抑制巨噬细胞Act 1表达对黑色素瘤肺转移的影响

目的本文通过建立黑色素瘤肺转移模型,研究巨噬细胞NF-κB活化因子1(nuclear factor kappa B activator 1,Act 1)对黑色素瘤肺转移的影响。方法以抑制巨噬细胞Act 1表达的小鼠(anti-Act 1)为研究对象,通过尾静脉注射B16-F10细胞诱导肺转移模型,采用HE染色法检测小鼠肺组织的转移情况;免疫组化方法分析肿瘤细胞的增殖指数和白细胞、巨噬细胞的浸润情况。结果与C57小鼠相比,在尾静脉注射B16-F10细胞20 d后,实验组anti-Act 1小鼠肺组织转移灶面积、数量较少;Ki67、CD45、CD68表达量较低。结论靶向抑制巨噬细胞Act 1表达能够显著减轻黑色素瘤肺转移程度。     

对小鼠黑色素瘤细胞肺转移的抑制作用mGM-CSF基因转染

目的探讨小鼠粒细胞巨噬细胞-集落刺激因子(mGM-CSF)基因转导对B16黑色素瘤细胞肺转移的抑制效果.方法应用脂质体将含有mGM-CSF基因的真核表达载体转染B16小鼠黑色素瘤细胞,经G418加压筛选后,挑选表达mGM-CSF基因的B16黑色素瘤细胞.观察转导或未转导mGM-CSF基因的B16黑色素瘤细胞在Balb/c小鼠体内的肺转移.结果转导mGM-CSF基因的B16黑色素瘤细胞可以稳定表达mGM-CSF,在小鼠模型上其肺转移灶数目显著少于未转染基因的黑色素瘤细胞对照组,二者差异显著(n=5,125.8±34.3vs27.8±24.0,P<0.01).结论mGM-CSF转导可显著抑制小鼠黑色素瘤细胞B16的肺转移,提示GM-CSF具有治疗黑色素瘤的临床应用前景.     

小鼠黑色素瘤肺转移过程中肿瘤细胞血管的分子机制研究

目的 研究小鼠黑色素瘤细胞肺转移早期肿瘤细胞出血管的分子机制.方法 建立稳定表达红色荧光蛋白的小鼠黑色素瘤细胞株BI6-RED,并鉴定其增殖和转移能力与B16细胞的异同.构建肺转移模型后48 h和72 h,用荧光标记血管,确定B16-RED细胞出血管的时间.建模后48 h取模型小鼠与正常小鼠肺组织进行32K小鼠全基因组...     

基于小鼠黑色素瘤肺转移模型探讨丙泊酚上调DR5表达发挥抑瘤作用的研究

目的 恶性黑色素瘤是一种恶性化程度高、易转移的由黑色素细胞恶性增殖引起的皮肤癌。本研究旨在探讨丙泊酚对小鼠B16F10黑色素瘤肺转移的抑制作用,以期为丙泊酚是否更适用于黑色素瘤相关手术麻醉提供一定的理论基础。方法 体外细胞实验采用CCK-8方法考察不同浓度的丙泊酚对B16F10细胞增殖的抑制作用;流式细胞术检测不同实验组B16F10细胞凋亡率;Western blotting法检测各实验组DR5蛋白表达的变化。体内实验采用尾静脉注射B16F10细胞方法建立模型组,将C57BL/6J雄性小鼠24只,采用随机数字表法分为4组,即正常对照组,黑色素瘤肺转移模型组,丙泊酚50 mg/kg、10 mg/kg剂量组,每组6只,观察腹腔注射丙泊酚对小鼠肺组织肿瘤转移结节的影响。结果 体外实验结果显示,对照组与10μmol/L、50μmol/L、100μmol/L 3个浓度实验组于72 h时的细胞相对增殖能力(490 nm OD值)分别为0.91±0.03、0.81±0.02、0.71±0.02和0.61±0.02;100μmol/L丙泊酚处理B16F10细胞在24 h、48 h和72 h三个时间点的...     

塞来昔布对乳腺癌阿霉素耐药细胞株MCF-7/ADM的增殖抑制作用

目的： 通过研究选择性环氯化酶2(COX-2)抑制剂塞来昔布联合阿霉素(ADM)对乳腺癌MCF-7/ADM细胞株生长的作用,探讨塞来昔布的抗肿瘤作用。方法：MCF-7/ADM细胞加入不同浓度等倍稀释的ADM（0.05、0.10、0.20、0.40、0.80和1.60 mg/L）为对照组,MCF-7/ADM细胞加入无细胞的完全培养基为阴性对照组,在对照组的基础上联合应用10、20 μmol/L塞来昔布为实验组,各组细胞于24、48、72 h后采用CCK-8检测细胞生长抑制率。MCF-7/ADM细胞单加0.05 mg?L-1ADM及联合塞来昔布(10、20 μmol/L)处理后3 h收集细胞,采用流式细胞术检测细胞内ADM水平。结果：不同浓度ADM单药及联合塞来昔布（10和20 μmol/L）　作用于MCF-7/ADM 24、48和72 h后细胞生长受到抑制,实验组不同时间细胞生长抑制率均高于对照组(P<0.05),且20 μmol/L塞来昔布实验组细胞生长抑制率高于10 μmol?L-1塞来昔布实验组,差异具有统计学意义（P<0.05）。对照组24、48和72 h的细胞未见明显变化,但实验组细胞作用48和72 h后出现细胞改变及死亡,呈塞来昔布剂量依赖性。与对照组比较,塞来昔布实验组（10和20 μmol/L）细胞内ADM浓度升高（P<0.05）;20 μmol/L塞来昔布实验组细胞内ADM浓度高于 10 μmol/L塞来昔布实验组(P<0.05)。结论：选择性COX-2抑制剂塞来昔布联合ADM可有效逆转乳腺癌ADM细胞株耐药。
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含鼠GM-CSF基因的腺病毒载体对荷B16黑色素瘤小鼠免疫功能的影响

目的：研究含鼠GM-CSF基因的腺病毒载体（AdCMVGM-CSF）直接注射荷B16黑色素瘤小鼠瘤体内对小鼠免疫功能的影响。 方法：将B16黑色素瘤细胞（5×10⁶/只）接种于C57/BL6小鼠右侧背部皮下后,将荷瘤小 鼠随机分为2组,每组12只,待瘤体直径达5 mm时分别注射AdCMVGM-CSF、AdCMVLacZ （5×10⁸ PFU/只）,检测每组小鼠的免疫功能及其对B16黑色素瘤的抑制作用。 结果：AdCMVGM-CSF实验组小鼠注射后第10天,荷瘤鼠血清中GM-CSF水平［(1 563.72±136.58)ng·L^-1］高于对照组（P<0.01）,肿瘤组织周围的CD8＋ T细胞表达明显增强。 结论：AdCMVGM-CSF可增强荷B16黑色素瘤小鼠的抗肿瘤免疫反应,具有抑制肿瘤生长的作用。     

黄芪多糖对小鼠B16-BL6黑色素瘤肺转移的影响

目的 探讨不同剂量的黄芪多糖对小鼠B 16-BL6黑色素瘤肺转移的影响及机制.方法 采用B 16-BL6小鼠人工肺转移模型研究不同剂量黄芪多糖对黑色素瘤肺转移的影响;测量给药后小鼠免疫器官指数的变化探讨其可能的机制.结果 高剂量组的黄芪多糖能够显著抑制小鼠B16-BL6黑色素瘤肺转移,并能增加小鼠脾脏指数.结论 高剂量黄芪多糖可能通过增强免疫达到抗黑色素瘤细胞肺转移的作用.     

塞来昔布对Lewis肺癌细胞增殖及移植瘤的抑制作用

目的:探讨选择性环氧化酶-2(COX-2)抑制剂塞来昔布对Lewis肺癌细胞株增殖及小鼠皮下移植瘤的影响。方法:常规培养Lewis肺癌细胞,实验分为对照组和塞来昔布用药组。MTT法检测细胞增殖水平,损伤修复实验检测细胞迁移能力;将Lewis肺癌细胞接种于12只C57BL/6小鼠皮下,对照组隔日腹腔注射生理盐水;塞来昔布用药组隔日腹腔注射塞来昔布30 mg/kg,24 d后处死,计算抑瘤率,逆转录聚合酶链反应(RT-PCR)技术检测移植瘤组织中VEGF mRNA表达水平,同时酶联免疫检测小鼠血清中MMP-9浓度。结果:塞来昔布对Lewis肺癌细胞增殖的抑制作用呈时间-剂量依赖性效应(P<0.05)。20μmol/L塞来昔布组细胞迁移速度(0.37±0.03)μm/h明显减慢,与对照组(3.17±0.22)μm/h相比具有显著性差异(P<0.01);在体实验显示,塞来昔布具有明显的抑制Lewis肺癌移植瘤增殖的作用,同时能抑制移植瘤组织中VEGF表达、降低血清MMP-9浓度。结论:塞来昔布可以显著抑制Lewis肺癌细胞的增殖与迁移能力,且对Lewis肺癌移植瘤有明显抑制作用。     

SurvivinT34A突变体对小鼠B16肺转移瘤的治疗作用

目的 研究阳离子脂质体介导的Survivin基因负性突变体SurvivinT34A对小鼠B16肺转移瘤的治疗作用,并探讨其作用机理.方法 尾静脉接种小鼠黑色素瘤细胞B16建立肺转移模型,接种后第3 d将18只荷瘤鼠随机分为生理盐水组(NS组)、空载体组(pORF9组)和重组质粒pORF9-mSurvivinT34A治疗...     

脂质体白细胞介素Ⅱ对小鼠b16黑色素瘤肺转移反脾细胞增殖的影响

小鼠尾静脉注射B16黑色素瘤细胞,腹腔注射脂质体白细胞介素Ⅱ和未包裹白细胞介素Ⅱ(IL—2),连续10d,检测小鼠肺湿重、肺转移结节数和ConA诱导的脾细胞DNA掺入量。结果表明,IL—2可抑制小鼠B16黑色素瘤肺转移,促进ConA刺激的脾细胞增殖,并与剂量明显相关。脂质体包裹IL—2可使其生物活性提高约5倍。对免疫功能受抑小鼠作用更为明显。     

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.