阿昔洛韦抗柯萨奇病毒B3作用的初步观察

目的观察阿昔洛韦抗柯萨奇病毒B3(CVB3)的作用.方法通过活细胞计数评价阿昔洛韦对Hep-2细胞的细胞毒作用;通过观察病毒感染后的细胞病变效应计算病毒抑制率,评价阿昔洛韦在Hep-2细胞培养中的抗CVB3作用.结果阿昔洛韦对Hep-2细胞的半数细胞毒性浓度(TC50)在0.2mg/mL以上;CVB3的半数抑制浓度TC50为25μg/mL,治疗指数为8.4.结论阿昔洛韦安全性较高并能有效地抑制柯萨奇病毒B3在Hep-2细胞中的增殖.     

4种药用植物提取物体外抗柯萨奇病毒B3作用的研究

目的:研究三叶委陵菜、异叶蛇葡萄、蛇葡萄及细叶卷柏提取物对培养细胞的毒性、抗柯萨奇病毒 B3(CVB3)的作用及其机理。方法:通过观察药物毒性、病毒引起的细胞病变效应、MTT法检测细胞活性,判断药物毒性及药物抗病毒效应。结果:4种药物的半数毒性浓度(TC50)分别为7.2, 8.1, 8.7, 12.4μg·ml-1。三叶委陵菜、异叶蛇葡萄、细叶卷柏可直接杀伤病毒,半数抑制浓度(IC50)分别为0.52, 1.21, 0.53μg·ml-1,治疗指数(TI)分别为14, 6.7, 23;蛇葡萄、细叶卷柏可阻止病毒的吸附,IC50分别为0.56, 0.51μg·ml-1,TI分别为16, 23。药物不能抑制病毒的生物合成。结论:4种药物通过不同机制发挥抗CVB3的作用;但是同时对细胞也有一定的毒性作用,仍需进一步研究有效的抗病毒成份。     

大黄提取液抗柯萨奇病毒B3的实验研究

采用微量细胞培养法观察细胞病变效应 (Cytopathiceffect,CPE) ,测定经不同剂量大黄提取液作用后的病毒滴度 ,用逆转录—聚合酶链反应 (RT PCR)检测药物作用后细胞冻融液中的病毒核酸(CVB RNA) ,研究大黄提取液的抗柯萨奇病毒B组 (CVB)作用 ,探讨其抗病毒作用机制。结果 :不同剂量大黄提取液和病毒作用后 ,细胞均出现CPE ;不同剂量药物作用于细胞后 ,不能阻止CVB3感染 ;当CVB3感染细胞后 ,大黄提取液能阻止病毒增殖 ,并表现出一定的量效关系 ,其治疗指数(TI) =10。提示大黄提取液不能直接杀灭CVB3,不能阻止CVB3吸附、穿入易感细胞 ,而通过阻止CVB3核酸复制或 /和以后环节发挥抗病毒作用。     

MTT法在抗病毒药物筛选中的应用

目的 :采用MTT法评价清热消炎复方制剂体外抗柯萨奇病毒 (CVB3 )、呼吸道合胞病毒 (RSV)效果。方法 :待正常细胞长成单层 ,用病毒感染 ,培养一定时间后 ,根据不同病毒感染细胞出现细胞病变 (CPE)时间的不同 ,加入一定量的MTT液 ,然后测定OD570 值 ,计算病毒抑制率。结果 :MTT法较光镜CPE法更为客观 ,能以OD值变化反映药物对病毒的抑制程度 ,从而获得实验结果 ,且便于统计学处理。结论 :MTT法是一种能广泛应用于抗病毒药物筛选和评价的方法     

青银注射液抗病毒药效学研究

目的:了解青银注射液对常见致病病毒的抑制作用,为临床用药提供理论依据.方法:体外试验,采用组织细胞培养法,观察药物对柯萨奇(CVB3)、疱疹病毒(HSV-Ⅱ)的抑制作用.体内试验,分别用CVB3、HSV-Ⅱ感染小鼠,经腹腔或静脉注射给药,观察小鼠存活天数,评价药物抗病毒作用.结果:体外试验,本品浓度105μg·ml-1以上,对CVB3、HSV-Ⅱ均有抑制作用;体内试验,本品对感染了HSV-Ⅱ的小鼠,4个给药剂量组小鼠存活天数均比阴性对照组明显延长(P<0.01),具有较好的量效关系.结论:青银注射液对疱疹病毒的抑制作用强,而对柯萨奇病毒的抑制作用稍弱.     

抗生素S632A3在体外抗柯萨奇病毒B3m株作用的研究

目的 :体外测定抗生素S632A3 抗柯萨奇病毒B3m 株的作用 ,为筛选新型抗病毒药物提供参考依据。方法 :用不同稀释度的抗生素S632A3 抑制柯萨奇病毒B3m 株对Vero细胞的感染作用 ,48h后观察细胞病变效应 ,并用MTT法测定细胞活性。结果 :抗生素S632A3 能明显抑制柯萨奇病毒对Vero细胞的致病变作用 ,使细胞存活率升高。结论 :该药物有较显著的抗柯萨奇病毒B3m 株的作用 ,且对细胞的毒性低 ,但该药物对柯萨奇病毒B3m 株无预防作用 ,是一种具有潜在开发前景的药物。     

硝酸甘油和硝酸异山梨酯抗柯萨奇病毒的体外实验研究

目的研究硝酸甘油(GTN)和硝酸异山梨酯(ISDN)对柯萨奇B组3型病毒(CVB3)的体外抑制作用。方法用Hela细胞扩增并收获柯萨奇B组3型病毒(CVB3)后,测定CVB3的半数组织培养感染剂量(TCID50)和空斑形成单位(PFU),应用MTT法测定实验所用药物的细胞毒性,用细胞病变效应(CPE)抑制实验和空斑减少实验,观察和分析研究GTN、ISDN对CVB3的抑制作用。结果GTN、ISDN可以明显抑制病毒的细胞病变效应以及空斑形成(P<0.05)。结论GTN、ISDN等临床常用于抗心绞痛的硝酸酯类药物具有明确的抗CVB3感染Hela细胞的作用。     

空心莲子草微乳体外抗柯萨奇病毒B3的实验研究

目的:观察空心莲子草微乳在体外抗柯萨奇病毒B3(CVB3)的作用,为将纳米技术应用于该药的研发提供理论依据。方法:提取空心莲子草抗病毒活性成分并制备成微乳制剂,以高效液相法测定微乳中空心莲子草浓度,测定微乳的粒径及其分布,考察微乳的稳定性,通过细胞实验评价药物的抗病毒作用。结果:微乳的平均粒径为32 nm,具有很好的稳定性,有明显抑制CVB3的作用,治疗指数27.31。结论:空心莲子草微乳有显著的抗CVB3的作用,微乳化的空心莲子草安全性比未经微乳化的高。     

大黄提取液抗柯萨奇病毒B3的实验研究

采用微量细胞培养法观察细胞病变效应(Cytopathic effect,CPE),测定经不同剂量大黄提取液作用后的病毒滴度,用逆转录—聚合酶链反应(RT-PCR)检测药物作用后细胞冻融液中的病毒核酸(CVB-RNA),研究大黄提取液的抗柯萨奇病毒B组(CVB)作用,探讨其抗病毒作用机制。结果不同剂量大黄提取液和病毒作用后,细胞均出现CPE;不同剂量药物作用于细胞后,不能阻止CVB     

栀子等中药抑制柯萨奇B3病毒的体外实验研究

目的探讨栀子、黄连、黄芩、大青叶及复方制剂在体外抗柯萨奇B3病毒(CVB3)的作用。方法用细胞培养技术比较栀子、黄连、黄芩、大青叶及复方制剂等药物对CVB3引起的细胞病变的抑制作用。结果黄芩抗病毒作用最强,治疗指数(TI)为35.09;黄连抑制病毒增殖的作用最强,TI为83;栀子抑制病毒吸附和增殖作用最强,TI为238.09。结论栀子、黄连、黄芩、大青叶及复方制剂等药物对CVB3增殖的不同环节均有抑制作用。     

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.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

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.