黄芪百合颗粒对亚硝酸钠中毒小鼠增强缺氧耐受力的作用及机制

摘要

Objective To study the effect of Astragali Lilium Granules on the survival time,CAT,ATP,and pathological changes in mice exposed to sodium nitrite (NaNO2)poisoning.Methods We randomly divided 60 male mice of SPF grade KM into blank group,positive control group,model group and Astragali Lilium Granules low-,medium-and high-dose groups.After 3 days of normal feeding,blank group and model group received intragastric gavage of normal saline,and positive control group was given Rhodiola rosea capsule solution.Astragali Lilium Granules groups received intragastric gavage according to the concentration (1.75,3.5 and 7 mg/kg per day) for 30 days. One hour after the last administration, all groups except the blank control group received intraperitoneal injection of NaNO2(200 mg/kg,injection amount of 0.1 mL/g).We recorded the mice's survival time,observed the pathological changes of brain,lung and heart tissues by HE staining under the microscope.The activity of CAT and the level of ATP in brain tissue were determined by colorimetric analysis.Results Compared with the blank group,the survival time in model group [(9.64±1.60)min,P＜0.05]was significantly lower;in model group,the lung tissue showed extensive pulmonary edema,red cell exudation,emphysema,and local atrophy of the lung;the interstitium of the myocardium was dilated and congested,and the local cells in the epicardium became edematous and denatured;brain cells showed necrosis,cytoplasm condensation,pyknosis,and perinuclear vacuoles.The tissues were loose and the spaces between the vessels and nerve cells widened;the activity of CAT decreased and the content of ATP decreased in lung,heart and brain tissues (P＜0.05).Compared with the model group,the survival time was significantly prolonged in Astragali Lilium Granules low-[(12.78±2.20)min]and medium-dose [(13.22±2.10)min]groups (P＜0.05).Compared with model group,the three dose groups had lessened lung tissue edema and emphysema,cardiac interstitial vascular dilatation and congestion,necrosis and nuclear pyknosis of brain nerve cells;the activity of CAT increased and the content of ATP increased in lung,heart and brain tissues (both P＜0.05).Conclusion Astragali Lilium Granules can improve the toxicity of NaNO2in mice and thus effectively protect against NaNO2-induced anoxic injury.%目的 观察黄芪百合颗粒对亚硝酸钠(NaNO2)中毒小鼠存活时间、肺、心脑组织病理形态学、过氧化氢酶(CAT)和三磷酸腺苷(ATP)的影响.方法 将60只SPF级KM种雄性小鼠常规饲养3 d后随机分组,空白组和模型组均灌胃生理盐水,阳性对照组给予红景天枸杞胶囊液,黄芪百合颗粒低、中、高剂量组分别按照 1.75 、3.5 、7 mg/(kg·d)剂量灌胃,1 次/d,连续 30 d.末次给药 1 h后,除空白对照组外,其余各组按200 mg/kg腹腔注射亚硝酸钠,注射量为0.2 mL.记录小鼠存活时间;HE染色观察肺、心、脑组织的病理形态学改变;采用比色分析法测定肺、心、脑组织中过氧化氢酶(CAT)活性和三磷酸腺苷(ATP)含量.结果 与空白组比较,模型组小鼠存活时间明显降低[(9.64 ± 1.60)min,P＜0.05];肺泡组织出现扩张、融合,肺间质内红细胞渗出,肺泡壁受压变窄;心肌间质血管扩张充血严重,心外膜下局部细胞水肿变性;脑组织出现脑神经细胞坏死,核固缩,且出现核周空泡现象,组织疏松,血管及神经细胞周围间隙增宽;肺、心、脑组织CAT活性降低(P＜0.05),ATP 含量降低(P＜0.05 );与模型组比较,黄芪百合颗粒低[(12.78±2.20)min]、中剂量组[(13.22±2.10)min]小鼠存活时间明显延长(P＜0.05),黄芪百合颗粒低、中、高剂量组小鼠肺泡组织扩张、肺间质红细胞渗出均不同程度减轻,心间质血管扩张充血不同程度减轻,脑组织神经细胞、核固缩现象不同程度减轻;肺、心、脑组织CAT活性增强(P＜0.05 )、ATP 含量升高(P＜0.05 ).结论 黄芪百合颗粒对小鼠 NaNO2中毒性缺氧损伤具有保护作用.