-80℃冰箱降温-液氮冻存脐血造血干细胞

为脐血造血干细胞 (CBHSC)的冻存建立简便有效的方法 ,采用 5 %二甲基亚砜 (DMSO)加 6 %羟乙基淀粉 (HES)为冷冻保护剂 ,不用程控降温装置 ,直接置CBHSC于 -80℃冰箱中降温 ,次日移至液氮液中保存 1周、1个月、3个月、6个月。结果冻存 6个月后 ,单个核细胞 (MNC)、粒 -单系造血祖细胞 (CFU -GM )和CD+34 细胞的回收率及MNC的台盼蓝拒染率分别为 90 .5± 1.7% ,87.6± 19.5 % ,91.9± 2 .9% ,75 .8± 1.8%。认为这一简便的方法能很好地保存CBHSC的造血潜能 ,因此它能为脐血移植冻存CBHSC。     

简易法冻存脐血造血干细胞的研究

目的 :为脐血造血干细胞 (CBHSC)的冻存建立简便、经济且有效的方法。方法 :采用 5 %二甲基亚砜 (DMSO)加6 %羟乙基淀粉 (HES)为冷冻保护剂 ,不用程控降温装置 ,直接置 CBHSC于 - 80℃冰箱中降温 ,后分 - 80℃冰箱组和液氮组保存 1周至 3个月。结果 :冻存 3个月后 ,单个核细胞 (MNC)和粒 -单系造血祖细胞 (CFU- GM)的回收率及台盼兰拒染率在 - 80℃冰箱保存组分别为 (92 .9± 0 .8) % ,(82 .2± 19.6 ) % ,(82 .1± 1.4) % ;在液氮保存组分别为 (93.0± 1.2 ) % ,(93.6± 2 2 .2 ) % ,(85 .6± 1.5 ) %。结论 :这两种简便、经济的方法能很好地保存 CBHSC的造血潜能 ,能为脐血移植冻存CBHSC。     

造血干细胞采集、分离与冻存的研究

目的 :研究外周血造血干细胞的采集、分离、冻存及干细胞活性的检测。方法 :用封闭式动脉采血法采集 10例脐血 ,经Ficoll溶液分离获得干细胞 ,分成 3组 ,分别用 10 %二甲亚矾 (DMSO)、自配的 5 % DMSO+6 %羟乙基淀粉 (HES) +4 %人体白蛋白及 CP- 13种不同的冷冻保存液冻存于 196℃的液氮和 80℃的低温冰箱中 ,对冷冻后的样本进行单个核细胞 (MNC)计数。锥虫蓝拒染试验及流式细胞仪 CD+ 34 细胞计数。结果 :采集的血量平均数为 (72 .2± 17.3) ml,3种不同冷冻保存液对造血干细胞的保存效果在 1、3、6个月差异无显著性 (P>0 .0 5 )。随着冷冻时间的延长 ,特别是 6个月后 ,流式细胞仪对 CD+ 34 细胞检测的相对数逐渐增高。在 6个月内 ,80℃低温冰箱中的冻存与 196℃液氮内的冻存相比 ,对造血干细胞的影响差异无显著性 (P>0 .0 5 )。结论 :自配的冷冻保存液效果良好 ,短期造血干细胞的冻存可以在 80℃低温冰箱内进行 ,冷冻保存造血干细胞 1、3、6个月对细胞的活性影响不大。     

﹣80°C冰箱长期冻存外周血造血干细胞研究

目的对外周血造血干细胞活性在深低温（-80℃）下保存3年的效果进行评价。方法对30例经MCS＋血细胞分离机采集所得的外周血造血干细胞加入细胞冻存保护剂分别予以-196℃液氮冻存和-80℃冰箱深低温冻存,并检测和比较冻存前后单个核细胞（mononuclear cells,MNC）、CD34＋细胞的计数及细胞回收率,细胞活性。结果 -80℃冰箱冻存组MNC、CD34＋细胞冻存3年与冻存前比较差异均无统计学意义冻存3年后MNC回收率与冻存1年后比较差异无统计学意义。3年后-80℃冰箱冻存组干细胞与-196℃液氮冻存组比较,差异无统计学意义。结论 -80℃冰箱深低温保存法快速、简便、安全、费用低廉,可有效用于外周血造血干细胞长期保存。     

-80℃条件下不同细胞浓度外周血干细胞冻存效果的实验观察

目的　观察不同细胞浓度外周血干细胞在 - 80℃条件下的冻存效果。方法　采用一种简便的 - 80℃干细胞冻存方法 ,其干细胞保护剂终浓度为 5 %二甲基亚砜 (DMSO) ,3%羟乙基淀粉 (HES)和 4 %人血白蛋白 (HSA) ,不经程序降温 ,直接 -80℃冰箱冻存外周血干细胞 ,并在不同时相点 (冻存后 1、3、6、9、1 2个月 )对推荐细胞浓度组 (1 .3～ 3.9)× 1 0 7/ml、调整细胞浓度组 (8.0～ 2 9.9)× 1 0 7/ml和高细胞浓度组 (30 .1～ 70 .1 )× 1 0 7/ml的外周血干细胞的细胞活性进行检测 ,观察台盼蓝拒染率和MNC、CFU GM、CD34+ 细胞的回收率。结果　 3组干细胞活性在 1 2个月内无明显下降 ;干细胞冻存后 9个月期间 ,3组冻存细胞的台盼蓝拒染率 ,MNC回收率、CFU GM回收率、CD34+ 细胞回收率都在 80 %以上。冻存 1 2个月中 ,3组在冻存后同一时间相互比较无统计学差异 (P >0 .0 5 ) ,说明该 - 80℃干细胞冻存方法适用于不同浓度的细胞液 ,短期内具有良好的冻存效果。结论　5 %DMSO、3%HES和 4 %HAS作为干细胞冷冻保护剂直接 - 80℃冰箱冻存外周血干细胞的方法能有效地保护不同浓度细胞液的外周血干细胞活性 ,适当地提高细胞保存时的浓度 ,减少回输量 ,可避免因干细胞冻存而引起的副作用     

-80℃冰箱非程控降温冻存脐血造血干细胞

目的:为脐血造血干细胞(CBHSC)的冻存建立简便、经济且有效的方法。方法:采用5％二甲基亚砜(DMSO)加6％羟乙基淀粉(HES)为冷冻保护剂,不用程控降温装置,直接置CBHSC于-80℃冰箱中冻存1～6个月。结果:冻存6个月后,单个核细胞(MNC)、粒-单系造血祖细胞(CFU-GM)和CD_(34)~+细胞的回收率及台盼兰拒染率分别为(91.6±1.8)％,(83.1±15.6)％,(88.2±1.8)％,(77.7±2.0)％。结论:这种简便、经济的方法能很好地保存CBHSC的造血潜能,因此,能为脐血移植冻存CBHSC。     

脐血造血干细胞冻存和纯化的研究

为观察脐血造血干细胞—80℃保存以及脐血CD34~ 细胞的纯化效果,采用-80℃深低温冰箱冻存脐血干细胞,结果表明保存1个月脐血单个核细胞(MNC)数量、锥虫蓝拒染率、粒一单祖细胞集落(CFU—GM)数回收率分别为85.17％±5.38％、91.67％±3.22％、60.50％±4.42％。保存1、3、6个月动态观察3项指标除锥虫蓝拒染率1个月与6个月外均无显著性差异{均P>0.05)。用Isolex50免疫磁珠分离系统,可从脐血中获得高纯度CD34~ 细胞。上述研究为脐血造血干细胞移植的临床应用提供了实验依据。     

当归多糖对脐血造血细胞的抗冷冻损伤作用

目的：探讨当归多糖（APS）对脐血造血细胞的抗冷冻损伤作用.方法：采用细胞计数法比较羟乙基淀粉（HES）、明胶、淋巴细胞分离液（Ficoll）分离脐血单个核细胞（MNC）的回收率.应用细胞计数法、台盼蓝拒染法、集落形成实验和流式细胞术,检测冻存1,3,6mo脐血MNC的生物学活性,将脐血MNC与不同浓度APS共培养24h后冻存,1mo后复苏,观察APS对脐血MNC抗冷冻损伤的作用.结果：HES法、明胶法的MNC回收率均大于85%,显著高于Ficoll法（50.00±4.00）%（P〈0.05）;冻存1,3,6mo组MNC,CFU-Mix,CD34＋细胞回收率及台盼蓝拒染率差异均无显著性,且脐血MNC的损伤与冻存时间不相关.APS50,100,200,400mg/L不同浓度APS组MNC,CFU-Mix回收率和台盼蓝拒染率除APS400mg/L组下降外,其余各组明显上升（P〈0.05）;各组组间CD34＋细胞回收率差异无显著性.结论：APS可有效提高脐血造血细胞的抗冷冻损伤能力.     

超低温冻存前后胎儿脐血中NK细胞活性的研究

目的　探讨影响胎儿脐血NK细胞活性的因素。方法　采用台盼蓝染色法检测NK细胞活性 ,脐血MNC用Ficoll分离液离心获得。结果　经液氮 (- 196℃ )冻存后脐血NK活性比冻存前显著提高。结论　提示超低温能解除抑制脐血NK细胞活性的因素     

F68及其联合DMSO对脐血造血细胞的低温保护作用

目的研究普鲁兰尼克(F68)及其联合DMSO在-80℃条件下对脐血造血干细胞的低温保护作用,为临床应用提供依据.方法脐血造血细胞冻存30、60、90 d后复苏,应用台盼蓝拒染率、集落形成试验、3H-TdR掺入率等,测定经F68保护体系冻存的脐血活力,并与目前通用的冷冻保护剂二甲亚砜及CP-1进行了对比研究.结果在-80℃条件下,F68对脐血造血细胞具有明显的冷冻保护作用,并与DMSO具有协同保护效果,联合F68及DMSO的保护体系可使MNC、CFU-GM的平均回收率及台盼蓝拒染率在第90天时分别达到(83.4±6.3)%,(68.8±7.9)%, (92.5±5.1)%,优于目前通用的细胞冻害保护液CP-1及DMSO.90 d的冻存期内,脐血细胞活力无明显下降.结论 F68及其与DMSO组成的冻存方案对脐血造血干细胞具有良好的冻存保护效果.     

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.