接触氯苯工人的姐妹染色单体交换和染色体畸变的观察

本文检查了接触氯苯工人淋巴细胞的染色体畸变和姐妹染色单体交换(SCE)的频度。结果表明,接触氯苯工人的外周血淋巴细胞染色体的细胞畸变率为24.27％SCE/细胞为6.23±0.10,均显著高于对照组(P<0.01)。因此可以说,氯苯可能具有潜在的致突变作用,而且对氯苯来说,染色体畸变率是比SCE交换率更敏感的指标。     

棉酚对人体外周血淋巴细胞染色体畸变和姊妹染色单体交换频率影响的研究

本文对棉酚影响短期培养的人外周血淋巴细胞染色体数目、畸变和姊妹染色单体交换频率(SCE)的效应进行了分析。初步结果如下:①服药组与对照组的中期染色体结构畸变出现率,未见明显差异。②高浓度棉酚(9微克)组计数112个中期细胞中有10个多倍体(占9％),与对照组多倍体出现率(12/351)比较,有统计学差异。③在棉酚对SCE的效应     

二甲苯对正常人外周血淋巴细胞SCE频率的影响

目的探讨二甲苯对正常人外周血淋巴细胞DNA的损伤作用。方法采用染色体分析技术,对体外培养的外周血淋巴细胞姊妹染色单体交换(SCE)频率进行观察。结果3.0、6.0 mmol/L二甲苯组淋巴细胞中的SCE计数平均值分别为7.533±0.234、10.933±0.325,与对照组(2.800±0.242)比较,差异具有极显著性(t=14.084、20.085,P<0.001)。结论二甲苯对正常人外周血淋巴细胞DNA有显著损伤作用。     

接触三硝基甲苯工人的染色体畸变和姐妹染色单体互换的初步观察

本文检查了接触三硝基甲苯的工人外周血淋巴细胞染色体畸变和姐妹染色单体互换(SCE)的频度。结果表明:1.接触三硝基甲苯的工人染色体畸变率明显高于对照织(p相似文献   

鼻咽癌患者外周血淋巴细胞染色体畸变的研究

目的　探讨鼻咽癌患者淋巴细胞染色体畸变情况。方法　用 TC199培养基 ,对 2 8例鼻咽癌患者和2 0例正常人进行外周血淋巴细胞染色体畸变的检测。结果　鼻咽癌患者外周血淋巴细胞染色体数目、结构、畸变细胞率和微核率分别为 8.68%、10 .89%、8.65 %和 1.83 % ,均较正常人组有显著性差异 ( P<0 .0 1或 P<0 .0 5 ) ,畸变率明显高于正常人。结论　鼻咽癌患者的外周血淋巴细胞染色体存在不稳定性     

东莨菪碱诱发染色体畸变的剂量效应

东茛菪碱五个剂量(1、2、5、10、20μg/ml作用于12名健康成人外周血淋巴细胞培养液诱发染色体畸变,并设空白对照组(生理盐水)。染色体畸变率分别为3.±0.5,9.6±1.1,11.7±1.1,13.6±2.3,18.0±3.0和17.5±2.0％;细胞畸变率为3.1±0.6,9.2±0.6,10.0±0.8,10.8±1.5,11.6±1.8和12.2±14.％。各剂量组与对照组比较差异高度显著(P<0.01)。方差分析,各剂量组间变异的差异高度显著(P<0.01)。相关系数和回归系数也非常显著(P<0.01)。结果表明,东莨菪碱剂量与染色体畸变率和细胞畸变率有线性关系。     

北京地区长寿老人细胞遗传学研究

本文报告30例95岁以上老人(长寿组)和30例中年人(对照组)细胞遗传学的比较研究结果。染色单体畸变率、姐妹染色单体互换(SCE)频率和亚二倍体细胞百分率长寿组均明显高于对照组(分别为2.30VS1.56/每100细胞、5.3±1.5/细胞VS4.1±0.6/细胞和8.88％VS6.78％,(P<0.05),故均可作为衰老指标。而有丝分裂指数(6.85％VS6.56％,P>0.05)两组无显著差别,说明长寿老人的细胞还能保持相当的分裂能力。加松胞素B(CB)后双核细胞微核率两组差异不显著(15.2‰VS13.9‰,P>0.05),其意义尚需进一步研究。     

牛磺酸对丝裂霉素C诱发人淋巴细胞遗传损伤的保护作用

目的研究牛磺酸的抗诱变作用.方法人体外周血淋巴细胞分别加入0.5～20.0mmol/L牛磺酸及0.05mg/L丝裂霉素C(MMC),(37±1)℃体外培养72h,观察淋巴细胞姊妹染色单体互换(SCE)频率和染色体畸变(CA)发生率.结果0.5～5.0mmol/L牛磺酸加0.05mg/LMMC组淋巴细胞SCE及CA发生率与阳性对照组(MMC0.05mg/L)相近(P＞0.05);而当牛磺酸浓度≥10.0mmol/L时,淋巴细胞SCE及CA频率明显降低(P＜0.05),并呈现浓度依赖趋势.结论较高浓度(10mmol/L及以上)牛磺酸可以对化学诱变剂所致DNA和染色体的遗传损伤具有一定保护作用.牛磺酸很可能是一种有前景的化学诱变保护剂.     

对铬作业工人银染核仁形成区、姊妹染色单体互换及微核的研究

作者对31名从事铬酸盐生产的工人及31名健康人的外周血淋巴细胞银染核仁形成区(Ag-NOR)、姊妹染色单体互换(SCE)及微核率进行了研究。结果:连续工龄在8年以上者,Ag-NOR、银染近端着丝粒染色体的联合频率(Ag-AA)及SCE与对照组间有高度显著性差异(P<0.01);微核率,各工龄组与对照组间均有高度显著性差异(P<0.001)。表明长期接触铬酸盐工作者,其遗传物质可能遭受到一定程度的损伤。     

胃癌外周血淋巴细胞姐妹染色单体互换检测的临床意义

目的探讨胃癌患者外周血淋巴细胞姐妹染色单体互换(SCE)检测的临床意义.方法通过差异染色观察105例胃癌患者与31例健康对照者的SCE数/细胞(SCE值)变化.结果胃癌患者与健康对照者SCE值分别为11.44±1.28与6.36±0.41,差异有非常显著性意义(P＜0.01);进展期胃癌、伴淋巴结和肝转移者SCE值分别为13.37±2.13、13.65±1.19和12.76±1.97,早期胃癌、不伴淋巴结和肝转移者SCE值则分别为9.55±1.08、8.15±1.98及8.64±0.73,差异有显著性意义(P＜0.05);高中分化胃癌与低分化胃癌SCE值(10.48±1.97与11.28±2.27)差异无显著性意义(P＞0.05).结论提示SCE差异染色可能可作为诊断胃癌及估计胃癌预后的一项指标.     

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.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

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.     

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.