型高剂量组hmgb-1、肿瘤坏死因子-α(tnf-α)和il-1β显著下降(p<0.05或p<0.01),肝细胞空泡变性、炎细胞浸润及纤维化程度都明显减轻。因子分析结果表明,低剂量何首乌对正常大鼠的损伤作用以及对模型大鼠的保护作用均不明显;高剂量的何首乌对正常大鼠的损伤作用表现在公因子-1(hmgb-1、tnf-α和il-1β为主要贡献)和公因子-2(tbil、alt和tba为主要贡献)均显著升高,与正常对照组差异显著;高剂量对模型大鼠的保护作用主要表现在公因子-1显著下降,提示高剂量何首乌可显著降低炎症因子的表达。结果表明,何首乌对肝脏的作用具有“有故无殒”现象,表现为高剂量何首乌可导致正常动物肝损伤,但对于慢性肝损伤模型动物具有肝保护和治疗作用。
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