猪肝细胞的分离与原代培养

目的：建立稳定的猪肝细胞的分离与原代培养体系,满足生物人工肝体外支持系统对肝细胞的需求。 方法:应用改良Seglen法进行肝脏原位胶原酶灌流分离猪肝细胞,进行平面培养,动态观察细胞生长过程中的形态结构变化。 结果：平均每只猪可获得2×10¹⁰个肝细胞,细胞活率达到92.5%。在平面培养过程中维持了正常肝细胞的形态。 结论：原位胶原酶灌流法是获得大量高活率的猪肝细胞的首选方法,猪肝细胞原代分离培养是目前解决组合型生物人工肝脏（HBLSS）应用中细胞来源问题的主要途径。     

长爪沙鼠肝星状细胞的分离培养与鉴定

目的探索长爪沙鼠稳定、经济的肝星状细胞分离和培养方法,为深入探讨长爪沙鼠肝纤维化的细胞机制提供技术支撑。方法取成年雄性长爪沙鼠,用链蛋白酶、胶原酶及DNA酶体内门静脉灌注消化长爪沙鼠肝脏细胞,经Nycodenz密度梯度离心,分离肝星状细胞。台盼蓝拒染实验鉴定细胞活力,α-SMA,Desmin免疫细胞化学染色鉴定细胞性质。结果肝星状细胞得率为0.5~1×107/肝。肝星状细胞存活率在90%以上。原代培养3 dα-SMA阳性细胞达75%以上,传代培养后,α-SMA,Desmin阳性达100%。结论成功建立了稳定可靠的长爪沙鼠肝星状细胞分离培养方法,为肝脏相关疾病研究和防治药物的开发提供了技术支持。     

大鼠肝细胞原代培养技术因素的探讨

目的:探讨影响大鼠肝细胞原代培养的技术因素。方法:以Seglen原位两步灌流法分离培养大鼠肝细胞为基础,分离培养大鼠肝细胞。结果:活细胞分离存活率>85%,12~16小时肝细胞贴壁生长良好。结论:为进一步开展肝细胞培养奠定良好基础。     

肝脏灌注分离大鼠肝细胞及原代培养的方法

目的　建立分离及原代培养大鼠肝细胞的实验技术方法。方法　先后用无Ca2 灌流液及 0 .0 5 %Ⅳ型胶原酶灌注大鼠肝脏 ,分离肝细胞 ,进行原代培养。结果　用台盼蓝排除试验测肝细胞活率大于 90 % ,产率大于 3 .0× 10 8个活细胞。结论　灌注分离大鼠肝脏可获得大量肝细胞 ,而且存活率高 ,原代培养 2 4h后肝细胞完全贴壁 ,形成单层     

乳兔和成年兔肝细胞体外分离及培养的比较研究

目的 研究比较体外分离培养乳兔和成年兔肝细胞增殖活性及功能。方法 采用非灌注胶原酶消化法分离乳兔和成年兔肝细胞,比较细胞产率和细胞活率,均采用DMEM培养液（含10%胎牛血清）培养,计数法观察原代细胞增殖变化,MTT法观察传代细胞增殖情况,检测培养液中白蛋白含量变化。培养过程采用相差显微镜进行形态学观察,培养细胞采用PAS染色法鉴定。结果 分离收获乳兔肝细胞较成年兔肝细胞数目多,活率高。培养过程中,乳兔肝细胞较成年兔肝细胞折光性好,生长快,增殖能力强,培养液上清蛋白含量高并且增长速度较快,具有统计学意义。PAS染色观察,乳兔和成年兔肝细胞胞质中充满大量糖原颗粒,两者差异无显著性。结论 乳兔肝细胞比成年兔肝细胞,更加适合体外培养研究。     

分离活体小鼠肝细胞的改良灌流法

Berry等首先建立了生理条件下用胶原酶灌流肝脏分散肝细胞，获得了成功，后来经过Seglen等发展，使这种胶原酶灌流技术更加完善。虽然Seglen灌流法细胞产量大、存活率高．但需特殊灌流装置、胶原酶耗费多、操作难度大，不易掌握。为建立一种便于各实验室开展简便、廉价的分离肝细胞方法，我们设计了分离小鼠肝细胞改良灌流法。经初步应用，获得了良好效果。     

一种SD大鼠肝细胞原代培养的改良方法

目的 建立一种改良的大鼠肝细胞原代培养方法.方法取6到7周龄SD 大鼠（约200g）,3%戊巴比妥钠麻醉,采用Seglen两步胶原酶灌流法分离肝细胞,Percoll密度梯度离心纯化肝细胞,种植在预先用gelatin处理的培养皿内.结果 分离所得肝细胞成活率达95%以上.24h后用相差显微镜观察细胞贴壁良好,细胞形态规则;48h后细胞开始伸展.结论 使用改良的方法获得的细胞成活率高,贴壁牵,适合常见的药理毒理实验.     

小鼠原代肝细胞的分离与培养

目的 探索小鼠原代肝细胞细胞分离培养的简化方法,并对其生物学特性进行鉴定。方法 分离出生2～3 d小鼠肝组织,利用低温下机械剪碎法结合胶原酶消化,分离小鼠原代肝细胞,利用小鼠肝表面抗原CK-19进行荧光染色鉴定。结果 成功地从乳鼠体内分离获得肝原代细胞,免疫荧光鉴定属于肝细胞。结论 利用简单的机械加酶消化法也可以获得肝组织细胞,且得率较高,细胞活力较好。     

高活力原代小鼠肝细胞的分离与纯化

目的建立一种稳定的能获得高活力和高纯度原代小鼠肝细胞的分离和纯化方法。方法对传统的两步原位胶原酶灌注法进行4个方面的优化,主要包括选择逆向灌流、将持续灌注法改为间断灌注后夹闭门静脉法、严格控制胶原酶消化时间和将分离的肝细胞悬液进行低速Percoll单密度离心纯化。分离后的肝细胞进行体外培养。肝细胞活力和得率用台盼蓝染色法检测。结果新鲜分离的小鼠原代肝细胞活力能稳定达到87%±3%,平均活细胞总数为8×105每克小鼠体重,绝大部分细胞在体外培养2h后贴壁生长。结论优化后的肝细胞分离方法更为稳定、有效,分离到的肝细胞具有高活力的优点。     

一种简化的分离与培养小鼠原代肝细胞的方法

目的 建立一种简单的能获得高纯度小鼠原代肝细胞的分离与培养方法。方法 将经典的两步灌流法简化为经下腔静脉逆向脉冲式灌注,利用低速离心法对肝细胞分离液进行纯化;利用锥虫蓝染色法鉴定细胞活率;培养瓶预先用鼠尾胶原铺备,利用倒置显微镜观察细胞形态。结果 此法得到了足够数量的肝细胞,细胞活率大于90%;细胞可稳定贴壁1周。结论 成功建立了一种简单的分离与培养小鼠原代肝细胞的方法。     

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.