前不均倾位51例临床分析

目的:探讨前不均倾位的诊断及处理方法,以期提高临床医师对前不均倾位的认识。方法:对我院1995年1月~2006年11月收治的51例前不均倾产妇的发病年龄、胎产次、发病原因、临床表现、母儿产时产后并发症及诊治方法进行分析。结果:50例前不均倾均以剖宫产结束分娩、母婴安全。1例自然分娩。结论:前不均倾位产时并发症多,不易做出早期诊断,对母婴危害大,难以经过阴道分娩,诊断一旦明确,应及时行剖宫产终止妊娠。     

白细胞介素-4和γ-干扰素基因联合治疗胶质瘤

目的 探讨逆转录病毒载体介导的白细胞介素(IL)-4和γ-干扰素(IFN)基因联合治疗胶质瘤的作用。方法构建携带IL-4或IFN-γ基因的逆转录病毒载体，将其导入逆转录病毒包装细胞；将携带IL-4和IFN-γ基因的逆转录病毒包装细胞分别或联合注射到脑内荷瘤大鼠的肿瘤组织中，观察其治疗作用。结果成功获得携带治疗基因的逆转录病毒包装细胞PA317IFN-γ和PA317IL-4，所产病毒滴度分别为2x10^6cfu／ml和2．5x10^6cfu／ml。包装细胞瘤内注射能够诱导大鼠产生抗肿瘤免疫反应，杀伤肿瘤细胞，联合应用具有协同治疗作用。结论携带IL-4或IFN-γ基因的逆转录病毒包装细胞瘤内注射是一种有效的胶质瘤基因治疗方法，两者联合应用具有协同治疗作用。     

大学生应对方式研究

介绍了大学生应对方式研究现状．重点阐述了大学生常用的应对方式、影响因素及应对方式对大学生心理健康的影响。     

胃微小腺癌的组织发生研究

从２１０５例胃癌癌旁组织中找出微小腺癌３１例（〈０．１ｃｍ），观察其组织发生的特征，发现胃腺癌的发生有８种形式：①腺颈部干细胞癌变；②表面上皮癌变；③腺上皮癌变；④肠化生上皮癌变；⑤微腺囊癌变；⑥溃疡边缘上皮癌变；⑦扁平腺瘤癌变；⑧贲门交界处柱状上皮癌变。     

红细胞分化调节因子对体外培养的L929和KB细胞的生长抑制作用

从兔网织红细胞提纯的红细胞分化调节因子(erythroid differentiation factor,EDF),能对体外培养的自发转化成纤维细胞系L929及人鼻咽癌细胞系KB产生作用。当EDF剂量为0.10μg/ml时,可引起L929细胞形态发生改变,并有细胞核固缩现象。第2d的细胞生长抑制率为64.86％,软琼脂集落形成率为0;第5d时细胞增殖为负值。~3H-TdR掺入率明显降低。EDF剂量为0.15μg/ml时,对KB细胞生长已有抑制作用。EDF剂量达0.30μg/ml时,生长抑制明显。以上结果证明了EDF对恶性细胞具有增殖抑制作用。这种作用对不同种类细胞敏感性不同,并且与剂量呈正相关。     

重度烫伤小鼠血清及去补体后血清诱导巨噬细胞凋亡作用的体外实验研究

目的　探讨重度烫伤小鼠血清及去补体血清在体外诱导腹腔巨噬细胞 (pMФs)凋亡及其机制。方法　采用小鼠 30 %TBSAⅢ度烫伤模型 ,分为正常对照组、烫伤组、去补体烫伤组 ,检测各组伤后 6h血清对体外培养的pMФs分泌超氧阴离子 (O2- )和一氧化氮 (NO)产量的影响 ,碘化丙锭 (PI)染色流式细胞术及凋亡电泳试验测定pMФs的凋亡情况。结果　与正常对照测值比较 ,烫伤血清诱导pMФs分泌较多的O2- 和NO ,去补体后烫伤血清诱导O2- 和NO的分泌量显著降低。烫伤血清诱导pMФs凋亡明显增加 ,去补体后烫伤血清和活性氧阻断剂PDTC及NO阻断剂AG能阻断绝大部分pMФs的凋亡。结论　重度烫伤小鼠血清补体能在体外诱导pMФs凋亡 ,O2- 和NO等炎性介质在其中发挥了重要作用     

A vaccine against coccidioidomycosis is justified and attainable.

Coccidioides is a fungal pathogen of humans which can cause a life-threatening respiratory disease in immunocompetent individuals. Recurrent epidemics of coccidioidal infections in Southwestern United States has raised the specter of awareness of this soil-borne microbe, particularly among residents of Arizona and Southern California, and has galvanized research efforts to develop a human vaccine against coccidioidomycosis. In this review, we discuss the rationale for such a vaccine, examine the features of host innate and acquired immune response to Coccidioides infection, describe strategies used to identify and evaluate vaccine candidates, and provide an update on progress toward development of a vaccine against this endemic pathogen.     

三氧化二锑诱导急性早幼粒细胞白血病细胞凋亡的研究

目的 研究锑剂三氧化二锑（Sb2O3)对早幼粒细胞白血病细胞株NB4凋亡的诱导作用，以寻求早幼粒细胞白血病治疗的新方法。方法 采用细胞生长曲线，形态学及硝基四氮唑蓝（NBT）还原试验，判定NB4细胞的生长，分化及功能。采用细胞周期分析和DNA电泳研究细胞凋亡。结果 Sb2O3能诱导早幼粒白血病细胞凋亡，且具有时间，剂量依赖性。结论 Sb2O3能有效地诱导早幼粒白血病细胞凋亡，提示锑剂诱导细胞半亡的疗法，有望成为临床治疗早幼粒细胞白血病的新方法。     

Nutritional effects on host response to lung infections with mucoid Pseudomonas aeruginosa in mice

In cystic fibrosis, a recessive genetic disease caused by defects in the cystic fibrosis conductance regulator (CFTR), the main cause of death is lung infection and inflammation. Nutritional deficits have been proposed to contribute to the excessive host inflammatory response in both humans and Cftr-knockout mice. Cftr-knockout mice and gut-corrected Cftr-knockout mice expressing human CFTR primarily in the gut were challenged with Pseudomonas aeruginosa-laden agarose beads; they responded similarly with respect to bronchoalveolar lavage cell counts and levels of the acute-phase cytokines tumor necrosis factor alpha, interleukin-1beta (IL-1beta), and IL-6. Wild-type mice fed the liquid diet used to prevent intestinal obstruction in Cftr-knockout mice had inflammatory responses to P. aeruginosa-laden agarose beads similar to those of wild-type mice fed an enriched solid diet, so dietary effects are unlikely to account for differences between wild-type mice and mice with cystic fibrosis. Finally, since cystic fibrosis patients and Cftr-knockout mice have an imbalance in fatty acids (significantly lower-than-normal levels of docosahexaenoic acid), the effects of specific supplementation with docosahexaenoic acid of wild-type and Cftr-knockout mice on their inflammatory responses to P. aeruginosa-laden agarose beads were tested. There were no significant differences (P = 0.35) in cumulative survival rates between Cftr-knockout mice and wild-type mice provided with either the liquid diet Peptamen or Peptamen containing docosahexaenoic acid. In conclusion, diet and docosahexaenoic acid imbalances alone are unlikely to explain the differences in the host response to lung infections with mucoid P. aeruginosa between mice with cystic fibrosis and their wild-type counterparts.