5％硝酸、10％EDTA用于大鼠尾椎椎间盘组织脱钙处理的效果观察

目的 观察并比较大鼠尾椎椎间盘经5％硝酸或10％EDTA脱钙处理后的病理表现.方法 成年SD雄性大鼠10只,取鼠尾Co6/7-Co9/10椎间盘,Co6/7和Co8/9为硝酸组进行5％硝酸脱钙处理,Co7/8和Co9/10为EDTA组进行10％EDTA脱钙处理.记录脱钙时间,采用HE染色、番红O固绿染色进行组织形态学观察,采用免疫组化染色观察II型胶原蛋白表达.结果 硝酸组脱钙需(18.35±4.71)h,EDTA组需(22.75±6.64)h.硝酸组整体形态保持更好,但是免疫组化染色II型胶原蛋白表达明显减少.EDTA组组织形态保持尚可,纤维环组织变硬变脆,有组织松散紊乱表现,但是II型胶原蛋白表达明显.结论 大鼠尾椎椎间盘经5％硝酸、10％EDTA两种脱钙液处理后,在进行普通病理及结构观察时,5％硝酸具有脱钙时间短,组织形态更完整的优势,但需要进行免疫组化染色时,10％EDTA进行脱钙处理更有优势.可以根据不同的科研需求选择脱钙方法.     

防腐剂山梨酸钾对蚕豆根尖细胞的遗传毒性

目的研究防腐剂山梨酸钾对蚕豆根尖细胞微核和染色体畸变的影响及β胡萝卜素、维生素B2和维生素C对山梨酸钾遗传毒性的抑制作用。方法采用福尔根压片法。结果山梨酸钾可明显引起微核率的上升,与对照组差异显著(P<005)或极显著(P<001),不引起染色体畸变率的明显上升。3种物质均可降低山梨酸钾诱发的微核率和染色体畸变率。结论防腐剂山梨酸钾对蚕豆细胞具有一定的遗传毒性,β胡萝卜素、维生素B2、维生素C对山梨酸钾的毒性具有拮抗作用。     

煅玄精石质量标准研究

目的：探讨煅玄精石的质量标准，主要研究乙二胺四醋酸(EDTA)配位滴定法用于煅玄精石质量控制的可行性。方法：用EDTA测定煅玄精石中含硫酸钙(CaSO4)的含量。结果：本法对煅玄精石的含量测定，重现性好，平均回收率为97．60％，RSD=1．91％(n=5)。结论：该法简便、快速、准确度高。     

EDTA抗原修复缓冲液在ER、PR免疫组化染色中的应用

目的 选择能显示最佳的ER、PR染色效果的抗原修复液。方法 分别采用柠檬酸和EDTA两种抗原修复液对50例乳腺癌切片进行微波抗原修复，比较二者对ER、PR免疫组化检测效果的影响。结果 经EDTA修复后，乳腺癌ER、PR染色 ／ 者分别为44．0％(22／50)、64．0%(32／50)，显著高于经柠檬酸修复的染色效果24．0％(12／50)、24．0％(12／50)，且前者背景清晰。结论 乳腺癌ER、PR免疫组化染色采用EDTA进行微波抗原修复后，染色阳性强度明显优于经柠檬酸修复者，值得推广应用。     

山梨酸钾的毒理学评价

目的研究山梨酸钾的毒性,评价其安全性。方法按照GB15193.1-21《食品安全性毒理学评价程序》的方法对山梨酸钾的毒性级别、遗传毒性等进行安全性评价。结果山梨酸钾对小鼠急性毒性实验LD50=1300mg/kg,属低毒级;通过骨髓细胞微核试验、小鼠精子畸形试验、传统致畸试验,发现山梨酸钾无遗传毒性;30d喂养试验对动物体重、血液常规及血清ALT、BUN、GLU、TC、TG均未有明显毒性作用(P>0.05)。结论山梨酸钾是一种安全、相对无毒的食品添加剂,可用于各类食品及饮料中。     

EDTA对牙本质内层龋表面处理效果的临床研究

本文以含3％三氯化铁的10％枸椽酸(10—3液)作为对照,观察10％EDTA对牙本质内层龋表面玷污层的清除效果的临床疗效,以期寻找一种安全可靠的牙本质内层龋表面处理剂,为龋病保存治疗寻找一个新途径。本研究证明:除近髓处点状垫底外,10％EDTA处理牙本质内层龋后,用磷酸脂类粘结剂/CC—3型后牙复合树脂充填,近期临床观察,对牙髓无明显的损害。     

多聚赖氨酸与 EDTA 交联物对小鼠成纤维细胞的毒性研究

目的：观察多聚赖氨酸与乙二胺四乙酸（EDTA）的交联物（PLE）对体外培养的小鼠成纤维细胞L929的毒性程度。方法：小鼠成纤维细胞 L929分为正常组、对照组、多聚赖氨酸组、PLE 组和 EDTA 组,采用MTT 法比较相同浓度下,EDTA、多聚赖氨酸与 EDTA 交联物对小鼠成纤维细胞 L929相对增殖率的影响。结果：以正常组作为标准（100％）,多聚赖氨酸组、EDTA 组、PLE 组和对照组对小鼠成纤维细胞 L929的相对增殖度（RGR）分别为79．87％、69．35％、81．47％和20．12％,均较正常组下降,差异有统计学意义（P ＜0．05）;在质量浓度达为1000μmoL／L 时,EDTA 对小鼠成纤维细胞 L929的毒性为2级,PLE 和多聚赖氨酸对小鼠成纤维细胞L929的毒性为1级。结论：实验浓度的 PLE 和 EDTA 对小鼠成纤维细胞 L929毒性较低,具有一定的安全性。     

不同抗凝剂和取血方式影响血小板计数准确性的探讨

为了解抗凝剂EDTA K2 、EDTA K3和不同取血方式对静脉血中血小板计数的影响。取 80名健康大学生 (年龄 2 0～ 2 3岁 ,男性 )静脉血 4ml分别加入EDTA K2 和EDTA K3抗凝试管中各 2ml,经检测结果发现二者无显著性差异 (P >0 .0 5 ) ;另外用注射器取 4ml静脉血 :一种方式带针头加入EDTA K3抗凝试管 2ml,另一种方式拔掉针头加入EDTA K3抗凝试管中 2ml,经检测结果发现二者有显著性差异 (P <0 .0 5 )。认为血小板计数时采用EDTA K2 或EDTA K3抗凝均可 ,但注射器针头应拔掉才能把血加入抗凝试管中     

心肌肌钙蛋白T与终末期肾病

0 引言 终末期肾病(ESRD)患者中,心血管并发症(CVD)严重影响患者生存率。据EDTA报道52.6％的透析患者死于CVD,透析患者由CVD导致的死亡率是普通人群的10～20倍,其中因冠状动脉病变所导致的死亡率为19％～39％。冠状动脉病变的共同因素为急性粥样斑块破裂、血小板激活、血栓形成导致血管腔不同程度的阻塞,临床上出现不稳定性心绞痛,急性心肌梗死(AMI)和缺血性心性猝死,称为急性冠状动脉综合征(ACS)。在发     

依地酸钙钠、丹参注射液联合小剂量强的松治疗系统性硬化症的临床研究

目的 观察依地酸钙钠(EDTA)、丹参注射液、小剂量强的松治疗系统性硬化症(SSc)的疗效及安全性.方法 对32例SSc患者进行EDTA1.0g静滴,1次/d,连用5d后停用2d,再静滴5d为一疗程,每1个月重复一次,共4次;丹参注射液30 ml静滴,1次/d;强的松0.5 mg/(kg·d),分2次口服,1个月后或症状改善后逐渐减量,10～15 mg/d维持.治疗前后对患者皮肤紧硬改变进行自我评价和改良Rodnan评分,对炎症指标血沉(ESR)、C反应蛋白(CRP)进行比较.结果 除1例因不良反应未完成整个疗程外,其余患者自我评价的总有效率为87.10％.改良Rodnan评分为治疗前(22.48±9.02)分,治疗后(11.26+5.28)分,差异有统计学意义(P＜0.01).ESR、CRP较治疗前明显下降,差异有统计学意义(P＜0.05或P＜0.01).不良反应发生率为6.25％.结论 EDTA、丹参注射液联合小剂量强的松治疗SSc能较快地、显著地改善SSc的皮肤紧硬症状及炎症指标,且不良反应较少.     

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.