反相高效液相色谱法测定茶多酚中表没食子儿茶素没食子酸酯的含量

目的采用反相高效液相色谱法测定茶多酚中表没食子儿茶素没食子酸酯(EGCG)的含量。方法以甲醇∶水∶乙酸=26∶73.5∶0.5(体积比)为流动相(1.0mL/min),C18柱(250.0mm×4.6mm,5μm),UV检测器(278nm)。结果EGCG在0.1303￣0.6517mg/mL范围内线性关系良好(r=0.9995),平均回收率为100.26%,RSD为0.86%。结论该法简便、快速,可作为测定茶多酚中EGCG含量的方法。     

绿茶提取物茶多酚抗癌作用的研究进展

绿茶属于不发酵茶,主要成分即茶多酚(green teapolyphenols,GTP)[1]。GTP是多羟基酚类化合物,在茶叶含量为20%～30%,主要成分为儿茶素类(cate-chines)化合物,约占GTP总量的65%～80%。儿茶素类化合物主要含有4种单体:表没食子儿茶素没食子酸酯(epigallocatechin gallate,EGCG)、表儿茶素没食子酸酯(epicatechin gallate,ECG)、表儿茶素(epi-     

表没食子儿茶素没食子酸酯对离体培养乳鼠心肌细胞缺氧复氧的保护作用及机制研究

目的:研究表没食子儿茶素没食子酸酯对离体培养乳鼠心肌细胞缺氧复氧的保护作用及机制。方法:离体培养乳鼠心肌细胞,在用表没食子儿茶素没食子酸酯处理后采用MTT法检测细胞活力,采用Western-blot方法检测KLK1、KLK8的蛋白含量。结果:缺氧复氧组的细胞活力及KLK8蛋白水平均明显低于正常培养组;表没食子儿茶素没食子酸酯处理组的细胞活力及KLK8蛋白水平均明显高于缺氧复氧组;在siRNA敲低KLK8的表达后,心肌细胞的细胞活力发生了明显的降低。结论:表没食子儿茶素没食子酸酯能够通过上调细胞中KLK8的表达来发挥对于离体培养乳鼠心肌细胞缺血再灌注的保护作用。文献引用:陈勇,李欣欣.表没食子儿茶素没食子酸酯对离体培养乳鼠心肌细胞缺氧复氧的保护作用及机制研究[J].中医学报,2013,28(9):1321-1323.     

热淋清糖浆的含量测定研究

目的用高效液相色谱法测定热淋清糖浆中没食子酸的含量。方法采用ODS C18柱(5μm,4.6×250mm),流动相为甲醇—水—N、N二甲基甲酰胺—冰醋酸(1.5:93:3.5:2),检测波长为262nm,流速为1.0mL.min-1,柱温:室温。结果没食子酸在0.105~0.70μg范围内线性关系良好(r=0.9999),方法的回收率为97.16%,RSD为1.04%(n=5)。结论该方法能准确可靠地进行含量测定,能够有效地控制该制剂的含量。     

表没食子儿茶素没食子酸酯药理作用研究进展

表没食子儿茶素没食子酸酯是从绿茶中提取分离的一种多酚类单体化合物,是绿茶中儿茶素类化合物的主要组成部分。近年研究发现,其在体内外具有抗肿瘤、抗氧化、抗炎、降血脂、防辐射等多种重要的生物活性。综述了近5年来对表没食子儿茶素没食子酸酯药理作用及作用机制的研究进展。     

RP-HPLC法测定赤芍药材中没食子酸、儿茶素、芍药苷、芍药内酯苷、苯甲酸

目的建立了用RP-HPLC对赤芍中没食子酸、儿茶素、芍药苷、芍药内酯苷、苯甲酸同时定量的方法,并对不同产地赤芍药材进行考察。方法高效液相色谱法,色谱柱为Waters Sunfire columns C18(150 mm×4.6 mm,5μm),流动相为甲醇-乙腈-0.1%磷酸梯度洗脱;检测波长采用变波长检测;柱温为40℃;进样量为10μL。同时测定了赤芍中没食子酸、儿茶素、芍药苷、芍药内酯苷、苯甲酸的量。结果没食子酸在0.013～0.506μg线性关系良好(r=0.999 6)、儿茶素在0.025～0.993 6μg线性关系良好(r=0.999 7)、芍药苷在0.200～8.017μg线性关系良好(r=0.999 6)、芍药内酯苷在0.030～1.184μg线性关系良好(r=0.999 6)、苯甲酸在0.037～1.485μg线性关系良好(r=0.999 6)。平均回收率没食子酸为98.08%,RSD为1.65%;儿茶素为101.80%,RSD为3.07%;芍药内酯苷为99.18%,RSD为3.25%;芍药苷为95.95%,RSD为1.39%;苯甲酸为101.85%,RSD为1.35%。结论本方法测定了不同产地、不同批号赤芍样品中5种化学成分的量,该方法分离度好,快速,简便,重现性好。     

茶多酚的生物活性及药理学研究进展

茶多酚(tea polyphenols,TP)是茶叶药效的主要活性成分,占茶叶干质量的20%～35%,其主要组分为儿茶素(ca-techins),占其总量的80%左右.茶叶中儿茶素主要为表儿茶素(EC)、表儿茶素没食子酸酯(ECG)、表没食子儿茶素(EGC)、表没食子儿茶素没食子酸酯(EGCG)等,其中EGCG含量最高,占儿茶素的50%左右.儿茶素结构中至少有A、B、C三个环核,是2-苯基苯并吡喃的衍生物. 近年来大量实验研究证实,TP具有消除自由基、抗氧化等生物活性,在抑菌、抗病毒、防癌抗癌、抑制肿瘤、防治心血管疾病等方面具有良好功效.因此,TP作为天然的自由基清除剂及抗氧化剂,在进行天然药物研究与开发上有着较好的前景.笔者就TP的生物活性及药理学研究进展综述如下.     

反相高效液相色谱法测定青荚叶中表儿茶素含量

目的:采用反相高效液相色谱法建立青荚叶中表儿茶素含量的测定方法.方法:用甲醇-水(体积比1:1)为溶剂,超声波法提取青荚叶中的表儿茶素.采用反相高效液相色谱法.色谱条件为:色谱柱:Zorbax XDB-C18柱(4.6 mm×250 mm,5μm);流动相组成:流动相A,400 mL 0,04 mol/L柠檬酸+80 mL N,N-二甲基甲酰胺+20mL四氢呋喃;流动相B,甲醇;流动相的洗脱方式为等强度洗脱:流动相A+B(体积比85:15);流速1.0 mL/min;柱温:35℃;检测器为二极管阵列检测器,检测波长280 nm.采用外标法定量.结果:表儿茶素线性范围为0-364.00 mg/L(r=0.999 9),平均同收率为98.4%,RSD为2.08%(n=3).青荚叶中表儿茶素含量为(5.334±0.111)mg/g.结论:该方法简便、准确且灵敏,适用于青荚叶中表儿茶素含量测定.     

HPLC同时测定六味地黄浓缩丸中4种主要成分的含量

目的:建立一种同时测定六味地黄浓缩丸中丹皮酚、芍药苷、马钱苷、没食子酸4种活性成分含量的方法.方法:应用高效液相法进行测定活性成分的含量,色谱柱为Alltima C18柱(250 mm ×4.6 mm);流动相为乙腈-0.1%甲酸梯度洗脱;流速为0.5 mL/min;检测波长为242 nm;进样量5μL;柱温为30℃.结果:丹皮酚、芍药苷、马钱苷、没食子酸线性范围分别为0.199～3.98μg(r=0.999 8)、0.073～1.172μg(r=0.999 5)、0.145～2.316μg(r=0.999 5)、0.103～1.648 μg(r=0.999 4);平均加样回收率分别为99.35%(RSD=1.22%)、98.16%(RSD=1.57%)、97.30%(RSD=1.77%)、98.96%(RSD=1.16%).结论:本法方便、稳定、可靠,可用于六味地黄浓缩丸的质量控制.     

HPLC法测定不同pH条件下余甘子中4种成分的含量变化*

目的建立同时测定余甘子中4种成分含量的HPLC法,并研究在不同pH条件下4种成分含量变化。方法 采用高效液相色谱法测定余甘子中焦性没食子酸（Pyrogallic acid,PA）、没食子酸（Gallic acid,GA）、1, 3,6-O-三没食子酰基葡萄糖（1,3,6-tri-O-galloyl-β-D-glucose,TGG）和1, 2, 3, 4, 6-O-五没食子酰葡萄糖（1, 2,3, 4, 6-penta-O-galloyl-β-D-glucose,β-PGG）的含量。色谱柱为Agilent Zorbax C18键合硅胶柱(150 mm×4.6 mm,5 μm),流动相为甲醇-0.1%磷酸梯度洗脱,流速为1.0 mL/min,检测波长为280 nm,柱温为25 ℃,进样量为10 μL,测定不同pH条件下4种成分的含量。结果 PA、GA、TGG和β-PGG分别在0.0229～0.2290mg/mL（r=0.9996,n=6）,0.0148～0.1480 mg/mL（r=0.9991,n=6）,0.0018～0.0180 mg/mL（r=0.9998,n=6）,0.0031～0.0310 mg/mL（r=0.9993,n=6）范围内呈良好的线性关系,加样回收率均符合含量测定要求。余甘子中的PA在pH为2时含量最高;GA在pH为5时含量最高;TGG在pH为4时含量最多;β-PGG在pH为3时含量最高。结论 该方法简便、准确,可以用于余甘子中PA、GA、TGG和β-PGG 4个成分的含量测定。通过研究不同pH条件下余甘子中的PA、GA、TGG和β-PGG的含量变化,可为余甘子中相关成分的质控提供一定理论参考。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.