运用激光捕获显微切割对食管鳞状上皮癌蛋白质组的分析

目的分析食管鳞癌与正常食管上皮细胞蛋白质的表达差异,获取鉴别两者的分子标志物。方法激光捕获显微切割技术分离食管鳞癌和正常食管上皮细胞的纯细胞,双向电泳和质谱的方法检测两者表达的差异蛋白。结果48个差异蛋白点,通过质谱鉴定出20种有意义的蛋白,其中11种蛋白如galectin7、14-3-3proteinε等在食管鳞癌细胞表达明显增高,9种蛋白如MTCBP-1等表达下调。结论激光捕获显微切割可以有效地解决组织异质性的问题;食管鳞癌和正常食管上皮细胞的2-DE蛋白质图谱具有明显的差异表达,提示食管鳞癌的发生是多种蛋白质功能共同作用的结果。     

中分化肺腺癌及癌旁组织中差异蛋白质组学分析

目的分析人中分化肺腺癌及癌旁正常组织中的差异蛋白,寻找与肺腺癌发病相关的蛋白质。方法利用双向凝胶电泳法分离肺腺癌及癌旁正常组织中的蛋白质,通过图像扫描寻找差异2倍以上蛋白点,进而应用基质辅助激光电离飞行时间质谱得到肽质量指纹图谱,对比数据库确定差异蛋白。结果肺腺癌组织及癌旁正常组织平均蛋白点数分别为1 810±167、1 704±53。共筛选出18个差异蛋白点,其中13个差异蛋白点在肺腺癌组织中表达上升。结论双向凝胶电泳技术结合基质辅助激光电离飞行时间质谱可鉴定肺腺癌及癌旁正常组织的差异蛋白,为早期诊断肺癌、判断预后提供依据。     

黄曲霉毒素B1与乙肝病毒协同诱发树鼩肝癌形成过程中的差异表达蛋白

目的 比较黄曲霉毒素B1(AFB1)与乙肝病毒(HBV)协同诱发树鼩肝细胞癌生长不同阶段的蛋白质表达谱的改变,筛查在AFB1与HBV共同诱发的肝癌发生发展中起重要作用的关键蛋白质分子.方法 用双向凝胶电泳(2-DE)及基质辅助激光解吸飞行时间串联质谱法(MALDI-TOF-MS/MS)对同一动物自身的癌发生前的肝组织(C45w)、癌发生后的肝癌组织(Cca)及未经AFB1处理的对照组动物肝组织(E45w、E105w)进行了相互比较.结果 C45w组、Cca组、E45w、E105w组分别平均检测到(1 233±30)个蛋白点(n=3),(1257±35)个蛋白点(n=3),(1 249±51)个蛋白点(n=3)和(1 208±36)个蛋白点(n=3).以各组中2-DE效果好、点数多的一块胶作为参考胶,分别进行两组间的匹配分析(E45w vs C45w、C45w vs Cca、E45w vs E105w),筛选出两组之间差异大于或等于2倍的蛋白点65个.应用质谱鉴定出细胞色素C氧化酶等25种胶内差异蛋白质.结论 在AFB1与HBV共同诱发的树鼩肝癌发生发展不同阶段有明显的差异性蛋白表达谱,为进一步对人肝癌蛋白质组的研究提供了线索.     

应用二维电泳和质谱技术筛选乳腺癌相关差异表达蛋白质的初步研究

目的:通过分离并鉴定乳腺癌、癌旁和正常乳腺组织的差异表达蛋白质,以发现可能用于早期诊断的乳腺癌肿瘤标志物.方法:提取人乳腺癌、癌旁和正常乳腺组织的总蛋白质,用双向电泳分离蛋白并进行比较.选择在乳腺癌组织中明显差异表达的蛋白点,行质谱分析.结果:获得了分辨率和重复性均很好的凝胶蛋白图谱.对筛选出的在乳腺癌组织中明显差异表达的20个蛋白点,共有13个蛋白点被成功鉴定,其中在乳腺癌组织巾高表达的为8个,低表达的为5个.结论:乳腺癌组织相对于癌旁、正常乳腺组织蛋白存在明显的差异,过蛋白质组学方法筛选并鉴定出的这些蛋白质可能成为用于早期诊断和评价预后的乳腺癌标志物.     

激光捕获显微切割技术纯化的肺鳞癌原发灶与 淋巴结转移灶肿瘤细胞的比较蛋白质组学

目的：筛选肺鳞癌淋巴结转移相关的蛋白质。 方法：采用激光捕获显微切割技术(laser capture microdissection,LCM)分别从肺鳞癌原发灶组织和匹配的淋巴结转移灶癌组织中切割纯化鳞癌细胞;应用二维凝胶电泳(two-dimensional electrophoresis,2-DE)分离LCM纯化细胞的蛋白质;图像分析识别差异表达的蛋白质点;基质辅助激光解吸电离飞行时间质谱鉴定差异蛋白质点,Western印迹验证差异蛋白Rho-GDIα在LCM纯化的肺鳞癌原发灶肿瘤细胞（lung primary tumor cells, LPTC）和匹配的淋巴结转移灶肿瘤细胞（lymph node metastatic tumor cells, LNMTC）中的表达。结果：建立了LCM纯化的LPTC和匹配的LNMTC的2-DE图谱,质谱鉴定了22个差异蛋白质,与LPTC相比,8个蛋白质在LNMTC中表达明显增高。结论：22个差异蛋白可能与肺鳞癌淋巴结转移有关,为筛选肺鳞癌转移标志物奠定了基础。     

激光捕获显微切割技术纯化的肺鳞癌原发灶与淋巴结转移灶肿瘤细胞的比较蛋白质组学

目的：筛选肺鳞癌淋巴结转移相关的蛋白质。方法：采用激光捕获显微切割技术（lasercapture microdissection,LCM）分别从肺鳞癌原发灶组织和匹配的淋巴结转移灶癌组织中切割纯化鳞癌细胞;应用二维凝胶电泳（two-dimensional electrophoresis,2-DE）分离LCM纯化细胞的蛋白质;图像分析识别差异表达的蛋白质点;基质辅助激光解吸电离飞行时间质谱鉴定差异蛋白质点,Western印迹验证差异蛋白Rho-GDIα在LCM纯化的肺鳞癌原发灶肿瘤细胞（lung primary tumor cells,LPTC）和匹配的淋巴结转移灶肿瘤细胞（lymph node metastatic tumor cells,LNMTC）中的表达。结果：建立了LCM纯化的LPTC和匹配的LNMTC的2-DE图谱,质谱鉴定了22个差异蛋白质,与LPTC相比,8个蛋白质在LNMTC中表达明显增高。结论：22个差异蛋白可能与肺鳞癌淋巴结转移有关,为筛选肺鳞癌转移标志物奠定了基础。     

Research of the relationship between liver cancer stem cells and vasculogenic mimicry

目的 研究肝癌血管生成拟态(VM)形成与肝癌干细胞的关系.方法 在体外分别建立肝癌细胞株HCC97H、SMMC7721以及正常肝细胞L02三维培养,观察它们各自形成VM的能力.利用激光捕获显微切割技术分离出形成VM的肝癌细胞,RT-PCR和Western blot分别检测内皮相关分子VE-cadherin、CD31及肝癌干细胞标志物CD133和CD34表达水平.结果 ① HCC97H细胞在三维培养下形成VM; SMMC7721和正常肝细胞L02不形成VM;②激光捕获显微切割成功捕获目的 细胞;③各组中VE-cadherin mRNA和蛋白的表达差异有统计学意义(P＜0.05).CD31在肝癌细胞中不表达.CD133 mRNA和CD34 mRNA在各组中表达差异有统计学意义(P＜0.05);CD133和CD34蛋白在各组间表达差异有统计学意义(P＜0.05).结论 肝癌干细胞表达与肝癌细胞VM的形成有关.     

肝纤维化组织相关功能蛋白质组的差异分析

目的建立肝纤维化组织双向凝胶电泳图谱,初步分析蛋白质组的变化与差异表达。方法利用2-DE分离肝纤维化组织和正常肝组织总蛋白质后,经图像分析识别差异表达的蛋白点,应用基质辅助激光解吸电离飞行时间质谱鉴定差异蛋白质,并用Western印迹方法对其中3个蛋白质的表达水平变化进行验证。结果比较分析肝纤维化组织和正常肝组织的2-DE图谱,找到差异蛋白点59个,其中在肝纤维化组织表达上调30个,下调29个。并对其中15个表达差异3倍以上的蛋白点进行了肽质量指纹图分析,鉴定出10个与细胞信号转导、细胞增殖、氧化应激有关的蛋白质,14-3-3β、DJ-1及PEBP蛋白的Western印迹验证结果与2-DE的检测结果相一致。结论肝纤维化组织和正常肝组织之间存在一些差异表达的蛋白质,为进一步阐明肝纤维化的发生机制奠定基础。     

肝癌干细胞表达与血管生成拟态形成的研究

目的研究肝癌血管生成拟态(VM)形成与肝癌干细胞的关系。方法在体外分别建立肝癌细胞株HCC97H、SMMC7721以及正常肝细胞L02三维培养,观察它们各自形成VM的能力。利用激光捕获显微切割技术分离出形成VM的肝癌细胞,RT-PCR和Western blot分别检测内皮相关分子VE-cadherin、CD31及肝癌干细胞标志物CD133和CD34表达水平。结果①HCC97H细胞在三维培养下形成VM;SMMC7721和正常肝细胞L02不形成VM;②激光捕获显微切割成功捕获目的细胞;③各组中VE-cadherin mRNA和蛋白的表达差异有统计学意义(P<0.05)。CD31在肝癌细胞中不表达。CD133 mRNA和CD34 mRNA在各组中表达差异有统计学意义(P<0.05);CD133和CD34蛋白在各组间表达差异有统计学意义(P<0.05)。结论肝癌干细胞表达与肝癌细胞VM的形成有关。     

激光捕获显微切割技术在食管鳞癌蛋白质组学研究中的应用

目的:探讨激光捕获显微切割技术(1aser capture microdissection system,LCM)在获得较单一食管鳞癌细胞中的价值,为食管癌组织蛋白质组学的研究奠定基础.方法:通过激光捕获显微切割技术获取食管鳞癌和正常食管上皮细胞,采用双向凝胶电泳方法分离蛋白质,采用计算机辅助的图像分析技术比较分析凝胶图像.结果:激光捕获了较纯的目的细胞,获得到了分辨率和重复性较好的双向凝胶电泳图谱,比较分析发现38个蛋白点的表达量存在明显差异,其中新增蛋白点3个,缺失5个,20个蛋白点明显上调,10个蛋白点发生明显下调.结论:本研究结果提示LCM技术能较好地获取较为均一的目的细胞,并发现食管鳞癌与正常食管上皮细胞蛋白质表达存在明显差异,可能与食管鳞癌发生机制有关.     

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.