科创中国

Objective To detect the cell viability and the expressions of stem cell surface markers after chemotherapeutic drug treatment.Methods We observed the cytotoxic effects of three chemotherapeutic agents[epirubicin(Epi),fluorouracil(5-FU)and cyclophosphamide(Cyc)]in three cell lines,and the cell viabilities after removed these chemotherapeutic agents.Expressions of stem cell surface markers CD44,CD24,CD90,CD14 and aldehyde dehydrogenase1(ALDH1)in breast cancer cells were analyzed by real-time PCR.The post hoc analysis(Tukey's tests)in conjunction with one-way ANOVA was used for statistical analysis.Results The initial cytotoxic efficacy was most notable.After the treatment of the same therapeutic agents,cell viability was decreased by 64.8%35.14%,32.25%in BT-483 cells,66.4%,22.94%and 45.88%in MDA-MB-231 cells,97.1%,99.5%and 76.4%in MCF cells.The difference was significant compared with that before treatment(P=0.000).However,the inhibitory effects were diminished after chemotherapeutic agent withdrawal.Cell viabilities were increased to 167.9%,212.04%and 188.66%in MDA-MB-231 cells at48 h after withdrawal.At 72 h after withdrawal,cell viability was increased with a significant difference in three cell lines(all P values=0.000).Expressions of CD44 and ALDH1 were most prevalent for MDA-MB-231,BT-483 and MCF-7 cells.ALDH1 mRNA level was significant higher in BT-483(HER-2 overexpression cell line)than MDA-MB-231(triple negative cell line)(P=0.012).CD14 mRNA level in MCF-7 cells were significantly lower than that in MDA-MB-231 and BT-483(P=0.003,0.001).BT-483 showed significantly higher level of CD44 than MDA-MB-231 and MCF-7 cell line(P=0.013,0.020),and no significant difference was detected between MDA-MB-231 and MCF-7 breast cancer cells(P=0.955).CD90 mRNA expressions were detected in MDA-MB-231 cells and MCF-7 cells,but not in BT-483 cells.Conclusion Some malignant cells could survive in vitro and begin to proliferate again between cycles of chemotherapy.

目的 研究艾滋病(AIDS)患者高效抗反转录病毒治疗(HAART)后对血脂水平的影响.方法 回顾性调查2005年6月~2011年5月在我科门诊应用高效抗反转录病毒治疗的HIV/AIDS患者100例,平均抗病毒治疗时间(40.78±20.09)个月,HAART方案分别为AZT+ 3TC+ NVP、AZT+ 3TC+ EFV、D4T+ 3TC+ NVP和D4T+ 3TC+ EFV4种,其中D4T+ 3TC+ NVP方案组中体重>60 kg者,D4T的剂量为每次40 mg,每日2次;体重<60 kg者,D4T的剂量为每次30 mg,每日2次.对4组患者治疗前后CD4淋巴细胞计数、空腹血脂(包括总胆固醇、三酰甘油、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇)进行比较.结果 HAART后,CD4淋巴细胞计数均升高,总胆固醇、三酰甘油上升,高密度脂蛋白、低密度脂蛋白正常,AZT方案组与D4T方案组比较差异有统计学意义(P<0.05);其中D4T +3TC+ NVP方案组中,体重>60kg、D4T的剂量为每次40 mg与体重<60 kg、D4T的剂量为每次30 mg比较差异有统计学意义(P<0.05);静脉吸毒与性传播所致艾滋病感染,对血脂无明显影响.结论 HAART治疗对5组患者均有效,以D4T为主的HAART治疗方案可引起血脂代谢异常.

目的 分析肝小静脉闭塞病的临床特点、影像表现和诊治经验.方法 回顾性分析2005年1月~2011年1月我院收治的5例肝小静脉闭塞病患者的临床资料.结果 根据临床及病理学资料,将肝小静脉闭塞病分为急性期(1例)、亚急性期(1例)和慢性期(3例).CT平扫检查均发现肝脏肿大,肝实质密度降低.彩色B超检查均发现肝静脉变细,血流变缓;4例患者存在腹水.行门-体分流术3例,其中好转2例,死亡1例.行内科保守治疗2例,其中1例治愈,1例好转.结论 肝小静脉闭塞病临床表现以肝脏肿大和腹水为特征.影像学检查对肝小静脉闭塞病诊断有重要价值.急性期患者宜采取内科保守治疗,若出现门脉高压症状时,应行门-体分流术治疗.

目的观察临床应用克霉唑、氟康唑联合用药治疗复发性念珠菌性阴道炎的疗效.方法选择2009年2月至2010年11月收治的210例复发性念珠菌性阴道炎患者,并随机分为克霉唑组(A组)、氟康唑组(B组)和克霉唑、氟康唑联合治疗(c组)3组,每组各70例.A组患者给予克霉唑阴道片,每晚睡前阴道深部放药一粒,3d后再放1粒,连放2次;B组患者给予口服氟康唑,顿服,7d为1个治疗疗程;C组患者同时给予克霉唑和氟康唑两种药物.结果A组和B组患者均有一定的疗效,但是C组治疗效果更优于A、B两组且差异显著(P〈0.05).患者出院后回访治疗后的复发率,C组也明显低于A组和B组.3组中共有14例患者服药后出现腹泻,恶心及呕吐症状,不过症状较轻微,未采取给药措施2d后均自行痊愈.结论对于复发性念珠菌性阴道炎应用克霉唑、氟康唑联合治疗,不但疗效确切而且复发率低.

为了降低药物开发后期的失败率,指导侯筛化合物库的设计,药物化学家提出了许多基于化学信息学或计算化学的"成药性"理论指标,这些预测方法日益成熟,取得了广泛应用.本文综述了现有的化合物成药性预测方法的研究进展,包括类药性、类先导性、类天然产物、类代谢物以及生物相关性等,对比了各种成药性预测方法的特征,分析了各种预测方法的优点及其在组合化合物库的设计和优化中的作用,指出了这些方法的不足和局限性.最后,对化合物的成药性预测的应用前景和发展趋势进行了展望.