癌基因c-erbB-2在膀胱移行细胞癌中的扩增

0　引言　为探讨癌基因 c- erb B- 2的扩增与膀胱移行细胞癌(TCC)的关系 ,我们以斑点杂交的方法对 40例膀胱 TCC标本中 c- erb B- 2的扩增情况进行了检测 ,以期明确 c- erb B- 2扩增与膀胱 TCC病理分级及患者预后的关系 .1　材料和方法　 40例膀胱 TCC患者术后石蜡包埋标本 ,随访 5～ 10 a. 11例正常膀胱粘膜石蜡标本作为对照 . c- erb B-c DNA p CER2 0 4质粒由东京大学提供 ,Bothringer缺口平移 DNA标记试剂盒及 32 P标记 d CTP购于北京福瑞公司 .所有石蜡标本经脱蜡及蛋白酶消化 ,以酚 /氯仿抽提 DNA,乙醇沉淀 .每份样品取…     

Characterization and prediction of IVF cycles generating “slow-cleaving” embryos

Purpose To characterize and predict cycles generating slowcleaving embryos in in vitro fertilization, 86 cycles were retrospectively divided into two groups (slow, n=41, and fast, n=45 according to whether the number of blastomeres per embryo on day 3 was or > than the mean of the distribution, respectively.Results Cycles generating slowcleaving embryos were treated with luteinizing hormonereleasing hormone agonist before ovarian stimulation for a shorter period (12.1±0.5 versus 15.6±1.1 days; P0.01) and had higher immaturity grade of oocyte-corona-cumulus complexes which resulted in embryos (1.6±0.1 vs 1.3±0.1; P0.05) when compared to cycles producing fastcleaving embryos. Both variables entered in a logistic regression model applied in order to predict the probability of a cycle generating slowcleaving embryos (goodness-of-fit chisquare=180.0, degrees of freedom (df)=80, P=0.4786. This model predicted correctly 86.7% (13 of 15) of cycles generating slowcleaving embryos and 83.3% (10 of 12) of cycles producing fastcleaving embryos when the estimated probability of a cycle producing slowcleaving embryos was 0.7 or 0.3, respectively.Conclusion Shorter treatment with hormone-releasing hormone agonist before ovarian stimulation and higher immaturity grade of oocyte-corona-cumulus complexes which result in embryos are predictive characteristics of in vitro fertilization cycles generating slow-cleaving embryos.     

银杏叶提取物改善反复脑缺血再灌注小鼠血液流变学的作用

目的：研究银杏叶提取物（ＥＧＢ）改善反复脑缺血再灌注小鼠血液流这的作用。方法：采用反复脑缺血再注模型鼠,应用毛细管微量热沉法和毛细管微量法分别检测血纤维蛋白原含量和红细胞压积数值,并将结果输入全自动血液流变仪得出血浆粘度、血液粘度、血细胞聚集系数,血栓形成系数及微循环滞留时间（ＭＳＴ）。结果：ＥＢＧ２５￣１００ｍｇ／ｋｇ均可不同程度地降低Ｆｉｂ、ＨＣＴ、降低ηｂ、ηｐ、ηｈ,缩小ＶＡＬ及ＴＷＥＬ,     

广州市2010年登革4型病毒的分离及其E基因进化分析

登革病毒(DEN)E蛋白在病毒与宿主细胞融合和诱导机体产生抗体等过程中发挥重要作用[1].本研究通过对分离株E基因全序列测定,从分子水平确定其型别,并与广州市历年同型DEN流行株及相关国际流行株进行同源性比较,构建系统进化树,追踪其可能输入来源.