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1.
本文对硫代脯氨酸(Thioproline)的毒性进行了初步研究。结果表明:小白鼠一次经口的LD_(50)为276.06mg/kg;亚急性毒性试验提示在50~200mg/kg范围内对大白鼠无明显毒性;小白鼠骨髓PCE微核试验结果也显示对小鼠无致突变作用。实验表明,硫代脯氨酸属于中毒化合物,在正常使用剂量范围内对大、小鼠均无明显毒作用。  相似文献   

2.
目的探讨苯甲酸硫代脯氨酸稀土三元配合物的体外抗菌效果,为苯甲酸硫代脯氨酸稀土三元配合物的开发应用提供实验依据。方法圆形滤纸片抑菌圈法。以溶剂二甲基甲酰胺为对照,以抑菌圈大小来评价三元配合物对酵母菌、大肠杆菌和金黄色葡萄球菌的抑菌活性的高低。结果苯甲酸硫代脯氨酸稀土三元配合物对酵母菌、大肠杆菌、金黄色葡萄球菌的抑制效果比配体好,三种配合物对酵母菌、大肠杆菌和金黄色葡萄球菌的抑制效果依次是:Ce(C7H5O2)2(C4H6SO2N)·2H2O>Sm(C7H5O2)2(C4H6SO2N)·2H2O>La(C7H5O2)2(C4H6SO2N)·2H2O。结论苯甲酸硫代脯氨酸稀土三元配合物具有较强的抗菌作用。  相似文献   

3.
本研究采用黄体细胞孵育的方法,观察了硫代脯氨酸对离体黄体细胞孕酮生成的影响,及此影响与cAMP的关系,研究表明硫代脯氨酸呈剂量依赖性抑hCG诱导的黄体细胞孕酮分泌;当硫代脯氨酸浓度为2.4mg/ml时,30min后即发生明显地抑制孕酮分泌作用(P<0.01);硫代脯氨酸同时也是显降低黄体细胞cAMP产生。结果显示,在黄体细胞体外培养条件下,硫代脯氨酸可能通过降低cAMP产生而抑制hCG的生孕酮作用。  相似文献   

4.
硫代脯氨酸的实验研究进展   总被引:5,自引:0,他引:5  
硫代脯氨酸(Thioproline又名Norgamem,Hepalidine,Heparegene ATC,Detoxepa,Thiazolidin,Thiazic acid)为抗肿瘤药物之一。1980年2月西班牙M.Gosa'lvez发现硫代脯氨酸(T)加到肿瘤组织培养溶液中,能使癌细胞逆转而保持正常生长。经Asturias综合医院肿瘤研究室A、Brugarolas试用于临床,发现该药的广泛剂量完全无毒,对头部和颈部的表皮样癌有显著的抗肿瘤作用;对其它区域的表皮样癌  相似文献   

5.
本文按S.Ratner提供的方法,将L—胱氨酸还原成L—半胱氨酸,再与甲醛反应合成硫代脯氨酸。经微量元素分析、熔点、比旋光度、红外光谱和质谱确证。硫代脯氨酸为癌细胞逆转的药物,已试用于临床治疗晚期恶性肿瘤。  相似文献   

6.
目的研究bFGF寡核苷酸被硫代修饰后对肿瘤细胞增殖的影响。方法设计、合成bFGF寡核苷酸,用聚乙烯亚胺(jetPEI)介导bFGF寡核苷酸转染入黑色素瘤B16细胞和白血病L1210细胞,MTT法检测细胞增殖;微分干涉荧光显微镜观察硫代寡核苷酸在细胞中的定位;流式细胞仪分析寡核苷酸转染效率。结果正/反义硫代寡核苷酸被jetPEI介导成功转染入B16细胞和L1210细胞,在B16细胞均主要分布于细胞核,在L1210细胞分别主要分布于细胞核和细胞质。反义硫代寡核苷酸呈剂量依赖地抑制B16与L1210细胞增殖,且核苷酸突变能降低其对2种肿瘤细胞的增殖抑制。相应非修饰反义寡核苷酸也能显著抑制2种细胞增殖。正义硫代寡核苷酸能呈剂量依赖效应显著影响B16细胞增殖,显著高于非修饰正义寡核苷酸,且其抑制作用并未因核苷酸突变而降低。正义硫代寡核苷酸并不显著L1210细胞增殖,与非修饰正义寡核苷酸的效应基本一致。结论硫代修饰并未明显影响bFGF反义寡核苷酸在细胞内特异性结合核酸的性质,硫代反义寡核苷酸仍能以反义机制抑制肿瘤细胞增殖,但硫代修饰可能改变了bFGF正义寡核苷酸的某些性质。致使其于细胞内以一种非核酸特异性机制影响肿瘤细胞增殖。  相似文献   

7.
四种熏蒸剂杀虫灭鼠效果评价   总被引:2,自引:0,他引:2  
目的 :目前广泛应用卫生检疫对货物、集装箱、交通工具等熏蒸消杀工作的四种熏蒸剂有溴化甲烷、硫酰氟、磷化铝、虫菌畏 (环氧乙烷与二氧化碳的混合物 ) ,本文对这四种熏蒸剂的熏蒸效果及其影响因素进行了综合评价。影响每种熏蒸剂的主要因素有 :自身的理化特性 ,环境的温湿度 ,使用剂量 ,封闭时间和熏蒸对象等。硫酰氟除虫剂量小于除鼠剂量 ,不仅使用浓度小封闭时间短 ,且可于低温环境使用 ,毒性小散毒快。其它三种熏蒸剂除虫剂量大于除鼠剂量 ,使用浓度大封闭时间较长 ,不适于低温环境使用 ,安全性差毒性大。就船舶除虫除鼠而言应首选硫酰氟 ,而消毒集装箱、废旧物品应首选虫菌畏。  相似文献   

8.
杨秀令  梁琳 《实用医技杂志》2008,15(13):1676-1677
目的:对比分析四种方法筛查HIV抗体的检测结果,探索最佳初筛实验方法。方法:用四种方法同时检测我区556例住院患者和HIV自愿咨询检测人员血清并对阳性对照系列稀释血清同时检测。结果:硒标法假阳性率高,敏感性及特异性均低于其它三种方法;PA(明胶颗粒凝集试验)法有较高的灵敏度;ELISA(酶联免疫吸附试验)法第3代、第4代试剂敏感性、特异性均很高。结论:ELISA第3代试剂(双抗原夹心法)仍是实验室进行HIV抗体初筛的首选方法。  相似文献   

9.
目的 制备阿霉素纳米脂质体,并研究其急性毒性和慢性毒性.方法 通过乙醇注入法结合pH梯度法,制备阿霉素纳米脂质体,并通过粒径仪测定其物理化学性质.阿霉素纳米脂质体的长期毒性和慢性毒性则通过昆明小鼠实验进行评价.结果 通过该方法制备的阿霉素纳米脂质体粒径为140~170 nm,包封率高达99.85%.急性毒性实验表明,阿霉素纳米脂质体的LD50为31.69mg/kg,病理结果提示,阿霉素纳米脂质体在0mg/kg和6mg/kg的剂量下未对小鼠各脏器产生明显的毒性;12mg/kg及以上剂量,对小鼠心、肺及肝组织都有一定的毒性,且与剂量大小相关;18mg/kg及更低的剂量下,未见其对小鼠肾脾组织有明显毒性.慢性毒性实验中,与空白对照组比较,6 mg/kg和9mg/kg剂量组小鼠体质量、RBC压积、平均RBC体积、PLT计数和嗜酸性粒细胞百分数及尿素氮含量(BUN)有显著影响(P<0.05).结论 该方法制备的阿霉素纳米脂质体质量稳定,且对动物的毒性具有剂量依赖性.  相似文献   

10.
雪卡毒素两种检测方法的比较研究   总被引:3,自引:0,他引:3  
目的建立雪卡毒素的细胞毒性试验检测和小鼠生物法检测方法,对比评价两种方法的优缺点。方法利用不同浓度的雪卡毒素标准品(P—CTX-1)结合乌苯苷和黎芦定处理小鼠神经母细胞瘤细胞(N-2a),研究和建立毒素剂量与细胞活性的毒性曲线关系式。同时,通过测定昆明系小白鼠的雪卡毒素半数致死剂量LD50和毒素剂量与小鼠死亡时间的关系方程式,建立小鼠生物法检测标准,再分别以两种方法对32份不同月份采集的鱼样品的毒素提取物进行检测,对两种方法检测结果做分析比较。结果细胞毒性试验法检测结果与小鼠生物法检测结果具有一定的相关性,但细胞毒性试验法检测雪卡毒素的检测灵敏度远高于小鼠生物法。结论细胞毒性试验检测法适用于大量样品的初步筛选方法,而小鼠生物法可作为雪卡毒素检测的重要参考方法。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
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.  相似文献   

20.
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.  相似文献   

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