人端粒酶RNA的cDNA探针制备及其对胃粘膜细胞端粒酶RNA表达的检测

目的 建立人端粒酶RNA表达的检测方法。方法 制备人端粒酶RNA，(human telomeraseRNA，hTR)的cDNA探针，分别应用RNA斑点杂交与端粒重复序列扩增法(TRAP)分析检测不同胃粘膜的端粒酶RNA的表达与端粒酶活性。结果 人端粒酶RNA的cDNA探针制备成功。18例活检胃癌组织及45例手术胃癌组织RNA斑点杂交检测的阳性率均为l00％，相应TRAP分析的阳性率分别为88．89％、86．67％，低于RNA斑点杂交(P＜0．05)。同时RNA斑点杂交结果提示在非癌胃组织中随着肠化程度增高人端粒酶RNA表达也增强。结论 RNA斑点杂交检测人端粒酶RNA，具有高度的敏感性和特异性，弥补了TRAP分析敏感性不足的缺点。     

Anatomic bases of tongue flaps

Summary The morphological structure of the lingual a. was studied in 50 dissected and 14 vascular cast specimens. The course of this artery is divided into 4 segments: the original segment, the segment within hyoglossus, the ascending and the horizontal segments of the deep lingual a. The root of the tongue is supplied by 2 to 3 root branches of the lingual a., the ascending palatine a. and the tonsillar a. The body of the tongue is nourished on average by 25 arterial branches from the deep lingual a. The ventral surface of the tongue, as well as the sublingual gland and the floor of the mouth, is supplied by the sublingual a. The termination of the lingual a. anastomoses with the submental branch of the facial a. to form the lingual frenal a. Except for a submucous arterial network on the dorsum of the tongue, all blood vessels are separated completely by the lingual septum, through which arterial anastomoses (2.0 mm in diameter) can be found occasionally.This work was supported by the National Natural Science Fund     

Investigation of cross-infection of Pseudomonas aeruginosa in an intensive care unit]

OBJECTIVE: To investigate the factors responsible for Pseudomonas aeruginosa nosocomial cross-infection in the intensive care unit (ICU) and provide effective measure for the prevention and management. METHODS: The homology of 7 Pseudomonas aeruginosa strains isolated from the patients in the ICU and the environment was examined by biological, serological, drug-resistance and plasmid analysis. RESULTS: The results of serological and plasmid analyses had good consistency, which demonstrated that the 7 Pseudomonas aeruginosa strains originated from solution in the oxygen humidifier, with uniform serological and plasmid type, and belonged to the same clone with cross-infection by contact between the patients or nursing staff and the objects in the ICU. CONCLUSION: Serological and plasmid analyses are more practical for identifying the sources of Pseudomonas aeruginosa cross-infection, which can be prevented by strict disinfection of the instrument and supervision of the nursing staff in the ICU.     

战士体内VitB_1、VitB_2储备水平检测

选择南方热区某特种部队战士５２人，分两组分别口服５ｍｇＶｉｔＢ１和ＶｉｔＢ２，收集４ｈ尿液，用荧光法进行负荷试验。结果：ＶｉｔＢ１组，所测２９人中，１５人缺乏，９人不足，２人正常，３人充裕；ＶｉｔＢ２组，所测２３人中，１１人缺乏，１２人不足，反映该部队全年约５％的发病是由于ＶｉｔＢ１、ＶｉｔＢ２缺乏不足所致。其原因为膳食摄入不够     

二阶导数光谱法测定尿中呋喃妥因浓度

本文采用有酸性条件下用乙酸乙酯萃取呋喃妥因后，通过二阶导数光谱法测定尿中呋喃妥因的浓度。该法定量信息为３７４￣３７７ｎｍ处的峰谷之间距离，最低检出浓度为１．５ｍｇ／Ｌ，回收率为９８％，相对标准差小于３％；本法与ＨＰＬＣ法进行了对照性研究。两法具有明显的相关性（ｒ＝０．９９９１）。本法可用于呋喃妥因药动学的研究。     

氟尿嘧啶对大鼠小肠的损伤作用研究

目的：探讨氟尿嘧啶对大鼠小肠的损伤作用,方法：通过胃管连续2d给予大鼠尿嘧啶125mk/kg.d,观察给药后第1天－第7天大鼠每日饮食量的变化,给药前和给药后的第8天分别称大鼠体重,给药后第8天测定门静脉血流量及门静脉压,分析小肠形态学变化,观察小肠对色氨酸吸收能力,测定动脉血谷氨酰胺的浓度,结果：给药后第1天－第7天大鼠饮食量均明显低于正常,尤其是第2天－第4天最为严重,第8天大鼠体重下降,小肠结构有明显损伤,门静脉血流量减少,门静脉压下降,小肠对色氨酸的吸收及动脉血谷氨酸胺浓度明显下降,与对照组相比的均有显著差异,结论：氟尿嘧啶可导致大鼠小肠结构和功能的明显障碍。     

带血管蒂第二,三掌骨瓣转位修复手舟骨骨折的应用解剖

观察40侧成人手标本,第一掌背动脉是第二掌骨背桡侧的主要血供来源,可分3种类型.可以第二掌背动脉为蒂,第二、三掌骨近端和远端骨瓣转位.修复陈旧性手舟骨骨折。文中讨论了与该术式有关的应用解剖学要点.     

恶性肿瘤患者甲床紫晕与舌下络脉变化的对比观察

甲床紫晕指甲半月远侧甲床上的紫色晕带,宽约2mm以上。伴指压反应延迟者,多见于肺癌、肺转移癌、肝癌、全身转移癌等重症肿瘤及肺心病、支气管哮喘及慢性支气管炎等阻塞性肺疾患,辨证均属血瘀证。铸型标本显示甲床有三级血管弓,第一级弓发出直行血管,血流为瀑布样直流,不易瘀滞;第二级弓发出的微血管互相交叉吻合形成网眼,血流变缓,其弓正当甲半月远侧,在气滞血瘀微循环障碍时易形成甲床紫晕。通过与吉下络脉同步观察,认为两者均可作血瘀证体征。     

鼻泰治疗变应性鼻炎的实验研究

鼻泰为治疗变应性鼻炎的中药滴鼻剂。实验表明，该药可抑制大鼠肥大细胞脱颗粒，抑制小鼠皮肤被动过敏反应，抑制实验性变应性鼻炎家兔的鼻粘膜炎症反应并减少其Ｐ物质水平。     

Photodecomposition,photomutagenicity and photocytotoxicity of retinyl palmitate under He–Ne laser photoirradiation and its effects on photodynamic therapy of cancer cells in vitro

ObjectiveOur aim was to study photodecomposition, photomutagenicity and cytotoxicity of retinyl palmitate (RP), a principal storage form of vitamin A in humans and animals, under He–Ne laser photoirradiation. Moreover, the effect of different concentrations and timing protocol of antioxidants on photodynamic therapy (PDT) is contradictory, so the effect of RP (as antioxidant) on the PDT cytotoxicity was studied.MethodsPhotomutagenicity was tested by Ames test. Photodecomposition was studied by UV–vis spectroscopy. Cytotoxicity was measured with MTT-assay. Moreover, the effect of PDT, using hematoporphyrin derivatives (HpD) as photosensitizer under He–Ne laser irradiation (10 J/cm²), was studied on HeLa cells either with or without RP (1–100 μM) which incubated with the cells for short or long incubation period (1 h or 24 h) prior to PDT.ResultsNo photodecomposition of RP alone was obseved whereas there is a little photodecomposition of RP only in presence of HpD under irradiation with He–Ne laser. Moreover, no photomutagenicity was observed in Salmonella typhimurium strains under laser irradiation in presence or absence of HpD. RP alone (1–100 μM) significantly decrease the viability of HeLa cells. Laser irradiation of HeLa cells pre-incubated with RP alone for 24 h showed further significant decrease in viability of the cells. While RP incubations for 1 h before PDT had slight effect on the cells, 24 h incubation before PDT enhanced the cytotoxicity of PDT on HeLa cells.ConclusionsRP can be used 24 h before PDT to enhance its effects. RP is not mutagenic under irradiation with He–Ne laser.