人脐静脉内皮细胞的原代培养及鉴定

目的建立一种能大量分离人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs)体外培养模型,并对其进行鉴定,为体外血管内皮细胞及相关疾病的研究搭建桥梁。方法采用0.1%Ⅰ型胶原酶分离脐静脉内皮细胞,于M199培养基(含20%胎牛血清,80%M199不完全培养基,1%终浓度为50μg/mL内皮细胞生长复合物,1%终浓度为100μg/mL肝素钠,1%青-链霉素,1%L-谷氨酰胺)中培养,待细胞80%以上融合后,用0.25%的胰酶和0.25%的EDTA消化传代,并在倒置显微镜下观察细胞形态,用免疫荧光法对细胞进行鉴定。结果原代培养的HUVECs在24 h后完全贴壁,2～3 d可达80%的融合,倒置显微镜下观察细胞呈鹅卵石状排布,免疫荧光显示细胞胞浆中Ⅷ因子相关抗原阳性。结论 0.1%Ⅰ型胶原酶消化HUVECs方法便于操作,细胞获得量多且生长状态良好。     

人脐静脉内皮细胞的体外分离培养及鉴定

目的探讨人脐静脉内皮细胞的原代培养方法,提高体外分离培养血管内皮细胞的成功率。建立血管内皮细胞培养模型,为体外研究血管内皮细胞提供实验基础。方法取2根脐带(至少20 cm)冲净淤血,采用加工穿刺针固定脐静脉灌注消化液,一根用0.2%胶原酶Ⅱ,另一根用0.1%胶原酶Ⅰ和0.25%胰酶等比混合消化液,比较两种酶的消化效果。收集细胞并用含有10 ng/mL的VEGF的培养基中培养,观察细胞的生长及传代。并在倒置显微镜下观察细胞的形态学特点,同时用免疫组织化学的方法对所得细胞进行鉴定。用流式细胞术观察细胞周期。结果两种消化酶方法均获得了相当数量的人脐静脉内皮细胞,胶原酶Ⅱ的消化效果稍优于混合消化酶,且比较理想的消化时间均为13 min,细胞接种后4～5 h开始贴壁生长,1周左右可生长成单层,光镜下呈多角形,"铺路石"样排列,免疫组织化学法可见内皮细胞胞浆中人第Ⅷ因子相关抗原呈阳性反应。细胞周期显示约有50.6%的细胞处于G0/G1期。结论胶原酶Ⅱ和胶原酶Ⅰ与胰酶等比混合消化液灌注法是获得脐静脉内皮细胞的一种可取方法,而胶原酶是分离培养脐静脉内皮细胞的首选消化液,成功率高,可靠性大,可成功构建体外研究血管内皮细胞的模型。     

人脐静脉内皮细胞分离培养及不同消化酶效力比较

目的采用酶消化法进行人脐静脉内皮细胞分离培养,并比较不同消化酶获得细胞数量及细胞存活率的差别。方法分别用0.125%、0.25%胰蛋白酶和0.1%I型胶原酶消化获取脐静脉内皮细胞,比较三种酶液消化的结果,在倒置相差显微镜下观察细胞形态特点,同时用Ⅷ因子免疫荧光法和DiI-acLDL摄取实验对所得细胞进行鉴定。结果0.125%、0.25%胰蛋白酶和0.1%I型胶原酶的最佳消化时间分别为15min、12min、15min,倒置相差显微镜下观察所得细胞呈典型内皮细胞形态,免疫荧光法检测Ⅷ因子相关抗原阳性,且细胞具有DiI-acLDL摄取能力。结论采用酶消化法分离培养脐静脉内皮细胞简便易行,但需严格掌握消化时间以减少细胞损伤,0.1%I型胶原酶是最理想的内皮细胞消化酶。     

改良酶消化法体外培养人脐静脉内皮细胞

目的观察改良酶消化法分离、培养人脐静脉内皮细胞(human umbilial vein endothelial cells,HUVECs)的效果,探讨获取高纯度、高活性HUVECs的培养方法。方法采集健康新生儿脐带,应用改良的酶消化法(含0.016%EDTA的0.25%胰蛋白酶)进行HUVECs的分离培养;通过细胞形态学观察及免疫荧光化学鉴定HUVECs及其特异性抗原的表达。结果体外培养的HUVECs细胞形态呈铺路石样,Ⅷ因子相关抗原荧光染色阳性,细胞纯度可达99%。结论通过本实验改良的分离培养方法,可以在体外获得较高数量的HUVECs,在细胞形态、表面抗原标志等方面具内皮细胞特征,可以用于血管内皮细胞模型的构建。     

改良人原代脐静脉内皮细胞的分离及鉴定

目的:优化人脐静脉内皮细胞(HUVECs)的分离及培养方法。方法:在传统HUVECs分离的基础上进行改进,通过Ⅰ型胶原酶消化分离HUVECs,利用倒置显微镜观察其生长状况、免疫组织化学方法及流式细胞术检测所培养细胞的纯度。结果:改良实验步骤和精简操作后,HUVECs分离不受影响,分离的HUVECs在体外2~4 d可长成单层,倒置显微镜下可见细胞呈"鹅卵石"状排列,Ⅷ因子免疫组化实验阳性,流式细胞术检测细胞纯度达99.37%。结论:用胶原酶消化法分离HUVECs具有培养周期短,所获得的HUVECs纯度较高的优点,有利于体外血管内皮细胞模型的建立。     

人脐静脉内皮细胞的原代培养及鉴定

目的:探讨新生儿脐静脉内皮细胞的培养及鉴定方法,建立血管内皮细胞培养模型,为体外研究血管内皮细胞提供实验手段。方法:采用0.1%Ⅱ型胶原酶分离脐静脉内皮细胞,于M199培养基(含15%胎牛血清,促内皮生长因子1%,青霉素100u/ml,链霉素100mg/ml)内培养,待细胞80%融合后,以0.25%胰蛋白酶和0.02%EDTA消化传代,并以倒置光显微镜观察内皮细胞生长情况,以免疫荧光方法对内皮细胞进行鉴定。结果:原代培养细胞在接种2h后开始贴壁生长,倒置光显微镜下观察细胞呈鹅卵石状排列,免疫荧光显示细胞胞浆内Ⅷ因子相关抗原阳性。结论:用胶原酶灌注消化脐静脉是获得内皮细胞的一种较可靠的方法。     

人卵巢颗粒细胞原代培养方法的比较

目的 对比5种不同方法分离人卵巢颗粒细胞的效果,并选择出高效、稳定的分离纯化、体外培养的有效方法.方法 收集不孕症患者行体外受精-胚胎移植(IVF-ET)穿卵时的卵泡液,采用裂解法、裂解+胰酶法、密度梯度离心法(包括Precoll+胰酶、Precoll+Ⅰ型胶原酶、Precoll+透明质酸酶)分离颗粒细胞后进行活细胞计数,卵泡生成素免疫组化染色鉴定,MTT法检测细胞增殖能力,检测颗粒细胞体外分泌雌激素含量.结果 在使用不同方法分离颗粒细胞时,Precoll+胰酶、Precoll+Ⅰ型胶原酶、Precoll+透明质酸酶3种方法得到细胞数量多于裂解法及裂解+胰酶法(P<0.05).各种分离方法的细胞生长趋势并无明显差异.裂解法、裂解+胰酶法雌激素含量高于Precoll+胰酶、Precoll+Ⅰ型胶原酶、Precoll+透明质酸酶(P<0.05).结论 5种方法均成功分离得到颗粒细胞,但每种方法各有优缺点,根据实验目的不同需选择不同的方法.     

血清饥饿对原代人脐静脉内皮细胞周期同步化的影响

目的探讨人脐静脉内皮细胞（human umbilical vein endothelial cells, HUVECs）的最佳饥饿条件,以建立高效稳定的 HUVECs体外分离提取方法,并为HUVECs相关实验提供研究基础。方法用0.1%Ⅱ型胶原酶灌注脐静脉腔消化15 min,收集 细胞并用内皮细胞专用培养基（含5%内皮细胞基础培养基、1%内皮细胞生长因子、1%青链霉素）,置37 ℃,5% CO2培养箱培 养。在倒置显微镜下观察细胞形态特点,并用细胞免疫荧光方法对所得细胞进行鉴定。用流式细胞术检测所得HUVECs的纯 度,并检测0%、0.1%、0.5%、1%血清浓度的培养基饥饿处理0、6、12、18、24 h对细胞周期的影响。结果0.1%Ⅱ型胶原酶消化可 以得到HUVECs,细胞培养呈典型的铺卵石状排列,细胞较密处呈涡旋状排列。免疫荧光检测细胞VIII因子相关抗原表达呈阳 性。流式检测细胞纯度高达99.67%。不同血清浓度培养基培养6 h可获得70%左右的G0/G1期细胞;培养12 h可获得80%~90% 的G0/G1期细胞;培养18、24 h 可获得95%左右的G0/G1期细胞。结论0.1%Ⅱ型胶原酶充盈静脉管腔可以获得高纯度的原代 HUVECs。完全无血清培养基培养12 h即可获得纯度超过80%的G0/G1期HUVECs。     

组织工程心脏瓣叶体外实验研究--内皮细胞分离及鉴定

目的探讨组织工程心脏瓣叶种子细胞--内皮细胞的体外分离、培养及鉴定.方法杂种猪4头,取整段主动脉.使用0.25%Ⅱ型胶原酶消化分离血管内皮细胞.使用M199培养、扩增内皮细胞.使用倒置显微镜、免疫组化方法及透射电子显微镜对内皮细胞进行鉴定.结果倒置显微镜结果显示原代细胞及经传代培养后的细胞,呈现典型的内皮细胞特征,呈铺路石样改变.免疫组化检测示内皮细胞Ⅷ因子相关抗原呈阳性反应.透射电镜显示细胞间存在上皮细胞特有紧密连接,未发现内皮细胞Webel-Palade小体结构.内皮细胞经3～4次传代,细胞数量可增殖达到6×106.结论使用胶原酶消化法可有效分离内皮细胞,种子细胞经体外培养扩增达到一定数量,可用于组织工程心脏瓣叶的种植.     

胶原酶消化刮取再消化法分离培养犬静脉内皮细胞的实验研究

目的 探讨犬大隐静脉内皮细胞(endothelial cells,ECs)体外分离培养的新方法.方法 通过将内膜翻转后结扎两端,0.1％胶原酶消化后刮下内皮层,用胶原酶再消化法获取内皮细胞,用低糖DMEM培养基再加入适量内皮细胞生长因子培养,以0.25％胰蛋白酶进行消化传代培养.用免疫荧光法、免疫组织化学法及光镜、扫描...     

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.