3'-大豆苷元磺酸钠对人乳腺癌细胞MCF-7的促凋亡作用

目的 研究3′-大豆苷元磺酸钠促进人乳腺癌细胞MCF-7凋亡的作用.方法 3 种人乳腺癌细胞系(MCF-7、MDA-MB-231和SK-BR-3)与不同浓度的3′-大豆苷元磺酸钠共孵育 24 h,MTT法检测细胞存活率,流式细胞术和Hoechst 33258 染色检测细胞凋亡.结果 3′-大豆苷元磺酸钠能够抑制 3 种...     

罗格列酮对人乳腺癌MDA-MB-231细胞的体外抗肿瘤作用

目的:研究过氧化物酶体增殖物激活受体γ(PPARγ)激动剂罗格列酮对人乳腺癌细胞MDA-MB-231体外生长影响,以评价其在人乳腺癌治疗上的应用潜力. 方法:噻唑蓝(MTT)法检测罗格列酮对MDA-MB-231细胞体外生长抑制作用;应用PPARγ拮抗剂GW9662,分析罗格列酮对MDA-MB-231细胞增殖影响与PPARγ受体关系;流式细胞仪分析细胞周期,Annexin V-FITC和TUNEL法检测细胞凋亡. 结果:罗格列酮干预下MDA-MB-231细胞G0/G1期比例上升,而S期比例下降,呈量-效关系抑制其生长,IC50=5.2 μmol/L. PPARγ拮抗剂GW9662可部分逆转罗格列酮对MDA-MB-231细胞增殖抑制作用(P＜0.05);100 μmol/L罗格列酮还可诱导MDA-MB-231细胞凋亡,TUNEL法检测的凋亡率(18.4±3.1)%与Annexin V-FITC法检测的结果一致[(16.6±2.7)%](P＞0.05). 结论:罗格列酮通过PPARγ介导,使MDA-MB-231细胞G1期阻滞而抑制其增殖,高浓度时还可诱导其发生凋亡,罗格列酮有望成为治疗乳腺癌的有效药物.     

多西紫杉醇对乳腺癌干细胞的作用研究

目的 通过研究多西紫杉醇对乳腺癌细胞系MCF-7、MDA-MB-231及原代乳腺癌干细胞在体外的影响,观察多西紫杉醇对乳腺癌干细胞的作用,从而为选择针对乳腺癌干细胞治疗的药物提供理论依据.方法 利用流式细胞仪,分别从原代乳腺癌细胞、乳腺癌细胞系MCF-7、MDA-MB-231中,分选出细胞表型为CD+44、CD-/low24、ESA+的乳腺癌干细胞.将分选出来的3种乳腺癌干细胞及未分类细胞分别置于含有不同浓度多西紫杉醇的培养液中,测得多西紫杉醇对不同干细胞的生长抑制曲线,并利用流式细胞仪进行细胞周期及细胞凋亡的分析.结果 原代乳腺癌、MCF-7、MDA-MB-231细胞系干细胞比例分别为(0.50±0.26)%、(1.40±0.26)%和(1.63±0.32)%.四甲基偶氮唑盐(MTT)试验显示各系乳腺癌干细胞均对多西紫杉醇有一定的耐药性:其中MDA-MB-231未分类细胞、干细胞的半数抑制浓度(IC50)分别为34 nmol/L和12.422 μmol/L(P＜0.01);MCF-7 两类细胞的IC50分别为31 nmol/L和8.357 μmol/L(P＜0.01);原代乳腺癌两类细胞的IC50分别为51 nmol/L 和17.688 μmol/L(P＜0.01).且多西紫杉醇对乳腺癌干细胞的抑制作用呈浓度依赖性.多西紫杉醇对乳腺癌干细胞表现出了一定的G2/M期周期阻滞作用,且干细胞早期凋亡率随药物作用时间的增加而升高,呈时间依赖性.结论 多西紫杉醇对乳腺癌干细胞增殖生长有一定的抑制作用,降低了乳腺癌干细胞的成瘤性,且该作用呈浓度依赖性和时间依赖性.     

白藜芦醇对人乳腺癌MDA-MB-231细胞生长、迁移及侵袭的影响

目的 研究白藜芦醇对人乳腺癌MDA-MB-231细胞生长、迁移及侵袭的影响.方法 采用MTr法和软琼脂集落形成实验测定白藜芦醇对MDA-MB-231细胞生长的影响;采用Transwell小室迁移、侵袭实验检测白藜芦醇对细胞迁移、侵袭能力的影响.结果 白藜芦醇浓度在25～200μmol/L时,作用6,12,24,48,72 h后,抑制MDA-MB-231细胞增殖,抑制作用呈时间和浓度依赖性(P＜0.01).白藜芦醇抑制MDA-MB-231细胞在软琼脂中的集落形成能力随着白藜芦醇浓度的增大集落形成率减小.25、50、100、200 μmol/L的白藜芦醇作用24 h可以明显抑制MDA-MB-231细胞的迁移和侵袭能力(P＜0.01).结论 白藜芦醇能有效抑制人乳腺癌MDA-MB-231细胞的生长,并通过抑制细胞对细胞间基质的降解作用抑制其侵袭和迁移能力.     

Rab23分子在乳腺癌细胞中的表达及意义

目的Rab23作为hedgehog信号通路中负调节分子,可能成为治疗肿瘤的新靶点。文中旨在明确Rab23分子在不同类型的乳腺癌细胞中是否表达及表达量情况。方法选取3种乳腺癌细胞系MDA-MB-231、Bcap-37、MCF-7和正常乳腺细胞系HBL-100为实验对象,采用RT-PCR和免疫荧光检测检测Rab23 mRNA及蛋白在细胞中的表达。结果RT-PCR结果显示在正常乳腺细胞和乳腺癌细胞系中均有Rab23 mRNA的表达,且在MCF-7细胞中表达量最少,其次为HBL-100细胞,表达量最多的MDA-MB-231和Bcap-37与MCF-7和HBL-100比较,差异有统计学意义(P<0.05),但MDA-MB-231与BCap-37之间比较差异无统计学意义(P>0.05)。免疫荧光提示Rab23分子主要分布在乳腺癌细胞胞核周围的细胞质中。结论Rab23分子在MDA-MB-231、Bcap-37、MCF-73种乳腺癌细胞中均有表达,且在MDA-MB-231和Bcap-37中表达较多,可为进一步探讨Rab23对乳腺癌细胞的作用和机制提供理论依据。     

3,6-二羟基黄酮对多种肿瘤细胞的增殖抑制及凋亡诱导作用

目的 观察3,6-二羟基黄酮对乳腺癌细胞株MCF-7(雌激素受体阳性ER+)、MDA-MB-231(雌激素受体阴性ER-)、直肠癌细胞株LoVo、DLD-1和前列腺癌细胞株PC3增殖和凋亡的影响.方法 MTT法检测3,6-二羟基黄酮对不同肿瘤细胞生长存活的影响,计算半数抑制浓度(IC50);DAPI染色观察3,6-二羟基黄酮对肿瘤细胞生长状态及形态的影响,Annexin V/PI双染流式细胞仪检测细胞凋亡变化.结果 增殖检测结果表明,3,6-二羟基黄酮对于MCF-7、MDA-MB-231、LoVo、DLD-1和PC3细胞增殖均表现出显著抑制作用,48 h IC50值分别为16.1、15.7、29.8、12.8和17.8μmol/L;细胞形态观察和凋亡检测结果表明,10 μmol/L的3,6-二羟基黄酮作用24 h,5种肿瘤细胞的生长状态和形态均发生显著变化,大量细胞表现出凋亡或死亡细胞的形态特征,细胞凋亡率均显著升高.结论 3,6-二羟基黄酮具有显著的抗肿瘤效应,对于多种肿瘤细胞具有很强的增殖抑制和凋亡诱导作用.     

MiR-216a-5p靶向TRIP4对乳腺癌细胞放射敏感性的影响及机制研究

目的:研究miR-216a-5p对乳腺癌细胞放疗敏感性的影响及其作用机制.方法:培养正常乳腺上皮细胞MCF10A和乳腺癌细胞MCFF7、MDA-MB-231、SK-BR-3,用实时荧光定量PCR(qPCR)检测miR-216a-5p和甲状腺激素受体相互作用蛋白4(TRIP4)的表达;将乳腺癌细胞MCF7分为Contro...     

siRNA沉默葡萄糖调节蛋白78可增强乳腺癌细胞对顺铂的敏感性

目的探讨siRNA沉默葡萄糖调节蛋白78（GRP78）增强顺铂对乳腺癌细胞凋亡的敏感性,以期为乳腺癌的临床治疗提供
新的靶点。方法MTT法检测不同浓度（0、1、2、4、8、16 μmol/L）顺铂对乳腺癌细胞MDA-MB-231的增殖抑制作用;PI/Annexin
V 双染检测顺铂（8 μmol/L）对siRNA转染沉默GRP78乳腺癌细胞MDA-MB-231凋亡的影响,同时将未转染和转染空质粒乳腺
癌细胞MDA-MB-231 作为空白和阴性对照;Western blot 检测顺铂（8 μmol/L）处理乳腺癌细胞MDA-MB-231 不同时间（0、6、
16、24 h）GRP78的表达以及siRNA转染沉默GRP78乳腺癌细胞MDA-MB-231 中GRP78的表达。结果8 μmol/L顺铂作用于
乳腺癌细胞MDA-MB-231 24、48、72 h细胞存活率分别为83.13%、54.22%、35.79%,但24 h细胞凋亡率仅为10.8%。将GRP78
沉默后,细胞的凋亡率为24.6%,沉默GRP78并合用顺铂进行刺激,细胞的凋亡率为48.9%,明显高于单用顺铂组。用顺铂刺激
乳腺癌细胞MDA-MB-231 GRP78表达先上调后有减弱趋势,而siRNA转染沉默GRP78后,GRP78表达明显下降。结论抑制
GRP78的表达可以增加乳腺癌细胞的凋亡率,为乳腺癌的临床治疗提供了新的靶点。
     

白藜芦醇对TRAIL诱导乳腺癌MDA-MB-231细胞凋亡的影响

目的 研究白藜芦醇对TRAIL诱导乳腺癌,MDA-MB-231细胞增殖及凋亡的影响.方法 MTT法检测细胞增殖;AnnexinV染色并流式细胞术检测细胞凋亡;分光光度法检测Caspse-8、Caspase-3相对活性;DAPI细胞核染色法观察细胞凋亡.结果 50μmol/L和100μmol/L白藜芦醇分别与50 ng/mL TRAIL联合作用后,对MDA-MB-231细胞增殖的抑制率为(62.43±2.07)%和(87.32±1.44)%;而细胞凋亡率分别为(53.59±1.44)%和(73.72±1.96)%,与单独应用相应浓度的白藜芦醇和TRAIL比较,差异均存在显著性(P＜0.01).50ng/mL TRAIL分别与50μmol/L和100μmol/L白藜芦醇联合作用后,Caspase-8、Caspase-3的相对活性为(0.282±0.008)、(0.386±0.013)及(0.437±0.05)、(0.521±0.03),与对照组及单用TRAIL、白藜芦醇比较均明显增强,差异显著(P＜0.01).结论 TRAIL与白藜芦醇联合可协同抑制MDA-MB-231细胞增殖并诱导其凋亡,白藜芦醇增强TRAIL诱导细胞凋亡的作用可能是通过促进Caspase-8和Caspase-3的表达来实现.     

白藜芦醇对人乳腺癌MDA-MB-231细胞增殖及凋亡的影响

目的 研究白藜芦醇对人乳腺癌MDA-MB-231细胞增殖和凋亡的影响.方法 MTT法测定细胞增殖;流式细胞术和DAPI染色法检测细胞凋亡.结果 白藜芦醇浓度≥25μmol/L时,对增殖的抑制作用呈时间和浓度依赖性(P<0.01).12.5、25.0、50.0、100.0和200.0μmol/L的白藜芦醇作用12h后,荧光显微镜下可见典型的凋亡形态学改变,流式细胞术检测凋亡率分别为(10.86±0.29)%、(17.36±1.20)%、(28.80±1.34)%、(38.78±1.19)%及(58.96±1.26)%,与对照组凋亡率(3.53±0.25)%比较及组间比较差异有显著性(P<0.01),存在浓度依赖关系.100μmol/L白藜芦醇作用12、24及48h,凋亡率由(38.78±1.19)%增加至(70.32±0.99)%,组间比较差异有显著性(P<0.01),存在时间依赖关系.结论 白藜芦醇以时间和浓度依赖方式抑制人乳腺癌MDA-MB-231细胞的增殖;并能诱导其凋亡.白藜芦醇可能通过诱导凋亡作用抑制MDA-MB-231细胞的增殖.     

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.