口腔黏膜下纤维性变S100蛋白表达

OBJECTIVE: To study the expression of S100 in oral submucose fibrosis(OSF). METHODS: Immunohistochemistry assay was performed on 10 cases of OSF, 10 cases of oral epithelial dysplasia (OED) and 8 cases of normal oral epithelium using monoclonal antibody against S100 protein. RESULTS: S100 did not express in the normal oral muscosal epithelium. The S100 positive nuclear staining was found in 50% of the OSF and OED cases, which was significantly higher than that in the normal oral epithelium (P < 0.05). But the positive staining in the OSF and OED cases had no difference (P > 0.05). CONCLUSION: S100 expression is closely related to the development of OSF and OED. The positive staining expression in the OSF and OED cases is the same.     

Protection of chickens against highly lethal H5N1 and H7N1 avian influenza viruses with a recombinant fowlpox virus co-expressing H5 haemagglutinin and N1 neuraminidase genes

Inactivated whole avian influenza virus (AIV) vaccine provides protection against homologous haemagglutinin (HA) subtype virus, but poor protection against a heterologous HA virus. Moreover, it induces chickens to produce antibodies to cross-reactive antigens, especially nucleoprotein, which is limits AIV serological surveillance. In this study, a recombinant fowlpox virus co-expressing HA (H5 subtype) and NA (N1 subtype) genes of AIV was evaluated for its ability to protect chickens against intramuscular challenge with a lethal dose of highly pathogenic (HP) AIV. Susceptible chickens were also vaccinated by wing-web puncture with the parent fowlpox vaccine virus. Following challenge 4 weeks later with HPAIV, all chickens vaccinated with recombinant virus were protected, while the chickens vaccinated with either the unaltered parent fowlpox vaccine virus or unvaccinated controls experienced 100% mortality following challenge. This protection was accompanied by the high levels of specific antibody to the respective components of the recombinant vaccine. The above results showed that rFPV-HA-NA could be a potential vaccine to replace current inactivated vaccines for preventing AI.     

皮质激素对人体血管收缩试验的研究

在20名正常人前臂内侧涂以4种以清凉油为基质含不同浓度地塞米松(0.1、0.05、0.025、0.0125%)的皮炎速灵油膏,并以清凉油作阴性对照,地塞米松软膏作阳性对照。采用改良的Mckenzie和Stoughton法,将六种药剂涂于同一个体,以消除个体间反应差异。涂药后3h拭去药物,再经2、3、4、5、7、9及21h进行观察并打分,在双盲条件下根据用药部位发白情况由3名评估者对每名受试者独立打分,应用Wilcoxon等经典秩和试验法进行统计分析,结果显示清凉油和所有含地塞米松的制剂之间存在着非常显著的差异,并对受试者反应和评估者打分的变异系数进行了计算。我们的体会是血管收缩试验在黄种人也是可行的,而这种打分系统只要提供足够数量的受试者,特别适宜于应用Wilcoxon等统计方法。     

Effects of Activated Complement on Lung Fluid Exchange in Conscious Goats:Role of Superoxide Anion

The effects of zymosan-activated plasma(ZAP)on lung fluid exchangeand on superoxide anion production by granulocytes were studied in 8 consciousgoats with chronic lung lymph fistula,It was found that after ZAP infusion, thecirculating granulocytes were activated and the release of superoxide anions wasmarkedly enhanced. There was an increase in lung lymph flow and proteinconcentration.It suggests that the superoxide anion released by the stimulatedgranulocytes can play a role in inducing lung injury by the activated complement.     

脐血抗—HPCA—2和Tük3标记的CD34阳性细胞的流式细胞仪比较分析

在标记脐血造血祖细胞表面抗原（ＨＰＣＡ），ＣＤ３４中，比较抗－ＨＰＣＡ－２－ＦＩＴＣ和Ｔｋ３（纯抗体）标记的ＣＤ（３４＋）细胞在流式细胞仪分析中的荧光特征及两种单抗标记的ＣＤ（３４＋）细胞与体外培养的粒单细胞集落形成单位（ＣＦＵ－ＧＭ），红系爆发形成单位（ＢＦＵ－Ｅ），和混合集落形成单位（ＣＦＵ－Ｍｉｘ）的相关性。结果发现脐血有核细胞中，抗ＨＰＣＡ－２阳性细胞占１．０５±０．７２％（ｎ＝１３），Ｔｋ３阳性细胞占２．０６±１．２５％（ｎ＝８），差别显著（Ｐ＜０．０５）。每毫升脐血两种抗体标记的细胞分别为９６．５６±５６．６４和２３１．４０±１６３．９３（Ｐ＜０．０５）。尽管ＨＰＣＡ－２阳性细胞与Ｔｋ３阳性细胞数量呈显著正相关（ｒ＝０．８７５，Ｐ＜０．０１），前者与ＣＦＵ－ＧＭ，ＢＦＵＥ，ＣＦＵ－Ｍｉｘ及集落总数ＣＦＵｓ均呈正相关，而后者仅与ＣＦＵ－ＧＭ，ＣＦＵｓ相关。研究提示在检测造血祖细胞时，用抗－ＨＰＣＡ－２－ＦＩＴＣ代替Ｔｋ３可降低假阳性，获得较好的ＯＤ（３４＋）细胞与ＣＦＵ间的线性关系。     

用结合^131碘和化疗药物的明胶微球作肝动脉...

Nine patients with inoperable hepatoma were treated by using hepatic arterial embolization 131I and chemotherapeutic agent gelatin microsphere (131I-CA-GM). The emission CT after operation detected that the microspheres were concentrated on tumor area. The ratio between the radioactivity in tumor and that in liver was 4.1:1. A case died of ictopic embolization; the others survived 3, 4, 5, 19, 24, 7, 8, and 12 months respectively. Three of them were still alive. 131I-CA-GM has triple anticarcinogenic actions, including the arterial occlusion, targeting chemotherapy and internal radiation. The microspheres can selectively accumulate in the tumor artery and can be easily traced by gamma-camera or emission CT. 131I-CA-GM is a hopeful embolic agent for the treatment of liver cancer, but some problems about ectopic arterial embolization should be further studied.     

氟中毒和氟砷中毒对胃粘膜的影响

作者通过内窥镜对新疆奎屯地区氟中毒患者３５名，氟砷中毒患者３２名，对照组２５名的胃粘膜进行观察，旨在了解氟元素和砷元素对胃粘膜的影响，在３个组中慢性胃炎的炎症程度与炎症活动性有显著性差异。２个中毒组间无显著性差异。结果表明在高氟区和高氟砷区患者的胃粘膜层病理改变主要是任性氟中毒引起，单纯性砷中毒并无协同作用。     

旋毛虫幼虫分泌物抗原在小鼠体内诱生肿瘤细胞毒因子的研究

本文应用Ｌ９２９细胞杀伤法，对注射旋毛虫肌肉期幼虫分泌物（Ｌ１ＥＳ）的小鼠血清进行了检测，发现Ｌ１ＥＳ对已注射卡介苗（ＢＣＧ）或感染旋毛虫的小鼠，均能诱生肿瘤细胞毒因子（ＴＣＦ），而正常对照鼠则不能发生，表明Ｌ１ＥＳ诱生ＴＣＦ需要首先激活巨噬细胞（Ｍφ）这一基本条件。将Ｌ１ＥＳ置３７℃、１ｈ，５６℃、３０ｍｉｎ或１００℃、２ｍｉｎ处理后，其诱生ＴＣＦ的能力均明显高于对照组（Ｐ＜０．０５）。Ｌ１ＥＳ     

A pathway for the biosynthesis of straight and branched, odd- and even-length, medium-chain fatty acids in plants.

Pathways and enzymes of fatty acid synthase-mediated, long-even-chain (generally C16-C20) fatty acid synthesis are well studied, and general metabolism involved in short-chain (C4-C7) fatty acid biosynthesis is also understood. In contrast, mechanisms of medium-chain (C8-C14) fatty acid synthesis are unclear. Recent work suggests involvement of chain-elongation-terminating thioesterases in medium-chain fatty acid formation in oilseeds and animals. We have shown that iso- and anteiso-branched and straight, odd- and even-length, short-chain fatty acids esterified in plant-trichome-gland-produced sucrose esters are synthesized by using carbon skeletons provided by modified branched-chain amino acid metabolism/catabolism. The principal enzymes involved are those catalyzing leucine biosynthesis in all organisms and those leading to short-chain alcohols in mutant yeasts and alkyl acids in Clostridium species (products often serving as mammalian pheromones). Here we provide evidence that C10-C12 straight medium-chain and C10-C12 branched medium-chain acyl acids of tomato, C6-C8 straight-chain acyl acids of Petunia, and C6 and C8 branched acyl acids of Nicotiana glutinosa are formed by alpha-ketoacid elongation without participation of fatty acid synthase-mediated reactions or -independent thioesterases. This different metabolism suggests greater integration of amino acid and fatty acid metabolism than previously considered and provides other avenues to study and manipulate not only straight even-length but also odd- and even-length straight and branched medium-chain fatty acid biosynthesis.