mir-338-3p对结直肠癌细胞侵袭迁移能力及SMO蛋白表达的影响

目的：探讨微小RNA-338．3p（miR-338-3p）对人结直肠癌细胞侵袭迁移能力及Smoothened（SMO）蛋白表达的影响。方法：应用实时荧光定量PCR（Real—timePCR）检测四种人结肠癌细胞系Lovo、HT-29、HCT116、SW620中miR-338—3p表达状况,并以人脐静脉内皮细胞（HUVEC）作为对照。采取脂质体转染miR-338-3p前体（pre—miR-338．3p）至人结直肠癌细胞系SW620,观察细胞转染前后miR-338—3p的表达变化．Transwell侵袭实验及划痕实验检测转染前后细胞侵袭及迁移能力的改变;以Western—blotting和RT-PCR分析sMO蛋白及mRNA表达状况。结果：检测四种结直肠癌细胞系中miR-338—3p表达水平均较正常对照细胞显著降低,差异具有统计学意义（P〈0．01）;SW620细胞转染pre—miR-338—3p后,miR-338—3p表达水平升高,sMO蛋白表达下降,同时肿瘤细胞侵袭、迁移能力明显增强,与对照组相比差异具有统计学意义（P〈0．01）;但SMOmRNA表达水平在转染前后差异无统计学意义（P〉0．05）。结论：MiR-338—3p可通过抑制结直肠癌细胞系中SMO蛋白表达从而抑制肿瘤细胞侵袭转移。     

人microRNA-338-3p慢病毒表达载体的构建及其靶基因鉴定

目的构建人microRNA-338-3p(has-miR-338-3p)慢病毒表达载体并初步筛选鉴定miR-338-3p的靶基因。方法由miRBase数据库查找获得miR-338-3p前体序列,设计目的基因片段并人工合成;将miR-338-3p前体序列和pLV-THM载体经双酶切后连接,产生pLV-THM-miR-338-3p慢病毒表达载体,双酶切后测序鉴定,筛选阳性克隆;以pLV-THM-miR-338-3p、psPAX2和pMD2.G质粒共转染包装细胞293T,包装产生慢病毒并测定滴度。流式细胞仪筛选建立稳定过表达miR-338-3p的SW-620亚细胞系,利用Real-time RT-PCR检测miR-338-3p表达,Western-blot检测SMO蛋白表达水平,Transwell小室穿透实验检测肿瘤细胞转移能力。结果经双酶切鉴定和测序证实,成功构建了miR-338-3p的慢病毒表达载体pLV-THM-miR-338-3p,倒置荧光显微镜下观察可见包装细胞293T表达绿色荧光。稳定过表达miR-338-3p的SW-620亚细胞系中,miR-338-3p表达水平显著高于阴性对照组和未处理组,SMO蛋白表达水平明显下降,且肿瘤细胞表现出侵袭转移能力的减弱。结论成功构建了has-miR-338-3p慢病毒表达载体和稳定过表达miR-338-3p的SW-620亚细胞系,初步证实miR-338-3p可通过抑制结直肠癌细胞中SMO蛋白表达而抑制肿瘤细胞转移,此为进一步深入研究miR-338-3p在结直肠癌中生物学功能奠定了基础。     

人microRNA-339慢病毒载体的构建及其对结肠癌细胞SW620迁移的影响

目的 构建人microRNA-339(has-miR-339)慢病毒载体,并探讨miR-339-5p/3p对结肠癌细胞SW620迁移能力的影响.方法 由miRBase及NCBI数据库查找获得miR-339前体序列(pre-miR-339)及其侧翼序列,将pre-miR-339和PLVTHM载体经双酶切后连接,产生PLVTHM-pre-miR-339慢病毒载体,并经测序鉴定;以PLVTHM-pre-miR-339、psPAX2和pMD2.G三质粒包装系统共同转染293FT细胞,包装产生慢病毒.流式细胞仪筛选建立稳定过表达pre-miR-339的SW620细胞株,实时荧光定量RT-PCR检测miR-339-5p及miR-339-3p表达.利用细胞划痕实验进行细胞迁移能力检测.结果 成功构建PLVTHM-pre-miR-339慢病毒载体,测序证实所插入基因序列完全正确.倒置荧光显微镜下观察可见转染后的293FT细胞及SW620细胞均表达绿色荧光.在过表达pre-miR-339的SW620亚细胞系中,miR-3396p及miR-339-3p表达水平显著高于空载对照组.划痕实验结果显示:与SW620/PLVTHM-NC组相比,SW620/PLVTHM-pre-miR-339组细胞迁移减缓,划痕较宽.结论 成功构建了PLVTHM-pre-miR-339慢病毒载体和稳定过表达miR-3396p及miR-339-3p的SW620亚细胞系,并证实miR-339-5p/3p可抑制结肠癌细胞SW620的迁移能力.     

microRNA-145调控Catenin-δ 1表达及其与结直肠癌侵袭和转移的相关性

目的探讨microRNA-145(miR-145)调控Catenin-δ1表达与结直肠癌侵袭和转移的关系。方法应用实时荧光定量PCR和显色原位杂交技术检测36例结直肠癌组织和配对正常肠粘膜组织中miR-145的表达;利用LipofectamineTM2000试剂将miR-145模拟物瞬时转染SW620肠癌细胞株,通过RT-PCR和Westernblot分析Catenin-δ1及Fascin-1表达情况;CCK-8试剂盒和Transwell小室检测各组细胞转染后增殖、侵袭和迁移能力的变化。结果miR-145在结直肠癌组织中的表达低于配对正常肠粘膜组织,且表达水平与淋巴结转移相关(P0.05)。体外细胞实验显示,转染miR-145模拟物可显著降低SW620肠癌细胞株Catenin-δ1和Fascin-1蛋白表达水平,并抑制肿瘤细胞增殖、侵袭和迁移。结论miR-145低表达与结直肠癌侵袭和转移相关,其机制可能与调控Catenin-δ1的表达水平相关。     

miR-1229-5p对人结直肠癌细胞SW480增殖、迁移及侵袭的作用研究全文替换

目的：探讨miR-1229-5p对SW480细胞生物学功能的影响和作用机制。方法：采用瞬时转染在SW480细胞中过表达miR-1229-5p,进行细胞克隆、EdU实验、MTT、细胞划痕、Transwell小室迁移及侵袭实验,检测miR-1229-5p mimics组与对照组结直肠癌细胞SW480生物学功能变化。转染过表达miR-1229-5p慢病毒后进行裸鼠皮下成瘤实验,观察miR-1229-5p在体内对细胞增殖能力的影响。通过预测软件TargetScan筛选出X连锁凋亡抑制蛋白相关因子1(XAF1)作为miR-1229-5p的潜在下游靶基因,并检测miR-1229-5p对其蛋白表达的影响。在SW480细胞中转染XAF1过表达质粒,共转染miR-1229-5p后进行回复实验验证miR-1229-5p通过靶向XAF1促进SW480细胞增殖及侵袭。结果：miR-1229-5p mimics组较miR-NC组细胞的增殖、迁移及侵袭能力均提高(P<0.01);miR-1229-5p组瘤体体积高于miR-NC组(P<0.01);miR-1229-5p组对靶基因XAF1表达量低于miR...     

miR-28-5p对结肠癌细胞增殖和迁移的影响

目的 探究miR-28-5p对结肠癌细胞增殖和迁移能力的影响.方法 采用qRT-PCR检测miR-28-5p在正常结肠细胞NCM460与结肠癌细胞HCT116、SW480、SW620中表达量的差异.将HCT116、SW480、SW620各分为三组:对照组,过表达组,沉默组.对照组不予特殊处理,其余两组分别转染miR-2...     

miR-338-5p过表达对胃癌细胞进展及耐药基因表达的影响

目的 探讨miR-338-5p过表达对胃癌细胞侵袭和耐药性的影响。方法 人胃癌细胞MKN-45分为mimics组、mimics-NC组、inhibitor组和inhibitor-NC组，分别转染miR-338-5p-mimics、miR-338-5p-inhibitor及其NC质粒，未行转染的人胃癌细胞MKN-45为对照组。在转染培育24 h后，用CCK-8检测细胞的增殖活性，体外侵袭实验测定细胞的迁移及侵袭能力；使用qRT-PCR检测各组细胞中的耐药基因P-糖蛋白(PGP)、三磷酸腺苷结合盒转运蛋白B2(ATP-binding cassette transporter B2,ABCB2)和G2(ABCG2)相关mRNA的表达；Western blot测定各组细胞中的第10染色体同源丢失性磷酸酶张力蛋白基因(phosphatase and tensin homology deleted on chromosome ten, PTEN)、蛋白激酶B(protein kinase B, AKT)和磷酸化蛋白激酶B(phosphoprotein kinases B, p-AKT)蛋白表达。结...     

MicroRNA-122-5P通过靶向MMP-9抑制TPA诱导的SW480细胞侵袭迁移能力

目的:研究miR-122-5p对TPA诱导人结直肠癌SW480细胞MMP-9表达及侵袭迁移的影响。方法:利用生物信息学筛选结直肠癌差异基因，预测其靶基因miRNA。用TPA(100nM)处理SW480细胞，通过RT-qPCR、Western blot法检测基因和蛋白表达水平；明胶酶谱法检测MMP-9细胞外分泌情况；Transwell检测细胞侵袭和迁移能力。结果:MMP-9在结肠癌组织中高表达，筛选出上游靶基因miR-122-5P;TPA诱导MMP-9 mRNA表达呈时间依赖性上调(P<0.01),诱导miR-122-5p的表达下调(P<0.01);过表达miR-122-5p明显下调TPA诱导的MMP-9 mRNA和蛋白表达(P<0.05),且MMP-9胞外分泌减少，细胞的侵袭、迁移能力显著下降(P<0.01)。结论:miR-122-5p可能通过调控TPA诱导MMP-9的表达，进而抑制结直肠癌SW480细胞侵袭和迁移能力，为克服结直肠癌转移研究提供新的思路。     

miR-203a-3p通过ALOX15途径抑制胃癌细胞铁死亡

目的探讨miR-299-3p靶向调控OCT4B1对结直肠癌细胞SW480增殖、迁移、侵袭及凋亡的作用。 方法将SW480细胞分为NC组、mimics组、inhibitor组,采用MTT法检测细胞活力,结晶紫染色检测单克隆形成数,流式细胞术检测细胞凋亡,Transwell实验检测细胞侵袭能力,qRT-PCR测定细胞miR-299-3p和OCT4B1 mRNA,蛋白免疫印迹法测定OCT4B1蛋白表达。荧光素酶报告基因检测miR-556-3p对SW480细胞OCT4B1活性的调控作用。 结果与NC组比较,miR-299-3p水平、细胞凋亡率mimics组升高,inhibitor组降低,且mimics组高于inhibitor组(P＜0.05);OCT4B1 mRNA和蛋白水平、细胞穿膜数、细胞存活率、单克隆形成数mimics组降低,inhibitor组升高,且mimics组低于inhibitor组(P＜0.05)。 结论miR-299-3p过表达可抑制结直肠癌细胞SW480增殖、迁移、侵袭,促进其凋亡,可能与miR-299-3p抑制OCT4B1 mRNA和蛋白表达有关。     

miRNA-210-3p在大肠癌细胞迁移侵袭中的促进作用及其靶基因的生物信息学分析

目的 探讨miR-210-3p在大肠癌细胞迁移、侵袭中的作用,并利用生物信息学方法预测其靶基因及信号通路。方法 采用dbDEMC和OncomiR数据库分析miR-210-3p在大肠癌中的表达情况,通过荧光定量PCR法验证miR-210-3p在大肠癌细胞系中的表达;通过转染miRNA 模拟物、抑制剂上调和下调大肠癌细胞内miR-210-3p的表达量,Transwell法检测转染后大肠癌细胞的迁移和侵袭能力变化;通过miRDB、TargetScan7.2、starBase和miRPathDB数据库预测miR-210-3p靶基因,利用DAVID数据库进行GO分析及信号通路的富集分析,利用GEPIA数据库分析关键基因在大肠癌组织中的表达。结果dbDEMC和OncomiR数据库显示miR-210-3p在大肠癌组织中高表达,并与肿瘤转移和患者预后相关。荧光定量PCR验证miR-210-3p在高转移性结肠癌细胞系HCT-116、LoVo中的表达量高于中转移性细胞系SW480和低转移性细胞系CL187、HCT-8。过表达miR-210-3p能明显增强SW480细胞迁移和侵袭能力;下调miR-210-3p的表达后,LoVo细胞迁移和侵袭能力则明显减弱。共预测出3035个靶基因,其功能主要富集在细胞迁移、黏附、蛋白质代谢等生物学过程以及癌症通路、HIF、Rap1等信号转导通路,GEPIA数据库验证显示RGMA在临床大肠癌组织中呈显著低表达,可能是miR-210-3p的靶基因。结论 miR-210-3p可促进大肠癌细胞迁移和侵袭能力,有望成为大肠癌治疗的新型生物靶点。     

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.