3%苦参碱水剂致突变作用研究

目的 :检测3%苦参碱水剂的致突变作用。方法 :应用鼠伤寒沙门氏菌回复突变试验(Ames试验),小鼠骨髓多染红细胞微核试验,哺乳动物细胞基因(TK位点)突变试验,哺乳动物细胞染色体畸变试验进行3%苦参碱水剂的致突变作用研究。结果 :Ames试验中,3%苦参碱水剂各剂量组回变菌落数均未超过溶剂对照组回变菌落数的2倍;与相应对照组比较,各剂量组3%苦参碱水剂小鼠骨髓多染红细胞微核率未明显增加,未见哺乳动物细胞基因(TK位点)的致突变效应及对哺乳动物细胞染色体畸变作用,差异均无显著性。结论 :在本实验条件下,3%苦参碱水剂未见明显致突变作用。     

"冻干江浙蛇毒"的致突变作用研究

目的:检测"冻干江浙蛇毒"的致突变性,以提供有关致突变的遗传毒性安全评价数据.方法:采用小数骨髓微核试验、微生物回复突变试验(Ames)、仓鼠肺成纤维细胞染色体畸变试验(CHL),研究"冻干江浙蛇毒"的致突变作用.结果:小鼠骨髓微核试验表明,"冻干江浙蛇毒"三个剂量组(1.0、0.5、0.25mg/kg腹腔注射)的微核出现率与阴性对照组(0.9%NaCl)比较无显著性(P＞0.05),与阳性对照组比较有显著性(P＜0.01);Ames试验表明,"冻干江浙蛇毒"采用5000、2500、1250、625和312.5ug/皿剂量时,在加和不加S9条件下,对TA97、TA98、TA100和TA102菌株回复突变菌落数结果为阴性;CHL试验也表明,"冻干江浙蛇毒"4.0、2.0、1.0和0.5ug/ml剂量对中国仓鼠肺成纤维细胞(CHL)体外培养染色体无畸变作用.结论:"冻干江浙蛇毒"无致突变性,有良好的应用前景.     

文蛤肉水解液的致突变性研究

目的 评价文蛤肉水解液的致突变性，为文蛤的开发利用提供实验数据。方法 采用Ames试验、小鼠嗜多染红细胞骨髓微核试验和CHL细胞体外染色体畸变试验3项致突变性试验，检测文蛤肉水解液有无致突变作用。结果 Ames试验中文蛤肉水解液各剂量组回变菌落数均在正常范围内，均未超过自发回变菌落数的2倍，在加与不加S9时5株试验菌株结果为阴性。CHL细胞体外染色体畸变试验，文蛤肉水解液各剂量组的染色体畸变率与阴性对照组比较，差异无统计学意义（P>0.05），结果为阴性。小鼠骨髓微核试验，各剂量组的微核率与阴性对照组比较，差异无统计学意义（P>0.05），结果为阴性。结论 在本试验条件和范围下，文蛤肉水解液未见潜在的致突变作用。     

两种一次性使用输液袋的致突变作用研究

【目的】对一次性使用聚丙烯输液袋和聚氯乙烯输液袋的致突变作用进行初步评价。【方法】应用Ames试验和小鼠骨髓细胞微核试验,研究两种输液袋的致突变作用。【结果】在Ames试验的TA97、TA98、TA100和TA102四个标准菌株±S9mix条件下,两种输液袋在0.5~500.0μg/皿浓度范围内均未诱发菌株回变菌落数明显增加。5.0 mg/kg、10.0 mg/kg和20.0 mg/kg各剂量组,小鼠骨髓嗜多染红细胞微核率与溶剂对照组相比未见明显增加(P>0.05)。【结论】该试验条件下,一次性使用聚丙烯输液袋和聚氯乙烯输液袋无致突变作用。     

猴头多糖(HEPS)遗传毒性评价及抗突变实验研究

目的与方法　采用经典Ames试验评价猴头多糖 (HEPS)的遗传毒性及抗突变作用。结果　HEPS 3 0mg/皿、15mg/皿、7 5mg/皿、3 75mg/皿、1 875mg/皿 5个剂量组在 +S9和 -S9时 ,均未能引起TA 98和TA 10 0两测试菌株回变菌落数增加 ,亦未观察到剂量反应关系。本次研究HEPS 2 0mg/皿、10mg/皿、5mg/皿三个剂量组都可显著抑制阳性物敌克松和叠氮钠引起的TA 10 0回变菌落数增加 (P <0 0 5 )。结论　本实验条件下HEPS致突变作用阴性 ,HEPS具有抗突变作用。     

金麦健(元真)口服液抗肿瘤作用和微生物回复突变的实验研究

用中华麦饭石(CMS)制成浓度为100％的溶液,以补中益气汤和杞菊地黄汤栽化加减的中药组方其提取物浓度为1g/ml,将二者按1:1混合制成金麦健(又名“元真”)口服液,对其进行抗染色体突变、抑制腹水癌的实验研究和微生物回复突变(Ames)实验研究。Amcs实验用鼠伤寒菌株TA97、TA98、TA100及TA102,平皿掺入法,口服液按原液、1:5、1:25,1:125不同浓度投入实验,以诱变菌落数(Rt)与自发回复突变菌落数(Rc)的比值(MR)大于2且诱变作用呈现剂量效应关系时判为阳性。抗染色体突变实验用环磷酰胺作致突变剂(100mg/     

蝙蝠葛酚性碱抗突变作用的研究

目的应用昆明小鼠股骨骨髓嗜多染红细胞微核实验,研究蝙蝠葛酚性碱(phenolic alkaloids from menispermum dauricum,PAMD)的致突变作用和抗突变作用.方法均在10～40 mg/kg剂量下,连续腹腔注射给药11d,在致突变实验,末次给药6 h后处死小鼠,检测骨髓嗜多染红细胞微核率.在抗突变实验,小鼠在于处死前的24 h,腹腔注射40 mg/kg环磷酰胺(cyclophosphamide,CP)或2 mg/kg丝裂霉素C(mitomycinc,MC),末次给药6 h后取样.结果蝙蝠葛酚性碱与对照组相比未诱发骨髓嗜多染红细胞微核率的增高(微核细胞率＜3‰).蝙蝠葛酚性碱可使环磷酰胺和丝裂霉素C诱发的骨髓细胞微核率增高数值出现明显的降低.PAMD CP组微核细胞抑制率分别为61.83%、43.51%和22.52%.PAMD MC组微核细胞抑制率分别为31.09%、21.50%和8.29%.结论蝙蝠葛酚性碱具有一定的抗突变作用,而无致突变作用.     

细胞培养方法制备环磷酰胺致突变模型研究

[目的 ]探讨体外细胞培养制备微核模型的环磷酰胺的适宜剂量 ,为以后的抗突变物质的功能评价提供依据 .[方法 ]进行体外淋巴细胞培养的微核实验 .[结果 ]不同浓度 (2 5,5 0 ,10 0 ,2 0 0mg/L)的环磷酰胺对淋巴细胞导致的微核率和微核分布有不同的影响 ,较低浓度时具有致微核率升高的性质 ,较高浓度的环磷酰胺除具有致突变作用外 ,还能显著地抑制细胞的分裂和生长 .[结论 ] 5 0mg/L的环磷酰胺是细胞培养致突变实验的适宜剂量     

麦绿素遗传毒性实验研究

目的研究麦绿素的遗传毒性。方法污染物臻突变性检测(Ames实验)菌株鼠伤寒沙门菌组氨酸缺陷型TA97、TA98、TA100、TA102,受试物设5个剂量组,分别为0.008、0.04、0.2、1.0、5.0 mg/皿,同时设自发回变和阳性对照;小鼠骨髓嗜多染红细胞微核实验设2.5、5.0、10 g/kg体质量3个剂量组、溶剂对照组和阳性对照组;小鼠精子畸形实验设2.5、5.0、10 g/kg体质量3个剂量组、溶剂对照组和阳性对照组。结果 Ames实验表明受试物对TA97、TA98、TA100、TA102的4株实验菌株无论直接作用[不加大鼠肝微粒体酶(S-9)]或经代谢活化作用(加S-9)均不引起自发回变数增加;小鼠骨髓嗜多染红细胞微核试验表明受试物未使小鼠骨髓嗜多染红细胞微核率发生改变;小鼠精子畸形实验表明受试物未引起小鼠精子畸形率增高。结论在实验条件下,Ames试验、小鼠骨髓嗜多染红细胞微核试验、小鼠精子畸形实验结果均为阴性,认为麦绿素无致突变性。     

成团泛菌低分子脂多糖的遗传毒性研究

目的:研究成团泛菌低分子脂多糖(LPSp)的遗传毒性,为其应用提供安全性毒理学评价依据.方法:应用掺入法进行Ames试验,采用组胺酸缺陷型鼠伤寒沙门氏菌TA97、TA98、TA100、TA102,将试验分为加和不加代谢激活系统S9 2组平行试验,LPSp设100、50、25、12.5、6.25 mg/皿 5个剂量组,通过观察回变菌落数来考察LPSp对鼠伤寒沙门氏菌的遗传毒性.应用小鼠骨髓嗜多染红细胞微核试验,LPSp设40、20、10、5 mg/kg 4个剂量组,通过检测小鼠骨髓嗜多染红细胞微核率来考察LPSp对小鼠体细胞的遗传毒性.结果:在Ames试验中,LPSp各剂量组引起的回变菌落数未超过对照组自发回变菌落数的1倍以上;小鼠骨髓嗜多染红细胞微核试验显示,LPSp4个剂量组的微核发生率均在正常范围内,与阴性对照组比较差异无统计学意义(P＞0.05),与阳性对照组比较差异有统计学意义(P＜0.01).经Ames试验和小鼠骨髓嗜多染红细胞微核试验,LPSp的结果均呈阴性.结论:LPSp对所试菌株和小鼠体细胞无诱变性.     

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.