肿瘤坏死因子、更生霉素和干扰素-γ联合应用对人卵巢癌裸鼠模型的协同作用

目的：研究联合应用肿瘤坏死因子（TNF）、干扰素－γ（IFN－γ）和更生霉素（KSM）对人卵巢癌裸鼠模型的协同作用。方法：将荷瘤裸鼠随机分成4组，分别用生理盐水、KSM、TNF＋IFN－γ、KSM＋TNF＋IFN－γ处理，观察肿瘤生长情况。结果：各组肿瘤相对体积比较，KSM组和KSM＋TNF＋IFN－γ组与对照组比较，差异有显著性（P＜0．05和P＜0．01）；TNF＋IFN－γ组与对照组比较，差异无显著性（P＞0．05），而KSM＋TNF＋IFN－γ组与KSM组比较，差异有显著性（P＜0．05）。结论：KSM与TNF、IFN－γ联合应用有协同抗卵巢癌细胞系3AO的作用，为临床应用提供了理论依据。     

NK细胞识别的新模式——压力诱导模式

T、B细胞通过TCR和BCR介导抗原识别模式,巨噬细胞通过模式识别受体(pattern recognition receptor,PRR)介导病原体相关的分子模式(pathogen associated molecular pattern, PAMP)或凋亡细胞相关的分子模式(apoptotic cell associated molecular pattern, ACAMP),比TCR,BCR和PRR更为复杂的是NK细胞的受体,迄今为止,已发现有数十种之多,分属抑制性受体和活化性受体两大类.各大类又包括数个家族,体现了NK细胞受体的多样性,介导了NK细胞的不同识别模式,分别传递不同的活化信号和抑制信号[1-2].     

我院麻醉药品及精神药品的用药分析

目的了解麻醉药品、精神药品的临床应用情况及用药趋势。方法统计分析我院药库微机管理系统提供的2002-2003年麻醉药品、精神药品的数据。结果2002-2003年我院麻醉药品、精神药品中美施康定片和安定片的用药频度都处于第1位,吗啡类制剂用量增幅较大。结论麻醉药品、精神药品作为特殊管理的药品,应加强药品管理和注意合理用药。     

艾滋病预防控制策略

1世界艾滋病预防控制的经验与措施自1981年在美国首次报告获得性免疫缺陷综合征(简称艾滋病, AIDS)临床患者至今已20多年, AIDS已蔓延至世界各地,成为人类面临的危害最大的疾病之一。目前,全球累计艾滋病病毒(H IV)感染者已超过7000万。世界卫生组织(WHO )和联合国艾滋病规划署(UN-AIDS)估计至2004年底全球存活的H IV /AIDS人数已达3940万(3590~4430万)。在艾滋病的预防控制工作中,世界各国积累了许多丰富的经验和有效的控制策略,其中有些具有基本的、普遍性的原则,我们可以学习借鉴。它们主要体现在以下几方面。1·1政府重视,经…     

Inducible nitric oxide synthase expression elicited in the mouse brain by inflammatory mediators circulating in the cerebrospinal fluid

Expression of inducible nitric oxide synthase (iNOS) protein was studied in the brain after intracerebroventricular injections of interferon (IFN)-gamma, and IFN-gamma combined with lipopolysaccharide (LPS) or tumor necrosis factor (TNF)-alpha, compared to ovalbumin as control. Wild-type mice and mice with targeted deletion of the IFN-gamma receptor gene were used. Findings based on iNOS immunoreactivity were evaluated at 1, 2, 4 and 7 days post-injection, using also quantitative image analysis and double labeling with glial cell markers. IFN-gamma administration induced iNOS immmunostaining in activated microglia and macrophages in the parenchyma surrounding the ventricular system, several cortical fields and fiber tracts. IFN-gamma-elicited iNOS immunoreactivity was down-regulated after 1 day. The number of iNOS-immunopositive cells was significantly enhanced by co-administration of LPS or TNF-alpha; IFN-gamma+TNF-alpha injections also resulted in longer persistence of iNOS immunoreactivity. No immunopositive cells were seen in the brain of IFN-gamma receptor knockout mice after IFN-gamma administration; very few immunostained macrophages were detected in these cases, mostly around the injection needle track, after co-administration of LPS or TNF-alpha. Western blot analysis confirmed a marked iNOS induction in the brain of wild-type mice 24 h after IFN-gamma+LPS injections. The findings show that inflammatory mediators circulating in the cerebrospinal fluid induce in vivo iNOS in the brain with topographical selectivity and temporal regulation. The data also demonstrate that the signaling cascade activated by IFN-gamma binding to its receptor is critical for iNOS induction, and the synergistic action of LPS and TNF-alpha as iNOS inducers in brain cells is largely mediated by the receptor-regulated action of IFN-gamma.     

高血糖高渗状态患者124例临床分析

目的探讨高血糖高渗状态(HHS)患者的病死率与器官功能衰竭、血浆渗透压、年龄的关系。方法回顾分析我院1997年￣2003年住院的124例HHS患者的临床资料。结果①124例HHS患者病死率为38.7%。②病死率与器官功能衰竭显著正相关,且与所并发器官功能衰竭的个数成正比。③病死率与年龄、血浆渗透压正相关。结论治疗HHS的同时积极防治器官功能衰竭是降低死亡率的关键。     

大豆与豆豉中游离氨基酸总量测定

目的: 探讨大豆和经过发酵后的豆豉游离氨基酸总量的变化.方法: 采用氨基酸的游离氨基与水合茚三酮产生显色反应,在一定范围内,其颜色的深浅与氨基酸的含量成正比.结果: 波长570 nm处含氮量在0～5 μg吸收度值与含氮量值线性关系良好,r＝0.999 9(n＝5),且豆豉中游离氨基酸总量与大豆中游离氨基酸总量存在显著性差异.结论: 大豆在经过发酵后游离氨基酸总量产生明显变化,更易被人体所吸收,其营养价值更高.     

The expression of TRPA1 mRNA in the rat brain

Objective： To investigate the distribution of TRPA1 （one kind of the TRP-like ion channel family） channel in the hippocampus and cerebral cortex of rat. Methods： RT-PCR was used to amplify the fragment of TRPA1 in the DRG （dorsal root ganglion）, hippocampus and cerebral cortex of adult SD rat. In situ hybridization staining was used to show the distribution of TRPA1 mRNA in the hippocampus and cerebral cortex of adult rat brain. Results： Both RT-PCR and in situ hybridization staining showed that TRPA1 mRNA was expressed in hippocampus and cerebral cortex of the adult rat brain. Conclusion： Our results suggest that there is expression of TRPA1 mRNA both in the hippocampus and cerebral cortex of the adult rat brain.     

Glutamate receptors within the nucleus of solitary tract contribute to pancreatic secretion stimulated by intraduodenal hypertonic saline

High-speed counter-current chromatography （HSCCC） with a solvent system composed of ethyl acetate-n-buta- nol-water （2 ： 1 ： 3, V/V/V） was used to isolate and separate two C-glycosylflavones from Patrinia villosa Juss, a traditional Chinese medicine. The separation produced 42.9 mg isovitexin and 20.1 mg isoorientin with purities of 99.3% and 98.5%, respectively as determined by high-performance liquid chromatography （HPLC） in one step elution from 250 mg crude extract, and identification was performed by MS, ^1H NMR and ^13C NMR. It is the first report of discovering isovitexin and isoorientin from the plant of Patrinia genus.     

实验动物和脏器标本的摄影方法

文章结合实践介绍了实验动物和脏器标本的摄影方法及注意事项,为从事这方面工作的科技人员提供了技术支持。