miR-125b和血管内皮生长因子A在肝细胞癌中的表达及两者的相关性

目的:探讨miR-125b与血管内皮生长因子A(vascular endothelial growth factor-A,VEGF-A)在肝细胞肝癌(hepatocellular carcinoma,HCC)中的表达情况及与两者的相关性?方法:利用real-time PCR检测肝癌?癌旁组织?肝癌细胞Huh-7?HepG2以及正常肝细胞L02中miR-125b表达,应用real-time PCR和Western blot分别检测肝癌?癌旁组织中VEGF-A mRNA和蛋白表达?转染miR-125b模拟物(mimic)上调肝癌细胞HepG2中miR-125b表达后,real-time PCR和Western blot检测HepG2细胞中VEGF-A mRNA和蛋白表达?结果:miR-125b 在人肝癌组织中的表达较癌旁组织明显降低(P < 0.05);在肝癌细胞Huh-7?HepG2中的表达较L02明显降低(P < 0.05)?VEGF-A mRNA和蛋白在人肝癌组织中的表达较癌旁组织明显升高(P < 0.05)?miR-125b mimic上调HepG2中miR-125b表达后,转染组VEGF-A mRNA和蛋白表达较空白组和阴性对照组均明显下降(P < 0.05)?结论:miR-125b在肝癌中表达明显下调,而VEGF-A表达上调;低表达的miR-125b丧失对VEGF-A表达的抑制作用可能是肝癌发生的重要机制?     

MiR-26b增强顺铂对宫颈癌细胞株Hela的杀伤活性

目的:研究microRNA-26b(miR-26b)是否能增强顺铂对宫颈癌细胞的杀伤活性及机制。方法:用荧光定量PCR方法检测人正常宫颈上皮细胞系CRL-2614及宫颈癌细胞系Hela、SiHa和C-33a miR-26b的表达水平。MTT法检测顺铂单独治疗及联合miR-26b治疗对宫颈癌细胞系Hela的杀伤活性。利用生物信息学及western blot方法验证miR-26b是否调节Hela细胞Mcl-1的表达。构建Mcl-1真核表达载体,MTT法检测Mcl-1表达载体转染对miR-26b联合顺铂杀伤Hela细胞疗效的影响。结果:宫颈癌细胞系Hela(0.21±0.04)、SiHa(0.42±0.03)和C-33a(0.33±0.03)的miR-26b的相对表达水平显著低于正常宫颈上皮细胞系CRL-2614 (1.00±0.05)。miR-26b联合1mmol/L顺铂治疗组对Hela细胞的杀伤活性(细胞活力抑制率为52.6±6.9)显著高于1mmol/L顺铂单治疗组(细胞活力抑制率为6.7±3.5)。miR-26b转染后,Hela细胞Mcl-1的蛋白表达水平下降。miR-26b联合1mmol/L顺铂在Mcl-1表达载体转染后对Hela细胞的杀伤活性(细胞活力抑制率为19.6±6.7)显著低于未转染Mcl-1表达载体的miR-26b联合1mmol/L顺铂组(细胞活力抑制率为55.7±7.6)。结论:MiR-26b通过靶向于Mcl-1增强顺铂对宫颈癌细胞系Hela的杀伤活性。     

MiR-29b下调肝肿瘤细胞Mcl-1的表达并诱导其发生凋亡

目的:探讨miR-29b(microRNA-29b)的作用靶点及其对肝肿瘤细胞系Huh7的凋亡诱导作用。方法:荧光定量PCR检测正常肝细胞系LO2及肝癌细胞系Huh7的miR-29b和Mcl-1的表达水平。通过生物信息学分析预测Mcl-1基因是否受microRNA调控。将miR-29b模拟物通过Lipofectamine 2000顺时转染Huh7细胞,检测miR-29b对Mcl-1表达水平的影响。MTT法检测miR-29b模拟物转染对Huh7细胞增殖的影响;Annexin V/PI染色法检测miR-29b对Huh7细胞凋亡的影响。结果：肝肿瘤细胞相比于正常肝细胞高表达Mcl-1低表达miR-29b,在肝癌细胞中转染miR-29b可使Mcl-1的表达水平下降,转染miR-29b可抑制Huh7细胞的增殖并诱导其发生凋亡。结论：MiR-29b下调Huh7细胞Mcl-1蛋白的表达并诱导其发生凋亡。     

MicroRNA-216b靶向DCLK1调控卵巢癌HO-8910细胞的增殖迁移和侵袭

目的:探讨MicroRNA-216b(miR-216b)对卵巢癌HO-8910细胞增殖、迁移和侵袭的影响.方法:收集30例卵巢癌患者癌组织和癌旁组织,采用qPCR检测癌组织和癌旁组织miR-216b的表达.采用HO-8910细胞为对照组,转染空载质粒HO-8910细胞为阴性对照组,转染miR-216b mimic的HO...     

MiR-26b增强顺铂对宫颈癌细胞株Hela的杀伤活性研究

目的观察micro RNA-26b(mi R-26b)联合顺铂对宫颈癌细胞的杀伤效果,并探讨其作用机制。方法荧光定量PCR方法检测人正常宫颈上皮细胞系CRL-2614及宫颈癌细胞系Hela、SiHa和C-33a的mi R-26b表达水平。MTT法检测顺铂单独治疗及联合mi R-26b治疗对宫颈癌细胞系Hela的杀伤活性。利用生物信息学及Western blot方法验证mi R-26b是否调节Hela细胞Mcl-1表达。构建Mcl-1真核表达载体,MTT法检测Mcl-1表达载体转染对mi R-26b联合顺铂杀伤Hela细胞疗效的影响。结果宫颈癌细胞系mi R-26b表达水平:Hela细胞为(0.21±0.04),Si Ha细胞为(0.42±0.03),C-33a细胞为(0.33±0.03),显著低于正常宫颈上皮细胞系CRL-2614的(1.00±0.05)(P0.05)。mi R-26b联合1μmol/L顺铂治疗组对Hela细胞的杀伤活性[细胞活力抑制率为(52.6±6.9)%]显著高于1μmol/L顺铂单治疗组[细胞活力抑制率为(6.7±3.5)%]。mi R-26b转染后,Hela细胞Mcl-1蛋白表达水平下降。mi R-26b联合1μmol/L顺铂在Mcl-1表达载体转染后对Hela细胞的杀伤活性[细胞活力抑制率为(19.6±6.7)%]显著低于未转染Mcl-1表达载体的mi R-26b联合1μmol/L顺铂组[细胞活力抑制率为(55.7±7.6)%]。结论 Mi R-26b通过靶向于Mcl-1增强顺铂对宫颈癌细胞系Hela的杀伤活性。     

MicroRNA-218在肝细胞癌中的表达及功能

目的检测MicroRNA-218(miR-218)在肝细胞癌中的表达情况并研究其在肝癌中的功能。方法收集46例肝细胞癌及对应癌旁组织,运用qRT-PCR技术检测miR-218在肝癌及对应癌旁组织中的表达情况;应用miR-218 mimic转染人肝癌细胞系HepG2,MTT和流式细胞术检测转染后细胞活力和凋亡变化,qRT-PCR和Western blot检测miR-218潜在靶点的表达变化。结果 miR-218在肝癌组织中的表达显著低于对应的癌旁组织(P<0.05);miR-218低表达与肿瘤大小(>5 cm)和高TNM分期(Ⅲ+Ⅳ)具有显著相关性(P<0.05);在HepG2细胞中,miR-218抑制细胞增殖和诱导凋亡,并下调Bmi-1和CDK6 mRNA及蛋白表达(P<0.05)。结论 miR-218低表达与肝癌的恶性临床病理特征相关,miR-218可能通过下调Bmi-1和CDK6表达抑制肝癌细胞增殖和促进凋亡。     

Effect of miR-125b on expression of Cbfβ in C3H10T1/2 cells

目的 研究miR-125b对鼠间充质干细胞株C3H10T1/2中核心结合因子-β(core-binding factor beta,Cbfβ)表达的调节作用.方法 将microRNA阴性对照、miR-125b mimic和anti-miR-125b用脂质体转染小鼠间充质干细胞系C3H10T1/2,Western blot及RT-PCR测定细胞中Cbfβ蛋白及mRNA表达;以PicTar数据库预测的Cbfβ3’-非翻译区上miR-125b靶位点附近约30个碱基为基础合成3组插入序列(阳性对照、野生型序列、突变序列),连接到经HindⅢ、SpeⅠ双酶切后的PmiR-report载体质粒上,然后与miRNA阴性对照和miR-125b mimic共同转染293T细胞,双荧光素酶报告基因检测荧光素酶活性.结果 过表达miR-125b抑制Cbfβ蛋白及mRNA表达(P＜0.05),转染anti-miR-125b可促进Cbfβ蛋白及mRNA表达(P＜0.05);miR-125b抑制Cbfβ3’-非翻译区荧光素活性.结论 外源性miR-125b可作用于Cbfβ3’非翻译区从而负性调节C3H10T1/2细胞中Cbfβ的表达.     

miR-200b与miR-200c靶向DNA甲基转移酶对卵巢癌细胞顺铂耐药性的影响

目的探讨miR-200b与miR-200c靶向DNA甲基转移酶1(DNMT1)、DNMT3A和DNMT3B对卵巢癌细胞顺铂耐药性的影响。方法以人卵巢癌细胞株(A2780)、人卵巢癌顺铂耐药细胞株(A2780/DDP)作为研究对象,实时荧光定量PCR(qRT-PCR)检测A2780、A2780/DDP细胞株中miR-200b与miR-200c表达量。耐药细胞株A2780/DDP转染后分为si-miR-200b组、si-miR-200c组、si-NC组,MTT法检测转染后3组细胞IC50值;蛋白印迹免疫法(Western blotting)检测转染后3组细胞DNMT1、DNMT3A和DNMT3B蛋白表达水平;流式细胞术检测转染后细胞凋亡率。结果qRT-PCR结果显示A2780细胞系中miR-200b与miR-200c表达高于A2780/DDP细胞系(P＜0.05)。 si-miR-200b组和si-miR-200c组IC50值、DNMT1、DNMT3A 和DNMT3B 蛋白表达水平低于si-NC组(P＜0.05)。结论miR-200b与miR-200c高表达能抑制DNMT1、DNMT3A和DNMT3B基因表达,从而逆转卵巢癌细胞对顺铂的耐药性。     

MicroRNA-218在肝细胞癌中的表达及功能

目的检测MicroRNA-218（miR-218）在肝细胞癌中的表达情况并研究其在肝癌中的功能。方法收集46例肝细胞癌及对
应癌旁组织,运用qRT-PCR技术检测miR-218 在肝癌及对应癌旁组织中的表达情况;应用miR-218 mimic转染人肝癌细胞系
HepG2,MTT和流式细胞术检测转染后细胞活力和凋亡变化,qRT-PCR和Western blot检测miR-218潜在靶点的表达变化。结
果miR-218在肝癌组织中的表达显著低于对应的癌旁组织（P<0.05）;miR-218低表达与肿瘤大小（>5 cm）和高TNM分期（Ⅲ+
Ⅳ）具有显著相关性（P<0.05）;在HepG2细胞中,miR-218抑制细胞增殖和诱导凋亡,并下调Bmi-1和CDK6 mRNA及蛋白表达
（P<0.05）。结论miR-218低表达与肝癌的恶性临床病理特征相关,miR-218可能通过下调Bmi-1和CDK6表达抑制肝癌细胞增
殖和促进凋亡。
     

m iR-335通过靶向生存素对乳腺癌细胞增殖的调控作用

目的：探讨miR‐335通过靶向生存素对乳腺癌细胞增殖的调控作用。方法（1）选取乳腺癌组织及癌旁正常组织,分别采用RT‐PCR、Western blot检测组织中 miR‐335及生存素蛋白表达。（2）选取乳腺癌细胞系 MCF‐7,分别转染 miR‐335 mimic及mimic对照组,采用RT‐PCR、Western blot检测组织中miR‐335及生存素蛋白表达。（3）选取乳腺癌细胞系MCF‐7,分别将野生型survivin 3′‐UTR质粒（survivin‐wt）和突变型survivin 3′‐UTR质粒（survivin‐Mut）与miR‐335 mimic或模拟物阴性对照（NC）共转染至乳腺癌细胞系MCF‐7,双荧光素酶报告基因检测细胞荧光素酶活性。（4）选取乳腺癌细胞系MCF‐7,分别转染mimic对照组、miR‐335 mimic及miR‐335 mimic＋survivin ,采用四甲基偶氮唑蓝（MTT）法检测各组细胞增殖活性。结果（1）与癌旁组织相比较,乳腺癌组织中miR‐335表达显著降低（P＜0．05）,同时生存素蛋白表达显著增高（P＜0．05）。（2）与转染mimic对照组相比较,转染miR‐335 mimic可使乳腺癌细胞MCF‐7中miR‐335表达上调（P＜0．05）,同时生存素蛋白表达表达下调（P＜0．05）。（3）与转染NC相比较,共转染miR‐335 mimic与survivin‐wt可使MCF‐7荧光素酶活性降低（P＜0．05）,而共转染miR‐335 mimic与survivin‐Mut则MCF‐7荧光素酶活性无显著性变化（P＞0．05）。（4）转染miR‐335mimic后,MCF‐7增殖活性较转染mimic对照组显著降低（P＜0．05）;而转染miR‐335 mimic＋survivin后,MCF‐7增殖活性较单纯转染miR‐335 mimic显著提高（P＜0．05）,但仍显著低于转染mimic对照组（P＜0．05）。结论在乳腺癌组织中miR‐335呈现低表达,生存素呈现高表达;而miR‐335可通过靶向生存素抑制乳腺癌细胞系MCF‐7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.     

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.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.