miR-431-5p抑制MDM2表达影响白血病细胞增殖、凋亡的机制研究

目的探讨miR-431-5p靶向MDM2对白血病细胞增殖、凋亡的影响。方法 qRT-PCR检测白血病患者、正常人骨髓细胞和白血病细胞HL-60、K562中miR-431-5p的表达。以K562细胞为研究对象,将其随机分为miR-NC组（转染miR-NC）、miR-431-5p组（转染miR-431-5p）、miR-431-5p+pcDNA3.1组（miR-431-5p和pcDNA3.1共转染）和miR-431-5p+pcDNA3.1-MDM2组（miR-431-5p和pcDNA3.1-MDM2共转染）。MTT法检测细胞增殖活力,流式细胞术检测细胞凋亡,Western blot检测MDM2、CyclinD1、P21、Bax和Bcl-2蛋白表达水平。采用双荧光素酶报告基因法和Western blot验证miR-431-5p和MDM2的靶向关系。结果与正常人骨髓细胞相比,白血病患者骨髓细胞和白血病细胞HL-60、K562中miR-431-5p的表达显著下降,差异有统计学意义（P<0.05）。与miR-NC组相比,miR-431-5p组K562细胞MDM2、Cyclin D1和Bcl-2蛋白的表达明显下调,P21和Bax蛋白的表达明显上调,细胞的增殖活力显著减弱,凋亡率显著升高,差异有统计学意义（P<0.05）。与miR-431-5p+pcDNA3.1组比较,miR-431-5p+pcDNA3.1-MDM2组K562细胞MDM2、Cyclin D1和Bcl-2蛋白的表达明显升高,P21和Bax蛋白的表达明显降低,细胞的增殖活力显著升高,凋亡率显著降低,差异有统计学意义（P<0.05）。结论 miR-431-5p通过靶向下调MDM2可抑制白血病细胞增殖,促进白血病细胞凋亡。     

miR-454-3p对鼻咽癌CNE-2细胞上皮-间质转化的调控机制

目的探讨miR-454-3p对鼻咽癌CNE-2细胞上皮-间质转化（EMT）的调控机制。方法收集2017年1月至2018年12月柳州市中医医院就诊的95例鼻咽癌患者的血清和鼻咽癌组织标本及健康体检者30例的血清,采用RT-qPCR检测miR-454-3p和E-盒结合锌指蛋白2（ZEB2）血清水平和mRNA的表达,对鼻咽癌组织中miR-454-3p和ZEB2mRNA的表达进行相关性分析。将CNE-2细胞随机分为Control组、miR-454-3pmimic组、Mimic-NC组、miR-454-3pmimic+ZEB2plasmid组和miR-454-3pmimic+vector组,采用Transwell实验检测细胞侵袭能力,细胞划痕实验检测细胞迁移能力,Westernblot检测ZEB2、E-cadherin、N-cadherin、Vimentin蛋白表达。双荧光素酶实验验证miR-454-3p与ZEB2的靶向关系。结果鼻咽癌患者血清miR-454-3p水平低于健康体检者,差异有统计学意义（P＜0.05）。鼻咽癌Ⅲ、Ⅳ期患者鼻咽癌组织miR-454-3p相对表达水平低于Ⅰ、Ⅱ期患者,ZEB2mRNA相对表达水平则升高,差异均有统计学意义（均P＜0.05）。miR-454-3p与ZEB2mRNA的表达呈负相关（r=-0.734,P＜0.01）;与Mimic-NC组比较,miR-454-3pmimic组ZEB2、N-cadherin、Vimentin表达水平均降低,E-cadherin表达水平升高,侵袭细胞数及迁移率均降低,差异均有统计学意义（均P＜0.05）,过表达ZEB2可逆转miR-454-3pmimie对EMT的抑制作用。双荧光素酶实验显示miR-454-3p可靶向ZEB23''UTR。结论miR-454-3p在鼻咽癌患者血清及癌组织中呈低表达,可通过靶向调控ZEB2的表达水平进而抑制鼻咽癌细胞EMT。     

miR-204-5p对卵巢早衰大鼠卵巢颗粒细胞凋亡的调控机制

【摘要】目的 探讨微小RNA（miR）-204-5p对卵巢早衰（POF）大鼠卵巢颗粒细胞凋亡的影响及调控机制。方法 体外分离大鼠骨髓间充质干细胞（BMSCs）,将含有miR-204-5p基因反义寡核苷酸序列的重组慢病毒载体转入BMSCs,获得稳定转染LV-rno-ASO-miR-204-5p的BMSCs细胞。选取动情周期正常的75只SPF级雌性Wistar大鼠,随机分为对照组、POF组、BMSCs组、shRNA组、shRNA-BMSCs组,每组各15只。除对照组外,均采用腹腔注射顺铂法制备POF模型。shRNA组、BMSCs组及shRNA-BMSCs组分别双侧卵巢注射慢病毒载体、BMSCs细胞及稳定转染慢病毒载体的BMSCs细胞,对照组和POF组注射生理盐水。观察各组动情周期恢复情况,比较各组干预前、干预28 d后血清促卵泡生成素（FSH）、雌二醇（E2）水平,观察卵巢组织形态、卵泡颗粒细胞凋亡率,检测卵巢组织miR-204-5p mRNA及丝裂原活化蛋白激酶（MAPK）、B细胞淋巴瘤-2基因（Bcl-2）、Bcl-2相关X蛋白（Bax）、半胱氨酸蛋白酶-3（Caspase-3）mRNA和蛋白表达。结果 干预后,POF组大鼠动情周期未恢复;BMSCs组、shRNA组及shRNA-BMSCs组动情周期均有所恢复,其中shRNA-BMSCs组动情周期恢复率均高于BMSCs组及shRNA组（P＜0.05）。病理染色显示,BMSCs组、shRNA组及shRNA-BMSCs组始基卵泡、初级卵泡、次级卵泡及窦卵泡数量均多于POF组,但仍少于对照组（P＜0.05）;shRNA-BMSCs组上述各级卵泡数量多于BMSCs组和shRNA组（P＜0.05）。BMSCs组、shRNA组及shRNA-BMSCs组血清FSH水平、卵巢颗粒细胞凋亡率、卵巢组织中miR-204-5p mRNA及MAPK、Bax、Caspase-3 mRNA和蛋白相对表达量均低于POF组,且shRNA-BMSCs组低于BMSCs组和shRNA组,但仍高于对照组（P＜0.05）;BMSCs组、shRNA组及shRNA-BMSCs组血清E2水平及卵巢组织Bcl-2 mRNA和蛋白相对表达量均高于POF组,且shRNA-BMSCs组高于BMSCs组和shRNA组,但仍低于对照组（P＜0.05）。shRNA组与BMSCs组比较,卵巢组织miR-204-5p mRNA相对表达量较低（P＜0.05）,各级卵泡数量、血清FSH、E2水平、卵巢颗粒细胞凋亡率及卵巢组织MAPK、Bcl-2、Bax、Caspase-3 mRNA和蛋白相对表达量差异均无统计学意义（P＞0.05）。结论 下调miR-204-5p表达可增强BMSCs对POF大鼠卵巢结构和功能的改善作用,抑制卵巢颗粒细胞凋亡,可能与下调MAPK、Bcl-2、Bax、Caspase-3基因和蛋白表达有关。     

miR-133过表达对结肠癌细胞SW480凋亡、增殖和裸鼠成瘤的影响

目的:探究miR-133过表达对结肠癌细胞SW480凋亡、增殖和裸鼠成瘤的影响。方法:将miR-133 mimic转染至SW480细胞,将细胞分为3组:对照组、Scramble组和miR-133 mimic组。RT-PCR检测miR-133表达水平;流式细胞仪检测细胞凋亡;Western 印迹检测Bcl-2、Bax、Caspase-3、Caspase-9、c-Myc蛋白表达水平;CCK-8法检测细胞增殖倍数;克隆形成实验检测细胞克隆形成率;裸鼠右侧腋窝处皮下注射SW480细胞悬液建立裸鼠移植瘤模型,检测肿瘤重量,RT-PCR检测肿瘤组织miR-133表达水平,免疫组化检测Caspase-3、Ki67阳性细胞数。结果:与对照组相比,miR-133 mimic组miR-133表达升高（F=136.70,P＜0.05）,细胞凋亡率升高（F=59.995,P＜0.05）,Bax/Bcl-2、cleaved Caspase-3/Caspase-3、cleaved Caspase-9/Caspase-9表达升高（F=726.85、138.76、55.85,均P＜0.05）,c-Myc蛋白表达水平降低（F=88.98,P＜0.05）,细胞活力降低（F=48.50,P＜0.05）,克隆形成率降低（F=42.63,P＜0.05）,肿瘤重量降低（t=1.788,P＜0.05）,肿瘤组织miR-133表达水平升高（t=1.043,P＜0.05）,Caspase-3阳性细胞数升高（t=1.167,P＜0.05）,Ki67阳性细胞数降低（t=1.557,P＜0.05）。结论:miR-133过表达诱导SW480细胞凋亡,抑制SW480细胞增殖和裸鼠肿瘤的形成。     

丙泊酚通过调控miR-574-5p/SOX2表达抑制胃癌AGS细胞增殖、侵袭和迁移

【摘要】 目的 探讨丙泊酚通过调控微小RNA-574-5P(miRNA-574-5P）/性别决定区Y框蛋白（SOX2）对胃癌AGS细胞增殖、侵袭和迁移的影响和分子机制。 方法 以0、5、10和20 μg/mL丙泊酚处理AGS细胞48 h。筛选丙泊酚最佳使用浓度。将转染后的AGS细胞分为对照组、丙泊酚组、丙泊酚+miR-NC组、丙泊酚+miR-574-5p组、丙泊酚+si-con组、丙泊酚+si-SOX2组、丙泊酚+miR-574-5p+pcDNA组、丙泊酚+miR-574-5p+ pcDNA-SOX2组。采用细胞计数（CCK-8）法检测细胞增殖;克隆形成实验检测细胞克隆形成能力;Transwell实验检测细胞侵袭和迁移;实时荧光定量聚合酶链反应（PCR）法检测细胞中微小RNA（miR）-574-5p的表达水平;免疫印迹法检测细胞中SOX2蛋白的表达水平。采用上述方法检测AGS细胞增殖、侵袭、迁移能力。双荧光素酶报告基因实验检测miR-574-5p与SOX2的靶向关系。 结果 选择20 μg/mL丙泊酚浓度进行实验。与0μg/mL比较,5、10、20 μg/mL丙泊酚处理组细胞存活率、克隆形成率、侵袭细胞数和迁移细胞数均明显降低（P＜0.05）,且呈浓度依赖性,miR-574-5P表达水平呈浓度依赖性降低,SOX2呈浓度依赖性升高（P＜0.05）。与对照组比较,丙泊酚组AGS细胞存活率、克隆形成率、迁移和侵袭细胞数以及miR-574-5p表达显著降低（均P＜0.05）,SOX2蛋白表达显著升高（P＜0.05）。与丙泊酚+miR-NC组比较,丙泊酚+miR-574-5p组AGS细胞存活率、克隆形成率、迁移和侵袭细胞数以及miR-574-5p表达显著升高（均P＜0.05）,SOX2蛋白表达显著降低（P＜0.05）。与丙泊酚+si-con组比较,丙泊酚+si-SOX2组AGS细胞存活率、克隆形成率、迁移和侵袭细胞数以及miR-574-5p表达显著升高（均P＜0.05）,SOX2蛋白表达显著降低（P＜0.05）。与丙泊酚+miR-574-5p+pcDNA组比较,丙泊酚+miR-574-5p+ pcDNA-SOX2组AGS细胞存活率、克隆形成率、迁移和侵袭细胞数以及miR-574-5p表达显著降低（均P＜0.05）,SOX2蛋白表达显著升高（P＜0.05）。miR-574-5p直接与SOX2结合。 结论 丙泊酚通过调控miR-574-5p/SOX2表达抑制胃癌AGS细胞增殖、侵袭和迁移。     

苍耳亭通过调控LOXL1-AS1/miR-520d-5p轴对白血病细胞增殖和凋亡的影响

目的 探讨苍耳亭对白血病细胞的抗癌作用及其机制是否与调控长链非编码RNA（lncRNA）类赖氨酰氧化酶1反义RNA1（LOXL1-AS1）和微小RNA（miR）-520d-5p表达有关。方法 按转染细胞分组：对照组、苍耳亭6 μmol/L组、苍耳亭20 μmol/L组、苍耳亭60 μmol/L组、si-NC组、si-LOXL1-AS1组、苍耳亭+pcDNA-LOXL1-AS1组;采用细胞计数试剂盒（CCK-8）法、流式细胞术检测细胞增殖和凋亡。实时定量PCR（RT-qPCR）检测LOXL1-AS1和miR-520d-5p表达;蛋白质印迹法检测B细胞淋巴瘤（Bcl）-2和Bcl相关x蛋白（Bax）蛋白表达。分别转染LOXL1-AS1小干扰RNA、LOXL1-AS1过表达载体至K-562细胞中,通过CCK-8法、流式细胞术、蛋白质印迹法分析干扰LOXL1-AS1表达或过表达LOXL1-AS1联合苍耳亭对K-562细胞增殖、凋亡以及Bcl-2、Bax蛋白表达的影响。双荧光素酶报告实验分析LOXL1-AS1和miR-520d-5p相互作用。结果 苍耳亭处理后K-562细胞增殖抑制率、凋亡率、Bax蛋白表达、miR-520d-5p表达显著升高（均P＜0.05）,Bcl-2蛋白表达、LOXL1-AS1表达显著降低（均P＜0.05）。干扰LOXL1-AS1表达后K-562细胞增殖抑制率、凋亡率、Bax蛋白表达、miR-520d-5p表达显著升高（均P＜0.05）,Bcl-2蛋白表达显著降低（P＜0.05）。过表达LOXL1-AS1明显减弱苍耳亭处理对K-562细胞细胞增殖、凋亡以及Bcl-2和Bax蛋白表达的影响。LOXL1-AS1与miR-520d-5p直接结合。结论 苍耳亭可抑制白血病细胞增殖,诱导其凋亡,其机制可能与抑制LOXL1-AS1/miR-520d-5p轴有关。     

EGFR通过IL-6/STAT3信号通路对肺癌细胞增殖及凋亡的影响

目的 探究表皮生长因子受体（EGFR）对肺癌细胞增殖、凋亡的影响及相关机制。方法 以人正常支气管上皮细胞16HBE及肺癌细胞A549、H1299、MSTO-211H为研究对象,qRT-PCR、western blot分别检测细胞中EGFR mRNA、蛋白水平。将MSTO-211H细胞分为NG组、pcDNA3.1组、pcDNA3.1-EGFR组、pcDNA3.1-EGFR+anti-IL-6组、pcDNA3.1-EGFR+JSI-124组;qRT-PCR检测EGFR mRNA水平;CCK-8法及平板克隆实验、Hoechst33342染色法及流式细胞仪分别检测细胞增殖、凋亡情况;western blot检测EGFR、细胞周期素D1（CyclinD1）、凋亡相关蛋白B淋巴细胞瘤-2（Bcl-2）、Bcl-2相关X蛋白（Bax）及白介素-6/Janus蛋白酪氨酸激酶/信号转导子与转录激活子3（IL-6/JAK/STAT）通路相关蛋白表达。结果 与16HBE细胞比较,A549、H1299、MSTO-211H中EGFR mRNA及蛋白表达水平显著升高,且MSTO-211H细胞中EGFR mRNA及蛋白表达水平最低,因此选择MSTO-211H细胞进行后续实验;与NG组、pcDNA3.1组比较,pcDNA3.1-EGFR组MSTO-211H细胞凋亡活动明显减弱,且细胞增殖抑制率、凋亡率、Bax蛋白表达显著降低（P＜0.05）,克隆形成率、EGFR、CyclinD1、Bcl-2、IL-6、p-JAK/JAK、p-STAT/STAT蛋白表达显著升高（P＜0.05）;与pcDNA3.1-EGFR组比较,pcDNA3.1-EGFR+anti-IL-6组、pcDNA3.1-EGFR+JSI-124组MSTO-211H细胞凋亡活动明显增强,细胞增殖抑制率、凋亡率、Bax蛋白表达显著升高（P＜0.05）,克隆形成率、CyclinD1、Bcl-2、IL-6、p-JAK/JAK、p-STAT/STAT蛋白表达显著降低（P＜0.05）。结论 过表达EGFR可促进MSTO-211H细胞增殖并抑制细胞凋亡,可能是通过促进IL-6/JAK/STAT信号通路活化实现的。     

重楼皂苷在 miR-125a-5p 靶向 调控GAB2诱导乳腺癌细胞增殖 和凋亡中的作用及机制研究

目的 探讨重楼皂苷（RPS）在 miR-125a-5p 靶向调控 Grb2 相关结合蛋白 2（GAB2）诱导乳腺癌细胞增殖和凋亡 中的作用及机制。 方法 取人乳腺癌细胞系 MCF-7 和人正常乳腺上皮细胞系 MCF-10A,采用 qRT-PCR、Western blot 法分别 检测并比较两者 miR-125a-5p、GAB2 表达水平。再将 MCF-7 细胞按随机数字表法分成 6 组：RPS 0 μg/mL 组、RPS 80 μg/mL 组、RPS 80 μg/mL+阴性抗体组、RPS 80 μg/mL+anti-miR-125a-5p 组、RPS 80 μg/mL+anti-miR-125a-5p+阴性干扰组和 RPS 80 μg/mL+ anti-miR-125a-5p+si-GAB2 组,每组设 3 个复孔;培养 48 h 后检测并比较 miR-125a-5p、GAB2、B 淋巴细胞 瘤-2（Bcl-2）、Bcl-2 相关 X 蛋白（Bax）表达水平以及细胞增殖率、细胞凋亡率。将 GAB2 与空白质粒和过表达 miR-125a-5p 质 粒共转染到 MCF-7 细胞中,采用荧光素酶 Promega 检测法检测 miR-125a-5p 与 GAB2 的靶向作用。 结果 与 MCF-10A 细胞 比较,MCF-7 细胞中 miR-125a-5p 表达水平较低（P＜0.05）,GAB2 表达水平较高（P＜0.05）。与 RPS 0 μg/mL 组比较,RPS 80 μg/mL 组和 RPS 80 μg/mL+阴性抗体组 miR-125a-5p、Bax 表达水平和细胞凋亡率均明显升高（均 P＜0.05）,细胞增殖率和 Bcl-2 表达水平均明显降低（均 P＜0.05）;RPS 80 μg/mL 组和 RPS 80 μg/mL+ anti-miR-125a-5p+阴性干扰组 GAB2 表达水平 均明显降低（均 P＜0.05）。与 RPS 80 μg/mL 组、RPS 80 μg/mL+阴性抗体组比较,RPS 80 μg/mL+anti-miR-125a-5p 组 miR- 125a-5p 表达水平均明显降低（均 P＜0.05）;RPS 80 μg/mL+anti-miR-125a-5p 组和 RPS 80 μg/mL+ anti-miR-125a-5p+阴 性干扰组细胞增殖率和 Bcl-2 表达水平均明显升高（均 P＜0.05）,细胞凋亡率和 Bax 表达水平均明显降低（均 P＜0.05）。与 RPS 80 μg/mL 组、RPS 80 μg/mL+ anti-miR-125a-5p+阴性干扰组比较,RPS 80 μg/mL+anti-miR-125a-5p+si-GAB2 组 GAB2表达水平均明显降低（均P＜0.05）。与RPS 80 μg/mL+anti-miR-125a-5p组、RPS 80 μg/mL+ anti-miR-125a-5p+阴性干 扰组比较,RPS 80 μg/mL+ anti-miR-125a-5p+si-GAB2 组细胞增殖率和 Bcl-2 表达水平均明显降低（均 P＜0.05）,细胞凋亡率 和 Bax 表达水平均明显升高（均 P＜0.05）。GAB2 与 miR-125a-5p 的结合位点为 CAGGGA,GAB2 的突变位点为 AGUCCC; miR-125a-5p与GAB2野生型结合能明显降低荧光活性比（P＜0.05）,但与GAB2突变型结合不影响荧光活性比（P＞0.05）。 结 论 RPS 能够介导 miR-125a-5p/ GAB2 轴发挥抗肿瘤活性,具体机制可能与 miR-125a-5p 发挥抑癌效应来负向调控 GAB2 蛋 白表达,进而影响乳腺癌细胞的增殖和凋亡能力有关。     

呼吸道合胞病毒通过调控miR-409-3p/SIRT1通路促进支气管上皮细胞凋亡与炎症因子表达

目的 呼吸道合胞病毒(respiratory syncytial virus,RSV)对人支气管上皮细胞(human bronchial epithelial cells,HBECs)凋亡和炎性因子表达的影响及可能机制.方法 体外培养HBECs,分别转染miR-409-3p抑制剂、SIRT1过表达载体或共转染miR-409-3p抑制剂与SIRT1小干扰RNA后,采用RSV感染进行转染,然后RT-qPCR法检测细胞中miR-409-3p和SIRT1 mRNA表达水平,CCK-8法检测细胞增殖,流式细胞术检测细胞凋亡率,Western Blot检测细胞中Ki-67、p21、Bcl-2和Bax蛋白表达,试剂盒法检测细胞培养上清液中IL-6和TNF-α表达水平.双荧光素酶报告基因实验验证SIRT1和miR-409-3p调控关系.结果 RSV感染促进HBECs细胞中miR-409-3p的表达(P＜0.05),而抑制SIRT1表达(P＜0.05),降低HBECs细胞增殖活性及细胞中Ki-67和Bcl2的蛋白表达(P＜0.05),促进HBECs凋亡及细胞中p21和Bax的蛋白及IL-6和TNF-α表达(P＜0.05).沉默miR-409-3p或过表达SIRT1可提高RSV感染的HBECs增殖活性及细胞中Ki-67和Bcl2的蛋白表达(P＜0.05),而抑制细胞凋亡率、p21和Bax的蛋白及IL-6和TNF-α表达(P＜0.05).miR-409-3p靶向负调控SIRT1表达.沉默SIRT1逆转了沉默miR-409-3p对RSV感染的HBECs增殖、凋亡及炎性因子IL-6和TNF-α表达的影响(P＜0.05).结论 呼吸道合胞病毒通过调控miR-409-3p/SIRT1通路促进支气管上皮细胞凋亡与炎症因子表达.     

IFN-α调控miR-214-5p/MFGE8通路对人脑血管外膜成纤维细胞增殖、凋亡的影响

目的 探讨干扰素α(IFN-α)调控miR-214-5p/乳脂肪球表皮生长因子8(MFGE8)通路对人脑血管外膜成纤维细胞(HBVAFs)增殖、凋亡的影响。方法 将HBVAFs细胞分为NC组、IFN-α组、IFN-α+ anti-miR-con组、IFN-α+ anti-miR-214-5p组、IFN-α+ pcDNA组、IFN-α+ pcDNA-MFGE8组、IFN-α+ anti-miR-214-5p+ si-con组和IFN-α+ anti-miR-214-5p+ si-MFGE8组。实时荧光定量PCR(qRT-PCR)检测miR-214-5p和MFGE8 mRNA的表达;四甲基偶氮唑蓝(MTT)法检测细胞活力;流式细胞术检测细胞凋亡;蛋白质印记(Western blot)法检测MFGE8、活化的半胱氨酸天冬氨酸蛋白酶3(Cleaved caspase-3)、B细胞淋巴瘤/白血病-2(Bcl-2)和Bcl-2相关X蛋白(Bax)的表达水平。双荧光素酶报告基因实验和Western blot法验证miR-214-5p和MFGE8的靶向调控关系。结果 与NC组比较,IFN-α组HBVAFs细胞miR-214-5p的表达显著升高,MFGE8和Bcl-2的表达显著降低,Cleaved caspase-3和Bax的表达显著升高,细胞活力显著降低,细胞凋亡率显著升高(P <0.05)。与IFN-α+anti-miR-con组比较,IFN-α+anti-miR-214-5p组HBVAFs细胞miR-214-5p、Cleaved caspase-3和Bax的表达显著降低,Bcl-2表达显著升高,细胞活力显著降低,细胞凋亡率显著升高(P<0.05)。miR-214-5p靶向负性调控MFGE8表达。与IFN-α+pcDNA组比较,IFN-α+pcDNA-MFGE8组HBVAFs细胞Cleaved caspase-3和Bax的表达显著降低,MFGE8和Bcl-2表达显著升高,细胞活力显著降低,细胞凋亡率显著升高(P<0.05)。与IFN-α+anti-miR-214-5p+si-con组比较,IFN-α+anti-miR-214-5p+si-MFGE8组HBVAFs细胞Cleaved caspase-3和Bax的表达显著升高,MFGE8和Bcl-2表达显著降低,细胞活力显著升高,细胞凋亡率显著降低(P<0.05)。结论IFN-α通过调控miR-214-5p/MFGE8通路抑制人脑血管外膜成纤维细胞增殖并促进细胞凋亡。     

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.