荧光法测定芦荟康胶囊中芦荟大黄素和芦荟苷

目的用荧光光度法测定芦荟康胶囊中的芦荟大黄素和芦荟苷的含量。方法在pH为5.76的HAcNaAc缓冲液中和十二烷基磺酸钠(SDS)表面活性剂存在下测定芦荟大黄素的λex和λem。在Na2B4O7NaOH介质中测定芦荟苷的λex和λem。结果芦荟大黄素和芦荟苷浓度分别在1.0×106～2.5×105mol/L和1.0×106～2.0×105mol/L,与其荧光强度呈线性关系,检测限分别为2×108mol/L和1×108mol/L。芦荟大黄素的λex和λem分别为460,550nm,芦荟苷在此体系无荧光;芦荟苷的λex和λem分别为387,533nm,芦荟大黄素在此体系无荧光。结论该法灵敏度高,选择性和重现性好,可直接测定芦荟康胶囊中芦荟大黄素和芦荟苷的含量。     

高效液相色谱法同时测定芦荟中芦荟苷和芦荟大黄素的含量

目的:建立用高效液相色谱法同时测定芦荟中芦荟苷和芦荟大黄素含量的方法.方法:采用ZORBAXSA-C18柱(5 μm,200 mm×4.6 mm),以甲醇-水(体积比60:40)溶液为流动相,在360 nm处测定芦荟苷的含量,在430 nm处测定芦荟大黄素的含量.结果:芦荟苷在线性范围0.002～0.050 mmol/L内线性关系良好(r=0.999 74),精密度良好(RSD=0.24%),平均加样回收率为102.5%(RSD=1.1%);芦荟大黄素在线性范围0.001～0.040 mmol/L内线性关系良好(r=0.999 77),精密度良好(RSD=0.39%),平均加样回收率为101.4%(RSD=1.0%).结论:该方法快速、简便、准确,能同时测定芦荟苷和芦荟大黄素的含量.     

高效毛细管电泳法测定决明子及决明子茶中大黄素和芦荟大黄素的含量

目的　建立简单、快速且能同时分离测定决明子及决明子茶中大黄素、芦荟大黄素含量的胶束毛细管电泳法。方法　采用高效毛细管电泳法 ,缓冲体系为 15 0mmol/L硼砂 30 0mmol/LSDS 10 %乙醇 (pH 9 6 0 ) ,熔融石英毛细管柱 (5 0cm× 75 μm) ,分离电压为 2 0kV ,检测波长为 2 5 4nm ,温度为 (2 5± 0 3)℃ ,进样时间为 5s。 结果　大黄素、芦荟大黄素在 4～ 12 0 μg/mL、10～ 2 0 0 μg/mL与峰面积线性关系良好 ,大黄素和芦荟大黄素平均回收率分别为 98 6 %和 10 2 9%。结论　该方法简单、快速、准确、重现性好 ,可用于决明子药材及决明子茶的质量控制     

高效液相色谱法测定小鼠血浆中芦荟大黄素的浓度

目的：建立以高效液相色谱法测定小鼠血浆中芦荟大黄素浓度的分析方法。方法：取0.3ml小鼠血浆,二氯甲烷萃取;HPLC采用Agilent 1100高效液相色谱仪系统,以Symmetry Shield RPC18为色谱柱,流动相为甲醇-水-醋酸（65∶35∶0.2）,并用荧光法测定（λex=410nm和λem=510nm）。结果：芦荟大黄素的保留时间为11.7min;芦荟大黄素浓度在10～1000ng/ml（r=0.999）的范围内具有良好的线性关系,最低检测限（LOD）和最低定量限（LOQ）分别为4.5ng/ml和5ng/ml。结论：本方法简便,准确,灵敏,特异性强,重现性好,可用于血浆中芦荟大黄素的测定及药动学研究。     

HPLC法测定库拉索芦荟中芦荟苷的含量

目的: 建立用反相高效液相色谱测定库拉索芦荟中芦荟苷含量的方法.方法: 采用高效液相色谱法,以ZORBAX-C18(4.6 mm×150 mm,5 μm)为色谱柱,流动相为甲醇-1 g/L水-磷酸缓冲液(45∶55∶0.5),检测波长为356 nm,流速1.0 mL/min,柱温25℃.结果: 芦荟苷在0.596～11.9 mg范围内与峰面积呈良好线性关系,r=0.9996(P<0.05),芦荟苷平均加样回收率为97.8%,RSD为1.02%(n＝6).结论: 试验结果表明,本方法可靠性高,准确性和重现性好,适用于库拉索芦荟中芦荟苷的含量测定.     

双波长分光光度法测定双黄连注射液中黄芩甙的含量

本文介绍了用双波长分光光度法测定双黄连注射液中黄芩甙的含量。测定波长为275nm,参比波长为335nm,ΔA与黄芩甙的浓度呈线性关系,回归方程式为:μg/ml=28.725·ΔA-0.4489,r=0.9994,平均回收率为100%±0.9,用本法测定检品10批。平均含黄芩甙3.0mg/ml。此法不经分离测定了黄芩甙的含量,方法简便,准确,可作医院内部控制含量指标使用。     

芦荟气雾剂的制备与质量控制

目的：制备芦荟气雾剂,建立其质量控制方法。方法：以喷射总量、稳定性等为指标,通过正交试验筛选芦荟气雾剂的处方。用等吸收点双波长分光光度法测定芦荟气雾剂中芦荟苷含量。结果：筛选得到优化处方为：芦荟50%、乙醇40%、甘油5%混合后,压入二甲醚用量25%。芦荟苷线性范围0.8×10-24.4×10-2mg/ml,回收率为98.3%101.5%,RSD为0.50%0.71%,芦荟大黄素对测定不影响。结论：所筛选的处方稳定可行。芦荟苷测定方法简便可靠,重现性好,对芦荟气雾剂质量控制提供方法。     

芦荟大黄素对MPP＋诱导的SH-SY5Y细胞凋亡的保护作用

目的 研究芦荟大黄素对MPP＋诱导的人神经母细胞株SH-SY5Y细胞损伤的神经保护作用.方法 采用体外SH-SY5Y细胞培养的方法,建立SH-SY5Y神经细胞MPP＋损伤模型.通过观察细胞形态,测定细胞存活率（MTT法）,检测芦荟大黄素对SH-SY5Y神经细胞损伤的保护作用.结果 同正常对照组细胞相比,MPP＋损伤模型组细胞活性明显降低;同模型组比较,浓度为2 μmol/L、4 μmol/L、6 μmol/L、8 μmol/L的芦荟大黄素能减轻MPP＋引起的SH-SY5Y神经细胞的损伤,明显提高细胞的存活率.结论 芦荟大黄素对MPP＋诱导的SH-SY5Y细胞损伤具有保护作用.     

头孢拉定颗粒溶出度测定方法研究

目的:建立紫外分光光度法测定头孢拉定颗粒溶出度的方法.方法:以0.1 mol/L盐酸溶液900 ml为溶出介质,采用桨法,转速为75 r/min,紫外分光光度法测定溶出量,检测波长为255 nm.结果:在5～40μg/ml浓度范围内,线性关系良好(r=0.999 6).RSD为0.21%(n=6).结论:本方法简便、准确,可用于头孢拉定颗粒溶出度的测定.     

升华硫的含量测定

目的 :用紫外分光光度法测定升华硫的含量。方法 :取升华硫 0 .1g,加氢氧化钾 -稀乙醇 (1→ 10 )溶液 5 ml,于80℃水浴中加热溶解 ,然后用水制成含硫 6 0～ 12 0 μg/ ml的溶液 ,在 (36 8± 2 ) nm波长处测定。结果 :升华硫在 6 0～12 0μg/ ml浓度范围内 ,线性关系良好 (r=0 .9997) ,平均回收率为 10 0 .78% (n=5 ) ,RSD=1.5 %。结论 :紫外分光光度法测定升华硫的含量操作简单 ,重现性好 ,结果准确 ,值得推广。     

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.     

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.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.