常见细菌与病毒利用自然机制侵入细胞

据医学空间网2月10日报道，科学家最新的研究成果显示，细菌和病毒是利用一种自然机制侵入人体细胞内部并生长。 美国乔治亚医学院肿瘤病理学专家耶哈一达卡表示，这些病原体在得到活性以后，它们进入细胞内部的方式与细胞表面数百万接受器例行进入细胞的方式相同。     

胰腺癌黏蛋白4基因修饰的树突状细胞疫苗构建及对胰腺癌细胞的免疫效应

Objective To obtain the dendritic cells ( DC)-based vaccine modified by adenovirus containing MUC4 gene , and evaluate the anti-tumor efficacy of DC vaccine to pancreatic tumor cells. Meth-ods The mRNA sequence of tumor associated antigen, MUC4, was obtained from NCBI, and MUC4 se-quence was acquired through the restriction enzyme sites and over lap PCR, then subcloned into adenovirus plasmid to create recombinant adenovirus ( rAd-MUC4) . The DCs were infected by rAd-MUC4 virus and then stimulated the lymph cells from the same donor to induce MUC4 specific cytotoxicity T lympbocytes ( CTL) . The efficacy of CTL was analyzed by LDH releasing assay. Elispot was used to detect the IFN-γ release. Results The recombinant adenovirus containing MUC4 ( sv12) gene was obtained. The MUC4-induced CTL could specifically kill the Capan-1 pancreatic tumor cells [ ( 13. 7±6.0)% , ( 21.4± 4. 7)% , (36.1±9. 5)% at ratios of 10: ,20: ,40: ] , higher than MCF-7 and Bxpc-3 cells respectively, P < 0. 05. The spots number of CTL induced by rAd-MUC4 was ( 139.1±23.3) , more than GFP and PBS control group,P<0.05. Conclusion The Muc4 gene modified DC vaccine could induce the proliferation of CTL, which provided a significant cytotoxicity to HLA-matched MUC4 positive tumor cell lines in vitro.     

紫杉醇抗癌研究荟萃

多烯紫杉醇卡铂与紫杉醇卡铂可用于卵巢癌一线化疗一般认为,含铂类和紫杉烷的药物是治疗卵巢癌的标准化疗。英国研究人员将多烯紫杉醇卡铂(Ⅰ组)与紫杉醇卡铂(Ⅱ组)用于1077例Ⅰc-Ⅳ期卵巢上皮癌或原发性腹膜癌的一线化疗。中数为23个月的随访显示,两组的无进展生存时间(progression—freesurvival,PFS)相似。Ⅰ组和Ⅱ组2年整体生存率(overallsurvivalrates,OSR)分别是62.4%和68.9%。但Ⅰ组3～4级粒细胞减少及由此引起的并发症呈统计学意义增多,尽管其骨髓抑制并未影响用药剂量或患者生命安全。两组综合生活质量(Globalqualityoflife)相似(JNatlCancerInst,2004,96:1682-1691)。     

用固相微萃取和气-质联用技术分析菘蓝叶中的挥发性成分

异硫腈酸盐是芥属蔬菜中典型的成分,具有化学防癌作用。由于菘蓝Isatis tinctoria L.叶中可能存在挥发性异硫腈酸盐,且对该植物中挥发性成分的研究鲜有报道,因此作者采用顶空固相微萃取(HS-SPME)和气-质(GC-MS)联用技术分析菘蓝叶中的挥发性成分。将3.5g样品溶于含5mL水的管形瓶中,平衡30min,在750r/min条件下搅拌萃取25min,萃取温度30℃。用于分析物热解吸的固定相纤维保持在260℃,共3min,观察多项参数对萃取最佳化的影响。在GC-MS分析中,采用带有Varian2000离子阱质谱仪的Varian3800气相色谱仪。使用2种不同的溶凝硅石毛细管柱:1)…     

多发性骨髓瘤的CT和X线平片分析（附9例报告）

骨髓瘤又称浆细胞瘤，它是由骨髓原始网状细胞的恶性增生而发生的一种恶性肿瘤。由于这种病少见，往往被临床医生忽略，易造成漏诊或误诊而延误治疗。     

足叶乙甙和顺铂方案治疗妊娠滋养细胞肿瘤临床观察

目的观察足叶乙甙和顺铂（EP方案）对恶性滋养细胞肿瘤治疗的近期疗效及毒副反应。方法应用EP方案治疗滋养细胞肿瘤32例,传统的5-氟尿嘧啶和更生霉素（FK方案）治疗滋养细胞肿瘤38例,比较2种治疗方案的近期疗效和毒副反应。结果FK组和EP组治疗完全缓解率分别为84.2%和87.5%（P〉0.05）;2组均有明显的骨髓抑制和胃肠道反应,但FK组骨髓抑制较EP组重。FK组腹泻和口腔溃疡的发生率分别为39.4%和44.7%均明显高于EP组的6.3%和9.3%（P〈0.01）。结论EP方案治疗恶性滋养细胞肿瘤具有良好的近期疗效且毒副反应较轻。     

Co-localization of histamine and norepinephrine in sympathetic ganglia and exocytosis of endogenous histamine from cardiac sympathetic nerve endings of macaca mulatto monkey

AIM To provide the evidence about localization, biosynthesis, metabolism and release of histamine from the cardiac sympathetic nerve terminals, and endogenous sympathetic histamine could inhibit itsel frelease from the nerve terminal through the presynaptic histamine H3 receptor. METHODS Using double-labeled immunohistochemistry to observe the co-localization of histamine and NE in the superior cer-vical ganglia (SCG) of macaca mulatto monkey; Different-speed centrifugation to obtain the cardiac sympathetic nerve terminal model (the cardiac synaptosomes), spectrofluorometer and ELISA techniques to detect the release of histamine from the cardiacsynaptosomes. RESULTS ( 1 ) The coexistence of histamine and norepinephrine immunoreactivities was identified in the same neuron within SCG of macaca mulatto monkey. (2) Depolarization of macaca mulatto monkey cardiac synaptosomes with 50 mmol/L potassium caused the release of endogenous histamine,     

HIV削弱CD8T细胞对其它病原体的应答

据Mdescape．com 8月11日报道（原载J Infect Dis2006：194：391—400），HIV和HCV联合感染的病人对由CD28细胞刺激CD8T细胞的应答比单独感染HCV的病人应答减少。     

螺旋体传染病

梅毒螺旋体荧光定量PCR检测方法的建立和初步临床应用；钩端螺旋体病患的临床观察及护理；梅毒螺旋体外膜蛋白Gpd在Hela细胞中的表达及鉴定；重组钩端螺旋体外膜蛋白酶联免疫吸附（ELISA）检测方法的建立；问号钩端螺旋体鞭毛相关基因flhA、flhB2和fliR的克隆及原核表达系统的构建；浙江省首次在蜱中检测到莱姆病螺旋体DNA片段。[编按]     

丙型肝炎

载脂蛋白B基因多态性及血脂水平与慢性丙型肝炎的相关性；HCV核心蛋白在酵母双杂交系统中的表达及自激活作用检测；HCVRNA在外周血单个核细胞中的复制与丙肝慢性化及复发的关系；丙型肝炎病毒持续感染对体外培养人胎盘合体滋养层细胞生物学性状的影响