刺梨提取单体CL-1对胃癌细胞系增殖的抑制作用

目的观察刺梨提取物CL-1对抗胃癌细胞系SGC-7901和MKN-45体外增殖的抑制作用.方法采用MTT检测法和生长曲线的绘制,观察CL-1对胃癌SGC-7901和MKN-45细胞增殖的影响.结果MTT法检测显示,CL-1(10-8-10-4mol·L-1)对SGC-7901和MKN-45细胞生长的抑制作用均呈现剂量依赖性和时间依赖性.细胞生长曲线显示:随CL-1剂量的增加,SGC-7901和MKN-45细胞的生长曲线逐渐右移.结论CL-1具有体外抗肿瘤作用.     

烷氧染料木黄酮衍生物的合成及其抗癌活性研究

目的研究烷氧染料木黄酮衍生物的体外抗癌活性。方法在催化剂的作用下,染料木黄酮与卤代烃发生取代反应,生成了一系列染料木黄酮衍生物,并通过MTT法检测其对人急性粒细胞性白血病（HL-60）细胞、人结肠癌（HT-29）细胞和人胃癌（SGC-7901）细胞的增殖抑制作用。结果合成了4个烷氧取代染料木黄酮衍生物,其中化合物3a（4′,5,7-三甲基染料木黄酮）对HL-60、HT-29和SGC-7901细胞增殖的抑制作用均强于5-氟尿嘧啶（5-Fu）。结论染料木黄酮衍生物3a具有潜在的抗癌活性。     

雷公藤甲素对人胃癌细胞株SGC-7901增殖的抑制作用及其机制

目的 观察雷公藤甲素对激素依赖性人胃癌细胞株SGC-7901增殖的抑制作用,并初步探讨可能的机制。方法 MTT法检测雷公藤甲素对SGC-7901细胞增殖的抑制作用,流式细胞仪检测雷公藤甲素对SGC-7901细胞周期的影响,Western blotting法观察雷公藤甲素对SGC-7901细胞内雌激素受体（ER-α）蛋白表达的影响。结果 雷公藤甲素对SGC-7901细胞增殖有显著的抑制作用,并呈现良好的量-效关系。雷公藤甲素还能有效地使SGC-7901的细胞周期阻滞在S期,同时明显下调ER-α蛋白的表达。结论 雷公藤甲素能抑制人胃癌细胞SGC-7901增殖并且使细胞周期阻滞在S期,其对SGC-7901细胞增殖的抑制作用和周期阻滞作用的机制可能与其下调ER-α的表达有关。     

大豆异黄酮诱导人胃癌细胞株SGC-7901凋亡的研究

目的:探讨大豆异黄酮对体外培养的人胃癌细胞SGC-7901生长的抑制和诱导细胞凋亡的作用.方法:用MTT法检测药物效应,透射电镜及流式细胞仪观察大豆异黄酮处理SGC-7901细胞后细胞周期和细胞凋亡.结果:(1)MTT法证实大豆异黄酮对SGC-7901细胞生长有抑制作用,并呈剂量-效应关系.(2)流式细胞仪分析大豆异黄酮处理SGC-7901细胞后细胞滞留于G2/M期,并可见凋亡峰.(3)透射电镜可见SGC-7901细胞出现典型的凋亡细胞形态学改变.结论:大豆异黄酮对人胃癌细胞SGC-7901有抑制作用,抑制作用与诱导胃癌细胞凋亡、阻抑细胞周期进程有关,诱导胃癌细胞凋亡、阻抑细胞周期进程是大豆异黄酮抗胃癌作用的机制之一.     

曲古抑菌素A对人胃癌细胞SGC-7901生长及bcl-2、caspase-3mRNA表达的影响

目的研究曲古抑菌素A（TSA）对人胃癌细胞的增殖、凋亡及bcl-2、caspase-3 mRNA表达的影响及其意义。方法体外培养人胃癌细胞株SGC-7901,MTT法检测不同浓度TSA作用不同时间后细胞的增殖情况;流式细胞术检测不同浓度TSA作用48 h后的细胞凋亡情况;RT-PCR检测胃癌细胞中bcl-2、caspase-3 mRNA表达情况。结果不同浓度TSA作用不同时间后,随着时间延长及浓度增高,细胞的增殖抑制明显,呈现明显时间-效应关系及剂量效应关系;与阴性对照组比较,随着TSA浓度的增加,胃癌细胞SGC-7901的早期凋亡率逐渐增高,差异有统计学意义（P〈0.05）;与阴性对照组比较,胃癌细胞中bcl-2 mRNA随TSA浓度的增高,表达逐渐下调,而caaspase-3mRNA随TSA浓度的增高表达逐渐上调,差异有统计学意义（P〈0.05）。结论 TSA对人胃癌细胞SGC-7901具有明显生长抑制作用,呈时间与剂量依赖性;能诱导人胃癌细胞SGC-7901发生早期凋亡能诱导胃癌细胞株SGC-7901细胞发生早期凋亡;TSA抑制人胃癌细胞SGC-7901增殖与诱导凋亡作用可能与bcl-2 mRNA表达下调、caspase-3mRNA表达上调有关。     

miRNA-101在胃癌组织和细胞中的表达及对胃癌生物学行为的影响

目的:探讨miRNA-101在胃癌组织和细胞中的表达情况及对胃癌细胞生物学行为的影响.方法:应用实时荧光定量PCR法分析31例胃癌组织和癌旁组织样本以及人胃癌细胞系SGC-7901、MKN45、人正常胃黏膜上皮细胞系GES1中miRNA-101的表达水平;建立miRNA-101重组腺病毒载体感染胃癌细胞系SGC-7901、MKN45,对照组为感染阴性对照病毒的胃癌细胞系SGC-7901、MKN45,MTT法检测miRNA-101对胃癌细胞增殖能力的影响;Transwell小室法检测胃癌细胞的迁移和侵袭能力.结果:胃癌组织中miR-101表达水平明显低于癌旁组织(P<0.01);miR-101在细胞系SGC-7901和MKN45中的表达量明显低于人正常胃黏膜上皮细胞系GES1(P<0.01).孵育48 h后MKN45细胞miRNA-101组的细胞增殖能力低于其对照组(P<0.05);而孵育72 h后SGC-7901细胞和MKN45细胞的miRNA-101组细胞增殖能力均亦低于相应对照组(P<0.05).迁移试验结果显示,miRNA-101组迁移的胃癌细胞SGC-7901和MKN45的平均细胞数明显低于相应对照组(P<0.01);侵袭实验结果显示,miRNA-101组侵袭的胃癌细胞SGC-7901和MKN45的平均细胞数亦明显低于其对照组(P<0.01).结论:miRNA-101在胃癌组织和胃癌细胞系中表达下调,转染miRNA-101可明显降低SGC-7901和MKN45细胞的增殖、迁移、侵袭能力,miRNA-101可能参与了胃癌疾病的发生及发展.     

奥曲肽抑制人胃癌细胞株MKN45的生长

目的 探讨奥曲肽（Octreotide,OCT)对人胃癌细胞株MKN45生长的调控作用。方法 采用MTT比色分析法分别测定OCT对生长于无血清培养基及含10％胎牛血清（FBS）培养基中MKN45细胞的调控作用。结果 OCT10^-2,10^-3,10^-4g/L对培养于无血清培养基中的MKN45的生长均有抑制作用，以10^-3g/L浓度的抑制作用最显著，为10．4％；而OCT10^-2,10^-3,10^-4,10^-5,10^-6g/L对生长于含10％FBS培养基中的MKN45均未显示出抑制作用。结论 OCT可抑制无血清培养基中的MKN45的生长。胎牛血清中可能含有可快速降解OCT的肽酶，使得OCT未显示出对生长于含10％FBS培养基中的MKN45的抑制作用。     

冬凌草甲素抑制人胃癌SGC-7901细胞生长的G2/M期阻滞机制研究

目的 研究冬凌草甲素抑制人胃癌 SGC-7901 细胞生长作用及 G₂/M 期阻滞机制。方法 MTT 法检测冬凌草甲素对 SGC-7901 细胞生长的抑制作用;流式细胞术检测冬凌草甲素对 SGC-7901 细胞周期的影响;Western blotting 法检测冬凌草甲素对 Cdk1、Cyclin B1 两种蛋白表达的影响。结果 冬凌草甲素作用于 SGC-7901 细胞的 IC₅₀ 为 15.64 μmol/L;冬凌草甲素对 G₂/M 期细胞的阻滞作用随着浓度的增加而增强;Cdk1 和 Cyclin B1 蛋白的表达量随着冬凌草甲素浓度的增大显著降低。结论 冬凌草甲素通过下调 SGC-7901 细胞内 Cdk1、CyclinB1 两种蛋白的表达,阻滞细胞于 G₂/M 期而抑制 SGC-7901 细胞生长。     

黄芪多糖针对人胃癌细胞SGC-7901体外实验抑制作用

目的：体外研究不同浓度的黄芪多糖对人胃癌细胞SGC-7901增殖的影响。方法：体外培养人胃癌细胞SGC-7901,采用MTT比色法检测不同浓度（6ug/mL、12．5ug/mL、25ug/mL、50ug/mL、100ug/mL）的黄芪多糖提取液对其增殖的抑制作用,并用酶联检测仪在450nm波长处测定其光吸收值,可间接反映活细胞数量。结果：在细胞抑制实验中,加药12h后,浓度高于25ug/mL的黄芪多糖均能表现出对人胃癌细胞SGC-7901的增殖的抑制作用,同时MTT实验结果表明,在药物浓度12．5ug/mL时,人胃癌细胞SGC-7901的增殖因药物浓度低,有上升趋势。随着黄芪多糖的药物浓度增加,在药物浓度50ug/mL～100ug/mL时有明显抑制人胃癌细胞SGC-7901生长的趋势,并呈浓度依赖性。结论：黄芪多糖在体外实验对人胃癌细胞SGC-7901的增值有较强的肿瘤抑制作用。     

染料木素对神经母细胞瘤细胞增殖的抑制作用

目的：探讨染料木素对儿童神经母细胞瘤有无潜在的治疗价值。方法：应用细胞生长抑制效应和四甲基偶氮唑蓝法（MTT）于体外观察染料木素对神经母细胞瘤细胞株SH—SYSY增殖的影响。结果：10．0～60．0μg／ml的染料木素明显抑制细胞的增殖。结论：染料木素可能成为治疗神经母细胞瘤的有效药物。     

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.