Synergistic Protection of Danhong Injection (丹红注射液) and Ischemic Postconditioning on Myocardial Reperfusion Injury in Minipigs

Objective: To explore the synergistic protection of Danhong Injection (丹红注射液,DHI) and ischemic postconditioning on myocardial reperfusion injury in minipigs.Methods: Acute myocardial infarction model was made by balloon occlusion in left anterior descending coronary artery (LAD) of minipigs,and then postconditioning was simulated through inflation/deflation of the angioplasty balloon.Minipigs were divided into four groups: the sham operation group (SH group),the ischemia/reperfusion group (I/R group),the ischemic postconditioning group (POC group) and DHI combined with ischemic postconditioning group (PAD group,DHI 20 mL through ear vein),six in each group.After 24-h continuous observation,myocardial infarction size was assessed by triphenyltetrazolium staining (TTC).Morphological changes of ischemic myocardium were observed by light microscopy,and cardiomyocyte ultrastructure was studied with electron microscopy.The superoxide dismutase (SOD) and malondialdehyde (MDA) activity in heart homogenates were measured by a biochemical method.Results: The myocardial infarction size was smaller in the POC group than in the I/R group (0.26±0.02 vs.0.37±0.09,P0.05),and the PAD group (0.14±0.08) displayed a significantly reduced infarction size relative to the I/R group (P0.01) and POC group (P0.05).The damage of myocardial tissue was severe in the I/R group shown by light and electron microscopy: myocardial fibers disorder,sarcoplasmic dissolution,myofilament fracture,mitochondria swelling and even vacuolization formation and a large number of inflammatory cell infiltrations.Compared with the I/R group,reduction of reperfusion injury in the PAD group included more orderly arranged myocardial fibers,less infiltration of inflammatory cells and maintenance of mitochondrial integrity.Compared with the I/R group,the damage of myocardial tissue in the POC group was improved,but not as significant as that in the PAD group.SOD levels in the POC group and the PAD group were significantly higher than those in the I/R group (96.96±13.43,112.25±22.75 vs.76.32±10.63,P0.05),and MDA was significantly lower in the POC group and the PAD group compared to the I/R group (1.27±0.19,1.09±0.21 vs.1.47±0.16,P0.05).Conclusion: DHI and ischemic postconditioning show a synergistic cardioprotection on myocardial reperfusion injury in minipigs.     

RP-HPLC法测定西洋参茎叶中二醇皂苷5种成分含量

目的建立反相高效液相色谱法(RP-HPLC)同时测定西洋参茎叶二醇皂苷中5个成分(人参皂苷Rb1、Rc、Rb2、Rb3、Rd)含量测定方法。方法采用高效液相色谱法。色谱柱AgilentTC-C18(4.6mm×250mm,5μm);乙腈-0.2%磷酸水溶液为流动相梯度洗脱;检测波长203nm;体积流量1.0ml/min;柱温40℃。结果5种成分均达到基线分离,线性良好。人参皂苷Rb1、Rc、Rb2、Rb3、Rd平均回收率分别为98.39%、97.36%、98.02%、97.70%、97.01%。结论该方法能快速、准确地测定西洋叁茎叶二醇皂苷5种成分的含量,而且重复性好。     

西洋参果总皂甙与人参果总皂甙的定性鉴别

西洋参果总皂甙与人参果总皂甙的定性鉴别集安制药厂（１３４２００）尹笠签，刘艳通化师范学院尹尚军在人参的根、茎、叶、花、果相继被利用的同时，人们正在推出以西洋参果为主要原料的系列产品。由于人参果与西洋参果的药性不同，单体皂甙的含量也有差异，因而呈现不同...     

基于网络化管理的生化实验技术创新教学模式研究与实践

随着网络技术的发展,如何利用网络平台创新教学模式是当今课程改革热点。本文以生化实验技术实验课程教学为研究对象,构建了符合本课程递进式设计的实践课程模块体系和创新能力培养的网络化管理、自主合作式实验教学模式,形成以能力为核心的全过程、多元化评价体系,为推进网络化教学管理、资源利用及自主合作式教学方法在教学实践中的应用,进一步促进学生创新能力培养提供借鉴。