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[摘要]
目的 探讨通塞脉方取舍怀牛膝对缺血性脑损伤模型大鼠的影响。方法 雄性SD大鼠随机分为假手术组、模型组、尼莫地平(32.4 mg/kg)组、通塞脉全方(生药31.74 g/kg)组、去牛膝通塞脉方(生药27.77 g/kg)组。除假手术组与模型组外,其他给药组大鼠连续ig给药3 d,每天1次。给药后除假手术组外,其他组大鼠制备缺血性脑卒中模型,造模后24 h取血及大脑组织,脑组织以TTC染色,观察梗死率;HE染色观察病理学变化;测定血清中高迁移率组蛋白1(HMGB1)、肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)的量;免疫组化法观察缺血组织中核因子-κB(NF-κB)的表达。结果 模型组大鼠HMGB1、TNF-α、IL-1β的量及NF-κB的表达均明显升高(P<0.05),通塞脉全方及通塞脉去牛膝方均可降低脑缺血大鼠HMGB1、TNF-α、IL-1β的量,抑制NF-κB的表达(P<0.05),其中去牛膝通塞脉方降低IL-1β的作用最强。结论 通塞脉全方及去牛膝通塞脉方均可通过抑制HMGB1相关的NF-κB信号通路的激活,发挥抑制炎症反应、减轻脑水肿、保护神经细胞的作用;去除牛膝的通塞脉方不会降低对脑缺血疗效,在抑制炎症因子IL-1β的分泌方面优于通塞脉方全方。
[Key word]
[Abstract]
Objective To compare the curative effect of Fritillariae Cirrhosae Bulbus (FCB) in six species from five origins on recurrent asthma in mice. Methods Eighty one female Kunming mice were randomly divided into nine groups with equal weights, such as model, control, Dexamethasone (DEX, positive control), and six FCB groups. The mice in the model, DEX, and FCB groups were sc injected with ovalbumin (OVA) on days 1, 7, and 14, then challenged with the aerosols of normal saline contained OVA on days 22-28. The mice in DEX and FCB groups were ig administered with DEX (0.6 mg/kg) and FCB (830 mg/kg) respectively for 28 d, and the mice in the control group were given 0.1% carboxymethyl cellulose. The surface tension of bronchoalveolar lavage was measured, the lung tissues were taken for hematoxylin-eosin (HE) staining, and the tracheal stenosis and volume difference of pulmonary alveolus were analyzed by the microphotograph. Results Compared with the control group, the tracheal stenosis, surface tension, and volume difference of pulmonary alveolus were increased obviously in the model group (P < 0.01). The pathological section revealed vessel wall thickening in bronchiole, inflammatory cell infiltrating, gland hyperplasia, and mucus hypersecretion, but FCB could reverse these pathological changes (P < 0.01). Each FCB had its feature to cure asthma. F. unibracteata and F. delavayi had the most potency on increasing alveolar surfactant; F. unibracteata and F. taipaiensis had the most potency on attenuating tracheal stenosis; F. unibracteata and F. przewalskii had the most potency on relieving the inflammation; F. unibracteata and F. taipaiensis had the most potency on reducing glandular hyperplasia or intimal thickening. Each FCB had its feature to cure asthma, but F. unibracteata was the best. Conclusion FCB has the best potency to prevent and cure the recurrent asthma in mice, but each FCB has its feature. The diversity of FCB species should be protected.
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[基金项目]
国家自然科学基金资助项目(81130069,81274013)