抑制LINC00667表达对类风湿关节炎成纤维样滑膜细胞增殖、迁移、侵袭的影响

目的 探究长链非编码RNA（LncRNA）LINC00667对类风湿关节炎成纤维样滑膜细胞（RA-FLS）增殖、迁移、侵袭的影响及其机制。方法 复制类风湿关节炎（RA）模型大鼠,SPF级Wistar大鼠分离踝关节滑膜组织,用实时荧光定量聚合酶链反应（qRT-PCR）检测RA-FLS中LINC00667和miR-19a-3p的表达。在RA-FLS中分别转染si-NC（si-NC组）、si-LINC00667（si-LINC00667组）、miR-NC（miR-NC组）、miR-19a-3p模拟物（miR-19a-3p组）、si-LINC00667与anti-miR-NC（si-LINC00667+ anti-miR-NC组）、si-LINC00667与anti-miR-19a-3p（si-LINC00667+ anti-miR-19a-3p组）。CCK-8法检测各组转染后RA-FLS的增殖抑制率。Transwell法检测RA-FLS迁移、侵袭。Western blotting检测E钙黏蛋白（E-cadherin）、N钙黏蛋白（N-cadherin）表达。双萤光素酶报告验证LINC00667和miR-19a-3p的靶向关系。结果 RA模型组滑膜组织中LINC00667表达量约为正常组的270%,miR-19a-3p表达量约为正常组的36%（P <0.05）。转染成功后,si-LINC00667组RA-FLS的增殖抑制率、E-cadherin蛋白相对表达量高于si-NC组（P <0.05）,si-LINC00667组迁移、侵袭细胞数、N-cadherin蛋白相对表达量低于si-NC组（P <0.05）。LINC00667靶向miR-19a-3p,miR-19a-3p组RA-FLS的增殖抑制率、E-cadherin蛋白相对表达量高于miR-NC组（P <0.05）,miR-19a-3p组迁移、侵袭细胞数、N-cadherin蛋白相对表达量低于miR-NC组（P <0.05）。si-LINC00667+ anti-miR-19a-3p组RA-FLS的增殖抑制率、E-cadherin蛋白相对表达量低于si-LINC00667+ anti-miR-NC组（P <0.05）,si-LINC00667+ anti-miR-19a-3p组迁移、侵袭细胞数、N-cadherin蛋白相对表达量高于si-LINC00667+ anti-miR-NC组（P <0.05）。结论 抑制miR-19a-3p通过靶向LINC00667,抑制RA-FLS的增殖、迁移、侵袭,LINC00667或可用作诊断和治疗RA的靶点     

MicroRNA-219a-5p和AFAP1L2对胰腺癌细胞的作用研究

目的 探讨microRNA-219a-5p（miR-219a-5p）和肌动蛋白丝相关蛋白1相似蛋白2（AFAP1L2）对胰腺癌细胞的作用。方法 分别采用实时荧光定量聚合酶链反应（qRT-PCR）和Western blotting法检测胰腺癌细胞株（PANC-1、BXPC-3、SW1990、Capan-1）及正常胰腺导管上皮细胞（HPDE）miR-219a-5p、AFAP1L2的表达，采用siRNA及过表达质粒下调或上调AFAP1L2表达，CCK-8法观察胰腺癌细胞株增殖变化。采用mimics或inhibitor上调或下调miR-219a-5p表达，CCK-8法观察胰腺癌细胞株增殖变化。流式细胞术检测不同干预条件下细胞凋亡和细胞周期。生物信息学预测两者可能具有靶向调控关系。qRT-PCR和Western blotting法检测AFAP1L2 mRNA及蛋白表达，荧光素酶实验观察二者碱基配对关系，进一步验证miR-219a-5p对AFAP1L2具有靶向调控作用。结果 与HPDE细胞比较，胰腺癌细胞株中miR-219a-5p表达较低（P <0.05）。AFAP1L2 mRNA及蛋白在胰腺癌细胞株中的表达高于在HPDE细胞中的表达（P <0.05）。Capan-1或SW1990细胞培养48 h后，与空白对照组（NC组）比较，pCMV-EGFP-AFAP1L2组光密度（OD）值升高（P <0.05），siAFAP1L2组OD值下降（P <0.05），AFAP1L2对胰腺癌细胞增殖具有正向调控作用。Capan-1及SW1990细胞培养48 h后，与miR-NC组比较，miR-219a-5p mimics组OD值下降（P <0.05），miR-219a-5p inhibitor组OD值升高（P <0.05），miR-219a-5p表达对胰腺癌细胞增殖具有负向调控作用；上调miR-219a-5p表达，可诱导细胞S期阻滞，导致细胞凋亡增加。miR-219a-5p负向调控AFAP1L2表达；荧光素酶实验显示，miR-219a-5p与AFAP1L2的3''-URT互补结合，miR-219a-5p与AFAP1L2存在靶向调控关系。结论 miR-219a-5p通过靶向调控AFAP1L2表达负向介导胰腺癌细胞增殖及凋亡。     

SIRT3/FOXO3通路在肺癌A549细胞放疗抵抗中的作用机制研究

目的 探讨沉默信息调节因子3（SIRT3）/叉头转录因子O3（FOXO3）通路在肺癌A549细胞放疗抵抗中的作用。方法 体外培养肺癌A549细胞，设置对照组（A549细胞）、放疗组（A549细胞+X射线照射）、SIRT3抑制剂（3-TYP）组（A549细胞+50 μmol/L 3-TYP）、X射线+3-TYP组（A549细胞+X射线照射+50 μmol/L 3-TYP）。采用CCK-8法检测各组A549细胞增殖情况；流式细胞分析仪检测各组A549细胞凋亡情况和细胞周期分布；Western blotting检测A549细胞中SIRT3、FOXO3、Bcl-2、Bax蛋白相对表达量。结果 各组A549细胞培养24 h、48 h、72 h的OD值比较，经重复测量设计的方差分析：①不同时间点的A549细胞OD值比较，差异有统计学意义（P <0.05）；②不同组间的A549细胞OD值比较，差异有统计学意义（P <0.05）；③各组A549细胞OD值变化趋势比较，差异无统计学意义（P >0.05）。放疗组、X射线+3-TYP组A549细胞凋亡率较对照组升高（P <0.05），3-TYP组较对照组降低（P <0.05），3-TYP组、X射线+3-TYP组较放疗组降低（P <0.05），X射线+3-TYP组较3-TYP组升高（P <0.05）。放疗组、X射线+3-TYP组G0/G1期A549细胞较对照组增加（P <0.05），S、G2/M期A549细胞较对照组减少（P <0.05）；3-TYP组G0/G1期A549细胞较对照组降低（P <0.05），S、G2/M期A549细胞较对照组增加（P <0.05）；3-TYP组、X射线+3-TYP组G0/G1期A549细胞较放疗组减少（P <0.05），S、G2/M期A549细胞较放疗组增加（P <0.05）；X射线+3-TYP组G0/G1期A549细胞较3-TYP组增加（P <0.05），S、G2/M期A549细胞较3-TYP组减少（P <0.05）。放疗组、X射线+3-TYP组A549细胞SIRT3、FOXO3、Bax蛋白相对表达量较对照组升高（P <0.05），Bcl-2蛋白相对表达量较对照组降低（P <0.05）；3-TYP组A549细胞SIRT3、FOXO3、Bax蛋白相对表达量较对照组降低（P <0.05），Bcl-2蛋白相对表达量较对照组升高（P <0.05）；3-TYP组、X射线+3-TYP组A549细胞SIRT3、FOXO3、Bax蛋白相对表达量较放疗组降低（P <0.05），Bcl-2蛋白相对表达量较放疗组升高（P <0.05）；X射线+3-TYP组A549细胞中SIRT3、FOXO3、Bax蛋白相对表达量较3-TYP组升高（P <0.05），Bcl-2蛋白相对表达量较3-TYP组降低（P <0.05）。结论 肺癌A549细胞发生放疗抵抗可能与SIRT3/FOXO3通路受抑制有关。     

参斛汤对前列腺癌患者术后病灶及血清microRNA-301a-3p水平的影响

目的 探讨参斛汤对前列腺癌术后病灶进展及血清microRNA-301a-3p（miRNA-301a-3p）水平的影响。方法 选取2020年2月—2021年3月就诊于郑州大学第一附属医院的95例前列腺癌患者作为研究对象，按随机数表法分为对照组（47例）和研究组（48例）。患者均接受经尿道前列腺癌根治术，对照组术后接受常规化学治疗，研究组在对照组基础上增加参斛汤辅助治疗。比较两组患者术后病灶进展情况、血清学指标［前列腺特异性抗原（PSA）、游离前列腺特异性抗原（f-PSA）、游离前列腺特异抗原百分率（FPSAR）、血清肿瘤相关物质（TAM）］、免疫功能、不良反应等。结果 研究组局部病灶进展时间、远处转移时间较对照组长（P <0.05）。两组患者治疗前血清PSA、FPSAR、TAM、miR-301a-3p表达水平比较，差异无统计学意义（P >0.05），研究组FPSAR高于对照组（P <0.05），PSA、TAM、miR-301a-3p低于对照组（P <0.05）。两组患者治疗前CD3⁺、CD4⁺、CD8⁺、CD4⁺/CD8⁺水平比较，差异无统计学意义（P >0.05），研究组CD3⁺、CD4⁺、CD4⁺/CD8⁺较对照组高（P <0.05），CD8⁺较对照组低（P <0.05）。两组患者不良反应总发生率比较，差异无统计学意义（P >0.05）。结论 参斛汤用于前列腺癌术后辅助治疗可有效抑制病灶进展，提高患者免疫功能，抑制miR-301a-3p表达，但在减少术后化学治疗不良反应方面未见明显优势。     

LncRNA FEZF1-AS1调控特发性肺间质纤维化的机制研究

目的 探讨FEZ家族锌指1-反义RNA 1（LncRNA FEZF1-AS1）对肺间质纤维化细胞增殖、迁移、侵袭能力及上皮-间充质相互作用（EMT）的影响及其作用机制。方法 将转化生长因子-β₁（TGF-β₁）作用于A549细胞,诱导肺间质纤维化细胞模型,将其分为空白对照组（A549细胞组）和模型组。Western blotting检测细胞E-钙黏蛋白（E-cadherin）、N-钙黏蛋白（N-cadherin）及波形蛋白（Vimentin）表达,观察模型复制是否成功;实时荧光定量聚合酶链反应（qRT-PCR）检测细胞LncRNA FEZF1-AS1和miR-200c-3p基因表达。根据实验目的和转染质粒不同,将A549细胞分为空白对照组（Blank组）、TGF-β₁ + Si LncRNA FEZF1-AS1 NC组、TGF-β₁ + Si LncRNA FEZF1-AS1组。CCK-8法检测细胞增殖能力;细胞划痕实验检测细胞迁移能力;Transwell检测细胞侵袭能力。Western blotting检测细胞E-cadherin、N-cadherin及Vimentin蛋白表达;qRT-PCR检测细胞LncRNA FEZF1-AS1和miR-200c-3p基因表达。结果 模型组E-cadherin蛋白相对表达量较空白对照组降低（P <0.05）,N-cadherin及Vimentin蛋白相对表达量较空白对照组升高（P <0.05）;模型组LncRNA FEZF1-AS1 基因相对表达量较空白对照组升高（P <0.05）,miR-200c-3p 基因相对表达量较空白对照组降低（P <0.05）。与Blank组比较,TGF-β₁ + Si LncRNA FEZF1-AS1 NC组细胞增殖、迁移、侵袭能力升高（P <0.05）;与TGF-β₁ + Si LncRNA FEZF1-AS1 NC组比较,TGF-β₁ + Si LncRNA FEZF1-AS1组细胞增殖、迁移、侵袭能力降低（P <0.05）。与TGF-β₁ + Si LncRNA FEZF1-AS1 NC组比较,TGF-β₁ + Si LncRNA FEZF1-AS1组LncRNA FEZF1-AS1基因相对表达量及N-cadherin、Vimentin蛋白相对表达量降低（P <0.05）,E-cadherin蛋白相对表达量升高（P <0.05）;与TGF-β₁ + Si LncRNA FEZF1-AS1 NC组比较,TGF-β₁ + Si LncRNA FEZF1-AS1组和Blank组miR-200c-3p 基因相对表达量升高（P <0.05）。结论 LncRNA FEZF1-AS1通过抑制miR-200c-3p促进肺间质纤维化细胞增殖、迁移、侵袭及EMT过程。     

糖尿病性视网膜病变患者血清microRNA-20a-5p、VEGF水平变化及其临床意义

目的 探讨糖尿病性视网膜病变（DR）患者血清microRNA-20a-5p（miR-20a-5p）、血管内皮生长因子（VEGF）水平变化及其临床意义。方法 选取遵义市第一人民医院眼科2018年1月—2020年12月收治的82例DR患者为DR组,根据DR严重程度分为增殖型糖尿病性视网膜病变（PDR）组（n =27）和非增殖型糖尿病性视网膜病变（NPDR）组（n =55）。选取同期单纯T2DM患者为T2DM组,42例体检健康者为对照组。采用实时荧光定量聚合酶链反应（qRT-PCR）检测各组血清miR-20a-5p mRNA相对表达量;采用酶联免疫吸附试验（ELISA）检测血清VEGF水平;采用葡萄糖氧化酶法测定空腹血糖（FBG）、胶乳凝集反应法测定糖化血红蛋白（HbA1c）水平。Pearson相关性分析DR患者血清miR-20a-5p mRNA相对表达量与VEGF、FBG、HbA1c的相关性,多因素Logistic回归分析血清miR-20a-5p、VEGF与DR发生的关系,ROC曲线分析血清miR-20a-5p、VEGF对DR发生的预测价值。结果 与T2DM组比较,DR组FBG、HbA1c、VEGF水平升高,血清miR-20a-5p mRNA相对表达量降低,与对照组比较,T2DM组FBG、HbA1c、VEGF水平升高,血清miR-20a-5p mRNA相对表达量降低（P <0.05）。与NPDR组比较,PDR组FBG、HbA1c、VEGF水平升高,血清miR-20a-5p mRNA相对表达量降低（P <0.05）。DR患者血清miR-20a-5p mRNA相对表达量与FBG、HbA1c、VEGF水平呈负相关（r =-0611、-0.799和-0.545,均P <0.05）。多因素Logistic回归分析显示,血清miR-20a-5p高水平［O^R=0.254（95% CI：0.154,0.596）］为DR发生的独立保护因素,糖尿病病程长［O^R=2.042（95% CI：1.422,2.933）］、血清HbA1c高水平［O^R=2.307（95% CI：1.101,4.833）］、血清VEGF高水平［O^R=2.570（95% CI：1.584,4.144）］为DR发生的独立危险因素（P <0.05）。ROC曲线显示,血清miR-20a-5p预测DR发生敏感性为97.56%（95% CI：0.915,0.997）、特异性为61.54%（95% CI：0.471,0.748）;血清VEGF敏感性为57.32%（95% CI：0.447,0.683）、特异性为96.15%（95% CI：0.868,0.995）;联合预测敏感性为91.46%（95% CI：0.832,0.965）、特异性为76.92%（95% CI：0.632,0.875）。结论 DR患者血清miR-20a-5p mRNA相对表达量降低,与FBG、HbA1c、VEGF水平密切相关,miR-20a-5p可能通过调控糖代谢和VEGF介导DR发生和发展。     

lncRNA SNHG6通过microRNA-26b-5p对三阴性乳腺癌细胞增殖、迁移、侵袭的作用机制研究

目的 探究lncRNA SNHG6通过microRNA-26b-5p（miR-26b-5p）对三阴性乳腺癌（TNBC）细胞增殖、迁移、侵袭的作用机制。方法 体外培养人TNBC细胞系MDA-MB-231细胞,培养后分组转染。设置对照组（空载质粒转染）,SNHG6敲减组（si-SNHG6慢病毒载体转染）、miR-26b-5p抑制组（空载质粒+miR-26b-5p-inhibitor转染）及共转染组（si-SNHG6慢病毒载体+miR-26b-5p-inhibitor转染）。实时荧光定量聚合酶链反应检测SNHG6及miR-26b-5p的表达,分别进行CCK-8实验、划痕实验及Transwell实验检测MDA-MB-231细胞增殖、迁移及侵袭能力,采用双荧光素酶报告实验检测SNHG6与miR-26b-5p的靶向作用。结果 与对照组比较,SNHG6敲减组SNHG6 mRNA表达下调（P <0.05）,miR-26b-5p mRNA表达上调（P <0.05）;与对照组比较,miR-26b-5p抑制组SNHG6 mRNA表达上调（P <0.05）,miR-26b-5p mRNA表达下调（P <0.05）;与SNHG6敲减组比较,miR-26b-5p抑制组和共转染组SNHG6 mRNA表达上调（P <0.05）,miR-26b-5p mRNA表达下调（P <0.05）;与miR-26b-5p抑制组比较,共转染组SNHG6 mRNA表达下调（P <0.05）,miR-26b-5p mRNA表达上调（P <0.05）。对照组、SNHG6敲减组、miR-26b-5p抑制组、共转染组24 h、48 h、72 h的OD值比较,采用重复测量设计的方差分析,结果 ①不同时间点OD值有差异（F =52.481,P =0.000）。②4组OD值有差异（F =50.336,P =0.000）,与对照组比较,SNHG6敲减组及共转染组24 h、48 h及72 h的OD值降低（P <0.05）,miR-26b-5p抑制组24 h、48 h及72 h的OD值升高（P <0.05）;与SNHG6敲减组比较,miR-26b-5p抑制组和共转染组24 h、48 h及72 h的OD值升高（P <0.05）;与miR-26b-5p抑制组比较,共转染组OD值降低（P <0.05）。③4组OD值变化趋势有差异（F =20.109,P =0.000）。与对照组比较,SNHG6敲减组和共转染组划痕愈合率降低,侵袭细胞数减少（P <0.05）,miR-26b-5p抑制组划痕愈合率升高,侵袭细胞数增加（P <0.05）;与SNHG6敲减组比较,miR-26b-5p抑制组和共转染组划痕愈合率升高,侵袭细胞数增加（P <0.05）;与miR-26b-5p抑制组比较,共转染组划痕愈合率降低,侵袭细胞数减少（P <0.05）。且SNHG6与miR-26b-5p基因序列上存在结合位点。结论 敲减SNHG6通过靶向上调MDA-MB-231细胞中miR-26b-5p的表达,抑制TNBC增殖、迁移及侵袭。     

MicroRNA-137通过Wnt信号通路对宫颈癌细胞增殖、凋亡及裸鼠移植瘤的作用研究

目的 探究microRNA-137（miR-137）通过Wnt信号通路对人宫颈癌细胞HeLa的增殖与凋亡,以及对裸鼠移植瘤的作用。方法 将人宫颈癌细胞HeLa分别转染miR-137-mimic质粒（miR-137组）和空载质粒（NC组）,另设空白组只加入等量转染试剂不做其他处理。待细胞稳定转染后,采用CCK-8法检测细胞活性。采用流式细胞仪检测细胞凋亡。采用实时荧光定量聚合酶链反应（qRT-PCR）检测Wnt、基质金属蛋白酶-7（MMP-7）、分泌型蛋白Dickkopf-1（DKK1）、miR-137 mRNA相对表达量;采用Western blotting检测Wnt、MMP-7、DKK1蛋白的相对表达量。将稳定转染的细胞接种于裸鼠背部,观察裸鼠移植瘤的生长情况,绘制生长曲线并计算抑瘤率。结果 空白组、NC组、miR-137组12 h、24 h、48 h的OD值比较,采用重复测量设计的方差分析,结果 ①不同时间点的OD值有差异（P <0.05）;②3组的OD值有差异（P <0.05）,miR-137组OD值较空白组和NC组低,相对细胞活性较低;③3组OD值的变化趋势有差异（P <0.05）。miR-137组细胞凋亡率高于空白组和NC组（P <0.05）。miR-137组细胞Wnt和MMP-7 mRNA相对表达量较空白组和NC组降低（P <0.05）;miR-137组细胞DKK1和miR-137 mRNA相对表达量较空白组和NC组升高（P <0.05）。miR-137组细胞Wnt、MMP-7蛋白相对表达量较空白组和NC组降低（P <0.05）;miR-137组细胞DKK1蛋白相对表达量较空白组和NC组升高（P <0.05）。NC组裸鼠移植瘤的抑瘤率与miR-137组比较,差异有统计学意义（P <0.05）,miR-137组裸鼠移植瘤的抑瘤率增加。空白组、NC组、miR-137组裸鼠不同时间点的肿瘤体积比较,采用重复测量设计的方差分析,结果 ①不同时间点的肿瘤体积有差异（P <0.05）;②3组的肿瘤体积有差异（P <0.05）,miR-137组与空白组和NC组相比,肿瘤生长缓慢,相对抑瘤效果较好;③3组肿瘤体积的变化趋势有差异（P <0.05）。结论 在人宫颈癌细胞中过表达miR-137可以促进癌细胞凋亡,抑制癌细胞增殖,该作用可能与Wnt及其上下游MMP-7/DKK1信号通路有关。     

妊娠糖尿病患者血清microRNA-21调节Bcl-2/Caspase-9对滋养层细胞生物学行为的影响

目的 探讨妊娠糖尿病（GDM）患者血清microRNA-21（miR-21）表达变化及其对滋养层细胞生物学行为的作用机制。方法 选取2019年1月—2020年10月三亚市妇幼保健院收治的66例GDM孕妇及同期体检且孕周相近的38例健康孕妇作为研究对象。采用实时荧光定量聚合酶链反应（qRT-PCR）检测血清miR-21 mRNA表达水平,microRNA转染JAR细胞系构建Control、miR-21 NC、miR-21、miR-21 inhibitor NC和miR-21 inhibitor组细胞。采用CCK-8法检测细胞活力,Brdu检测细胞增殖,Matrigel侵袭实验检测细胞侵袭,TUNEL法检测细胞凋亡;采用Western blotting检测Bcl-2、Bax、Cleaved-Caspase 9、E-cadherin及Vimentin蛋白表达。结果 研究组患者miR-21 mRNA相对表达量及FPG、HbA1c水平较对照组高（P <0.05）。miR-21组细胞miR-21 mRNA相对表达量高于Control组（P <0.05）,miR-21 inhibitor组细胞 mRNA相对表达量低于Control组（P <0.05）。CCK-8法检测结果显示,miR-21组细胞活力较Control组下调（P <0.05）,miR-21 inhibitor组细胞活力较Control组上升（P <0.05）。miR-21组细胞增殖能力较Control组减弱（P <0.05）,miR-21 inhibitor组细胞增殖能力较Control组增强（P <0.05）。miR-21组细胞凋亡率较Control组升高（P <0.05）,miR-21 inhibitor组细胞凋亡率较Control组降低（P <0.05）。miR-21组的穿膜细胞数低于Control组（P <0.05）,miR-21 inhibitor组的穿膜细胞数高于Control组（P <0.05）。相较于Control组,miR-21组E-cadherin表达上调,Vimentin表达下调（P <0.05）,miR-21 inhibitor组E-cadherin表达下调,Vimentin表达上调（P <0.05）。相较于Control组,miR-21组Cleaved Caspased-9、Bax蛋白相对表达量上升,Bcl-2蛋白相对表达量下降（P <0.05）;miR-21 inhibitor组Caspased-9、Bax蛋白相对表达量下降,Bcl-2蛋白相对表达量上升（P <0.05）。结论 GDM孕妇存在miR-21高表达,miR-21可通过调节Bcl-2/Caspase-9介导对滋养层细胞增殖、侵袭的抑制作用,继而促进细胞凋亡。     

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.