睾丸细胞膜的分离鉴定及hCG受体的检测

本文应用蔗糖密度梯度离心的方法进行大鼠睾丸细胞膜分离,并以此作为膜制剂进行hCG受体的检测。结果显示,用经过蔗糖密度梯度离心方法分离的睾丸细胞膜进行hCG受体放射分析,膜制剂为200μg,30℃孵育4h时,~(125)I-hCG的饱和点为4.5ng。Scatchard分析显示B_(max)=29.59fmol/mg·pr,解离常数kd=3.69×10~(-10)mol/L,具备受体可饱和、低结合容量、高亲和力的特点。因此,我们认为用蔗糖密度梯度离心的方法分离的睾丸细胞膜完全可用于hCG受体的分析。     

冬凌草甲素对β-肾上腺素受体及腺苷酸环化酶活性的影响

本研究采用放射性配体结合分析法和腺苷酸环化酶(AC)活性测定,观察了冬凌草甲素(Oridonin)对大鼠外周血淋巴细胞β受体的结合作用和北京鸭虹细胞膜中AC活性的影响。结果表明,Oridonin和普萘洛尔(Propranolol)一样能与标记配基竞争与β受体结合,其IC_(50)分别为6.7×10~(-5)mol/L,6.0×10~(-8)mol/L。KI值分别为1.9×10~(-5)mol/L,1.7×10~(-8)mol/L。阻断肾上腺素对膜制剂中AC活性的激动作用,从而证明Oridonin是一种较弱的β受体拮抗剂。     

人血清蛋白与两种天然抗癌有效成分的相互作用

本文应用平衡透析法在pH7.4,振动频率为140～160次/min,25℃恒温条件下,研究了喜树碱和秋水仙碱两种天然抗癌有效成分与人血清蛋白的相互作用.实验结果表明,喜树碱和秋水仙碱均能透过Viskisg纤维素膜.秋水仙碱与人血清蛋白二者的浓度均为1×10~(-5)～5×10~(-5)mol/L时,其结合率几乎为零,而喜树碱与人血清蛋白则有较强的结合力;当喜树碱的浓度为1×10~(-5)～2×10~(-5)mol/L,人血清蛋白浓度条5×10~(-6)～1×10~(-4)mol/L时,结合常数为9.58×10~4mol~(-1),并且喜树碱在人血清蛋白分子上有唯一的结合部位,经荧光光法测知,该结合部位在人血清蛋白分子的U部位.     

人的正常卵巢及卵巢癌绒毛膜促性腺激素受体的研究

活检正常卵巢标本23例和卵巢癌标本16例(粘液性和浆液性囊腺癌各8例),分离细胞膜作绒毛膜促性腺激素受体结合反应。结果表明:正常卵巢、粘液性及浆液性卵巢癌之平均最大结合率分别为13.30±2.24％、20.15±5.14％及9.06±6.40％;受体量分别为0.66±0.14×10~(-10)mol/μg膜蛋白、1.97±1.24×10~(-10)mol/μg膜蛋白及0.48±0.10×10~(-10)mol/μg膜蛋白,Kd值分别为10.10±5.50×10~(-9)mol、25.00±0.29×10~(-9)mol及16.90±0.14×10~(-9)mol。     

环维黄杨星D对心肌钙离子通道的作用

目的　研究环维黄杨星 D(CVB D)对心肌钙离子通道的作用 ,探讨其抗心律失常的电生理机制。方法　取豚鼠室间隔标本 ,37℃恒温 ,通混合氧 ,稳定 4 5min ,再以KCl 3mol/L灌充的微电极记录电刺激产生的动作电位 (AP) ,标本分为 3组 :(1)CVB D组 :每 5min依次累积加入浓度为 3× 10 -8,1× 10 -7,3× 10 -7,1×10 -6,3× 10 -6,1× 10 -5mol/L的CVB D ,分别记录AP ;(2 )CVB D +维拉帕米 (Ver)组 :加入维拉帕米 0 .1μmol/L ,10min时记录AP ,然后每 5min依次累积加入浓度为 3× 10 -8,1× 10 -7,3× 10 -7,1× 10 -6,3× 10 -6,1× 10 -5mol/L的CVB D ,分别记录AP ;(3)Ver组 :加入维拉帕米 0 .1μmol/L ,分别纪录 (2 )中相应时间点的AP。统计给药前后AP幅度 (APA)和时程 (APD)的变化。结果　CVB D对APA影响不大 ,但能显著延长APD ,延长幅度随着剂量的加大而增大 ;但在有维拉帕米存在的情况下 ,CVB D却能使APA和APD缩减 ,尤其是较高浓度1× 10 -6,3× 10 -6,1× 10 -5mol/L时 ,缩减幅度较为明显 ;而单纯加入维拉帕米后 ,APA和APD的改变轻微。结论　CVB D能影响细胞膜上的钙离子通道 ,促进细胞外钙离子内流 ,从而延长APD。当膜钙离子通道被阻断后 ,CVB D却缩短APD。因此可以认为CVB D除影响膜钙离子通道外 ,还     

气隙式气敏电极的制备及性能

一种基于酸碱平衡的气隙式气敏电极,用标准玻璃磨口件及平头pH电极改制,性能优良,制作简便。用作氨电极时(以0.02mol/L NH_4Cl为中介液),测得NH_4Cl浓度在1×10~(-4)～1×10~(-1)mol/L,电极线性良好,30℃时斜率为56mV/PX;当用作二氧化碳电极时(以0.02mol/L NaHCO_3为中介液),测得NaHCO_3浓度在5×10~(-3)～5×10~(-2)mol/L,电极线性良好,级差为1.04pH。     

家兔心肌M型乙酰胆碱能受体的测定

应用特异性标记配体〔~3H〕QNB 测定家兔心肌蕈碱型(Muscarine M)乙酰胆碱能受体。固定〔~3H〕QNB 浓度,特异性结合值随心肌膜制剂浓度(0.25～3.7mg/ml)而呈线性增加。由Scatchard 作图可得平衡解离常数Kd 为0.57±0.07nM(n=14),正常家兔心肌M 受体的最大结合值Bmax 为305±20fmol/mg 蛋白。在37℃时作动力学测定,得结合常数k_1 为0.03M~(-1)min~(-1)解离常数k_2为0.0158min~(-1)。由动力学计算所得Kd(0.53nM)与饱和曲线所得值一致。胆碱类药物东茛菪碱、阿托品、乙酰胆碱、氨甲酰胆碱、匹鲁卡品等抑制特异结合的IC_(50)分别为0.01、0.019、2.5、10、40μM。     

山莨菪碱对乙酰胆碱和去甲肾上腺素引起的兔虹膜释放前列腺素的影响

本文报告了654-2对Ach及NE引起的兔虹膜释放PGE_2及6-Keto-PGF_1α作用的影响。Ach及NE使虹膜释放PG_s增加,654-2对Ach释放PG_s的作用呈剂量依赖性抑制,当654-2浓度为3×10~(-5)mcl/L时,Ach(5×10~(-5)mol/L)引起的PGE_2及6-Keto-PGF_1α的释放量分别降低31％和30％。654-2浓度高于6×10~(-5)mol/L时显著抑制NE(5×10~(-5)mol/L)释放虹膜PG_5的作用,当654-2浓度为3×10~(-4)mol/L时,使NE增     

人胎盘微绒毛膜的制备及其转铁蛋白受体研究

作者分别用差速离心法及蔗糖梯度离心法制备胎盘微绒毛膜(PMM),用受体放射分析法研究了PMM的转铁蛋白受体(TfB),结果表明:两种方法制备的PMM均可用于受体分析,但差速离心法更为简便。测定60例产妇PMM的TfR,其数目为3.53±1.98×10~(12)个位点/mg膜蛋白,最大结合容量为6.33±4.21×10~(-12)mol/mg膜蛋白,Kd值为4.95±3.39×10~(-9)mol/L。受体结合反应体系最适实验条件为,膜蛋白浓度每管50μg,标记物浓度每管50 000cpm,孵育30分钟,B/F分离的聚乙二醇浓度为12％(W/V)。对TfR的特性研究表明:TfR与转铁蛋白的结合具有高度亲和力、高度特异性及可饱和性。     

涂碳聚氯乙烯膜乌头硷选择性电极的研究

作者以乌头碱-四苯硼酸离子缔合物为电活性物制成了涂碳聚氯乙烯膜电极。该电极线性范围为1.0×10~(-2)～5.0×10~(-5)mol/L,检测下限为6.3×10~(-6)mol/L,斜率为57.6mV。作者提出了用此电极控制参附注射液中乌头碱限量的根据和方法。     

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.