人皮肤角质形成细胞的分离与原代无血清培养

目的：建立一种体外人皮肤角质形成细胞分离与原代培养的方法。方法：采用两步消化法对皮肤进行消化，获取角质形成细胞进行体外无血清培养基培养，进行细胞形态学观察、免疫组织化学、透射电镜鉴定及生长曲线的绘制与分析。结果：该方法可获取较多高纯度的角质形成细胞，且在体外可快速稳定增殖。结论：两步消化法和体外无血清培养是一种理想的皮肤角质形成细胞分离培养的方法。     

人皮肤角质形成细胞的分离与原代无血清培养

目的 :建立一种体外人皮肤角质形成细胞分离与原代培养的方法。方法 :采用两步消化法对皮肤进行消化 ,获取角质形成细胞进行体外无血清培养基培养 ,进行细胞形态学观察、免疫组织化学、透射电镜鉴定及生长曲线的绘制与分析。结果 :该方法可获取较多高纯度的角质形成细胞 ,且在体外可快速稳定增殖。结论 :两步消化法和体外无血清培养是一种理想的皮肤角质形成细胞分离培养的方法     

人角质形成细胞体外分离与无血清培养的实验研究

目的探讨一种体外人皮肤角质形成细胞分离与原代培养的方法,为角质细胞的多方面研究提供细胞来源。方法采取两步消化法对皮肤进行消化以获取角质形成细胞,采用无血清培养技术进行角质细胞的体外培养,进行细胞形态学观察以及生长曲线的绘制与分析。结果分离酶和胰蛋白酶联合两步消化法能够很好地分离表皮与真皮,活细胞率高,培养后细胞融合时间短,同时又能够避免成纤维细胞的污染,可获取较多高纯度的角质形成细胞。角质细胞无血清培养可以在体外快速稳定增殖,并在多次传代后保持了正常形态。结论两步消化法和体外无血清培养是一种理想的皮肤角质形成细胞分离培养的方法。     

人皮肤角质形成细胞无血清原代培养方法的建立

目的 建立人皮肤角质形成细胞体外无血清、无牛垂体提取物及无饲养细胞的原代培养方法.方法 应用胰蛋白酶.EDTA冷温两步消化法消化健康青年包皮皮肤,获取角质形成细胞并置于无血清、无牛垂体提取物、成分确定的角质形成细胞培养基中进行原代培养并传代.通过观察细胞形态和采用免疫组织化学方法鉴定及绘制生长曲线,分析、评价细胞质量.结果 该方法可稳定获得高纯度、活性好的角质形成细胞.原代角质形成细胞可稳定增殖2周左右,至少可稳定传代增殖5代.经免疫组织化学方法鉴定,99%以上为角质形成细胞.结论 冷温两步消化法及体外无血清原代培养技术可为科研工作提供足量高质量的角质形成细胞,是高效经济的获得人角质形成细胞的方法.     

人皮肤角质形成细胞的制备及体外培养

目的 探讨人皮肤角质形成细胞制备及体外培养的方法.方法 皮肤标本用胰酶、胰酶＋分离酶（dispase酶）2种方法消化,并分别以DMEM培养基、RPMI 1640培养基、限制性角质形成细胞无血清培养基（KC-FSM培养基）培养,MTT法通过比色分析测定培养48 h、72 h后细胞的光密度值（D值）,以判断不同培养基对角质形成细胞增殖的影响.结果 胰酶＋分离酶消化可获得较纯的原代角质形成细胞,细胞在限制性KC-FSM培养基中生长良好,培养48 h、72 h后测得的D值显著高于DMEM培养基和RPMI 1640培养基（P＜0.05）.结论 胰酶＋分离酶消化、限制性KC-FSM培养基体外培养是制备和培养人皮肤角质形成细胞的好方法.     

人皮肤角质形成细胞和成纤维细胞的原代培养和鉴定的实验研究

目的建立人皮肤角质形成细胞(keratinocyte)成纤维细胞(fibmblast)原代培养和体外连续培养的模型，为组织工程化皮肤提供充足的种子细胞。方法以5-15岁小儿包皮为材料，胰蛋白酶消化后，分离两种细胞，分别用无血清表皮培养液(K-SFM)、DMEM(10％血清)培养，对年轻细胞(2-4代角质形成细胞，10-40代成纤维细胞)均用倒置显微镜进行大体观察，透射电镜进行超微结构观察，并拍照记录，同时进行免疫细胞化学鉴定。结果消化后得到大量细胞，在培养2周后开始传代，光镜下角质形成细胞呈典型铺路石状，透射电镜下呈多边形，符合角质形成细胞特征；成纤维细胞光镜下呈梭形，放射状或漩涡状排列，电镜证实是成纤维细胞。免疫细胞化学检测：角质形成细胞鼠抗人角蛋白(AE1／AE3)单克隆抗体(mouse anti-cytokeratin)染色阳性；成纤维细胞鼠抗人Ⅰ型，Ⅲ型胶原单克隆抗体(mouse anti-TypeⅠ，ⅢCollagen)和鼠抗人波形蛋白单克隆抗体(mouse anti-vim-entin)染色阳性。结论用简便易行，经济实用的方法在体外对角质形成细胞和成纤维细胞进行分离、培养和传代，能同时得到足够数量的组织工程皮肤的种子细胞。     

人表皮干细胞的体外分离培养和鉴定

目的:探讨人表皮干细胞的体外快速分离培养及鉴定方法.方法:中性蛋白酶和胰蛋白酶两步法从手术切除的人包皮组织中分离表皮层和真皮层,并获得表皮单细胞悬液,采用Ⅳ型胶原铺板选择性黏附、分离和角质细胞无血清培养基(K-SFM)培养表皮干细胞.倒置显微镜下观察培养细胞的生长状况,检测细胞克隆形成率,免疫组化染色观察表皮干细胞标志物β1整合素和角蛋白19(K19)的表达;以角质形成细胞作为对照.结果:组织学观察显示,培养24h后细胞呈克隆状生长;所分离、培养细胞的克隆形成率高于对照角质形成细胞;免疫组化染色显示,培养细胞β1整合素及K19均呈阳性表达.结论:运用Ⅳ型胶原黏附结合K-SFM培养可以实现人表皮干细胞的体外快速分离和培养.     

人角质形成细胞库的建立

目的探索人皮肤表皮细胞分离、培养、传代、冻存及复苏技术.方法采用细胞培养技术及免疫组化染色鉴定技术.结果采用细胞培养技术体外分离培养了小儿包皮表皮细胞,培养的表皮角质形成细胞,经冻存、复苏后,此角质形成细胞仍既能增殖,又能分化,生长状态与新鲜分离的角质形成细胞相类似.结论酶消化法是快速大量培养表皮细胞的简便易行的方法.     

大鼠表皮基底层干细胞体外分离与培养

目的建立简单、可靠的大鼠表皮基底层干细胞体外分离培养方法。方法取新生大鼠背部皮肤,采用胰酶两步消化法获得单细胞悬液,Ⅳ型胶原差速贴壁法富集干细胞,将慢黏附细胞作为对照组细胞,均以角质形成细胞无血清培养基培养。以β1-整合素和角蛋白19(K19)双重荧光染色鉴定细胞表型,克隆形成实验检测细胞体外增殖能力。结果分离培养的细胞为多角形、呈铺路石样排列,倍增时间约为24h,细胞形态和生长规律符合基底层干细胞的特征。免疫荧光鉴定显示细胞共表达β1-整合素和K19,基底层干细胞克隆形成能力显著强于对照细胞。结论两步消化联合Ⅳ型胶原差速贴壁法获取基底层干细胞简易可行,培养的细胞活力好、表型可靠。     

成年大鼠骨骼肌卫星细胞原代培养及鉴定

目的：探讨骨骼肌卫星细胞体外培养，鉴定的方法。方法：采用I型胶原酶和胰蛋白酶两步消化法分离大鼠骨骼肌卫星细胞，经差速贴壁法纯化后，在培养液中进行培养，观察不同血清浓度下，卫星细胞生长融合的情况，倒置显微镜观察细胞形态，利用结蛋白免疫细胞化学染色方法鉴定肌卫星细胞。结果：细胞经过两步消化和差速贴壁后，纯度在90%以上，在生长培基中，细胞分裂增生；在融合培基中，细胞发生融合，形成肌管。结论：成年大鼠肌卫星细胞在不同的培养条件下可增生或分化，结蛋白免疫细胞化学染色可以早期鉴定骨骼肌卫星细胞。     

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.