心力衰竭患儿血清脂质过氧化物含量的变化

测定20例心力衰竭患儿血清脂质过氧化物(LPO)含量,结果显示,心衰患儿血清LPO含量(4.64±2.19μmol/L)显著高于正常组(2.77±0.56μmol/L)及心脏病无心衰组(2.84±0.88μmol/L),Ⅲ°心衰组(5.80±2.89μmol/L)高于Ⅱ°心衰组(3.54±0.66μmol/L).提示氧自由基引发的脂质过氧化损伤在心力衰竭发生、发展的病理过程中起一定作用.     

急性脑梗塞病人血清LPO含量及全血GSH-PX活性变化的研究

本文观察63例动脉硬化性脑梗塞急性期患者血清脂质过氧化物(LPO)含量(4.20±0.95mmol/L)与全血谷胱甘肽过氧化物酶(GSH-PX)活性(117.13±23.76nmol/L),与对照组比较差异显著(P<0.01)。其中22例病人动态观察的结果表明,病后1～2天患者血清 LPO 升高,GSH-PX 降低(P<0.05,P<0.01),病后30天,二者恢复正常水平。     

牛磺酸对Ca~(2+)引起的脂质体聚集的影响

在人工生物膜—脂质体上观察了牛磺酸对Ca~(2+)引起的脂质体聚集的影响。结果表明,牛磺酸对Ca~(2+)引起的脂质体聚集的影响呈双向性,即低Ca~(2+)浓度(5μmol/L)时促进,而高Ca~(2+)浓度(5mmol/L)时抑制脂质体聚集。牛磺酸的上述作用受脂质体内Na~+和K~+浓度的影响。实验结果提示,牛磺酸具有缓冲Ca~(2+)效应的作用,这可能是牛磺酸能有效调节细胞钙稳态的机理之一。     

sE-SLT与LPO的测定在老年肺炎中的应用

为探讨可溶性E-选择素(sE-SLT)、过氧化脂质(LPO)在老年肺炎中的作用和临床意义,采用定量酶联免疫吸附实验双抗体夹心法和八国木夫硫代巴比妥酸比色法测定60例老年肺炎患者和30例正常人血浆sE-SLT及血清LPO含量,肺炎患者根据PORT评分系统分为Ⅲ、Ⅳ、Ⅴ3组,结果显示老年肺炎患者sE-SLT、LPOⅢ组为44.73±4.83μg/L、4.49±0.21nmol/mL;Ⅳ组为55.31±5.21μg/L、4.86±0.11nmol/mL;V组为83.83±9.45μg/L、4.88±0.38nmol/mL;明显高于正常对照组(P<0.001),3组间比较sE-SLTⅢ组与Ⅳ组之间有差异(P<0.05),LPOⅢ组与Ⅳ组之间差异显著(P<0.01),V组与Ⅲ组、Ⅳ组肺炎患者比较sE-SLT、LPO有非常显著差异(P<0.001)。本试验组PORT评分>130者sE-SLT在83.83±9.45μg/L范围,提示sE-SLT>74.38μg/L可作为重症肺炎的指标之一。结果提示老年肺炎血浆sE-SLT、血清LPO的变化是反映感染性疾病的良好指标,且与病情严重程度存在明显相关性,其含量变化对于观察老年肺炎病情进展、严重程度、治疗效果及预后具有临床意义。     

再灌液中Ca~(2+)浓度的变化对心肌缺血再灌注损伤的影响

在大鼠Langendorff灌流模型上观察灌流液含不同浓度Ca~(2+)对心肌缺血再灌注损伤的影响。结果表明:随再灌液中Ca~(2+)浓度的增加(分别为0、1.5、3.0、5.0mmol/L),以心肌组织谷胱甘肽过氧化物酶活力下降、脂质过氧化物(MDA)含量、Ca含量及乳酸脱氢酶(LDH)漏出量增加为指标的组织损伤进行性加重。     

Ca~(2+)对大鼠离体肝细胞和脂质体脂质过氧化的影响

Ca~(2+)对Fe~(2+)—抗坏血酸引起的大鼠离体肝细胞膜脂质过氧化(LPO)呈现低浓度促进,高浓度抑制的双相效应,而对H_2O_2引起的LPO呈现剂量依赖的抑制作用。Ca~(2+)对Fe~(2+)—抗坏血酸引起的中性和带负电脂质体(PC和PC/DCP)的LPO也呈现促进一抑制的双相反应,而对带正电脂质体(PC/SA)仅呈现剂量依赖的抑制作用。实验结果表明,Ca~(2+)对膜LPO的形成具有显著影响,其效应与Ca_1~(2+)浓度、膜磷脂组成和自由基发生系统的种类有关。     

血液透析对肾功能衰竭患者抗氧化酶活性及过氧化脂质含量影响和分析

本文报道50例肾功能衰竭患者,在应用体外血液透析治疗前后分别观察血浆中过氧化脂质(LPO)及血浆中超氧化物歧化酶(SOD)的活力、红细胞中LPO、SOD值、过氧化氢酶(CAT)活力及全血中谷胱甘肽过氧化物酶(GSH--PX)活性变化情况。结果表明:透析前与透析后相比,血浆中LPO由5.23±2.53nmol/ml降至4.80±1.26nmol/ml(P<0.01),SOD由109.60±15.80NU/ml升至120.30±14.30NU/ml(P<0.01);红细胞中LPO由7.38±3.70nmol/ml降至6.08±1.40nmol/ml(P<0.05),SOD881.30±186.60NU/gHb升至1035±218.50NU/gHb(P<0.01),CTA由15.60±2.60U/mgHb升至17.20±2.10U/mgHb(P<0.01);全血GSH—PX由162.50±25.80NU/ml升至209.40±41.90NU/ml(P<0.01)。肾功能衰竭患者经体外血液透析后使人体的抗氧化能力增强,达到保护细胞功能作用。     

肺炎患儿血清SOD和LPO水平的变化及其临床意义

探讨自由基在肺炎发病中的作用。测定肺炎患儿血清中超氧化物歧化酶 (SOD)及脂质过氧化物 (LPO)含量。肺炎患儿血清水平明显升高 ,SOD、SOD/LPO值显著降低 ,各值与对照组比较均有显著性差异 ,P <0 0 1,恢复期各值与对照组比较 ,差异不具显著性 ,P >0 0 5 )。肺炎急性期时机体氧化反应亢进 ,抗氧化能力低下 ,自由基参与并加重了肺炎的病理过程 ,恢复期自由基对机体的损伤作用已恢复。     

阿霉素对大鼠离体工作心脏毒性研究

阿霉素(100μM)可使离件心脏功能降低,心肌脂质过氧化物(MDA)含量明显增高,但钙含量未见增加,提示阿霉素早期心肌损伤的机制可能首先与自由基有关而不是胞外Ca~(2+)大量内流引起的Ca~(2+)超负荷。本实验还显示心肌细胞膜无明显破坏,推测阿霉素的早期作用部位主要在细胞内。给药后心肌收缩力迅速地、一过性地增高,与作者等以前观察到的阿霉素引起肌浆网Ca~(2+)释放特点相似。本文讨论了肌浆网Ca~(2+)释放与阿霉素心肌病的关系。     

心肺疾患中甲状腺素变化的临床意义

对114例心肺疾患者血清T_3T_4TSH浓度测定结果表明,肺炎合并心衰总T_3(TT_3)0.85±0.14nmol/L、总T_4(TT_4)6.88±2.68nmol/L,风心合并心衰总T_3(TT_3)0.9±0.18nmol/L、总T_4(TT_4)7.64±2.48nmol/L明显低于成人对照组TT_31.65±0.56nmol/L,TT_410.63±1.60nmol/L和儿童对照组TT_31.63±0.58nmol/L,TT_410.64±1.58nmol/L,统计学处理有极显著性差异(P<0.01);而血清TSH4.84±1.80mIU/L与成人对照组4.81±0.98mIU/L和儿童对照组4.80±0.96mIU/L无显著性差异(P>0.05)。     

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.