The inhibitory effect of ambroxol on hypochlorous acid-induced tissue damage and respiratory burst of phagocytic cells

Ambroxol (100 microM and 1 mM) and the thiols (all 1 mM), glutathione, tiopronin and cysteine, significantly attenuated the myeloperoxidase, H(2)O(2) and Cl(-) system-caused destruction of alpha(1)-antiproteinase and the HOCl-induced destruction of collagen, whereas they did not affect the elastase-induced destruction of collagen. Glutathione, tiopronin and cysteine almost completely decomposed both HOCl and H(2)O(2), while ambroxol up to 1 mM did not show a scavenging action on H(2)O(2). Ambroxol (1 to 100 microM) and 1 mM thiol compounds markedly inhibited the HOCl-induced alteration of elastase activity. Thiol compounds significantly attenuated the HOCl production caused by degraded immunoglobulin G-activated neutrophils. Ambroxol depressed superoxide and H(2)O(2) production induced by degraded immunoglobulin G-activated neutrophils and by lipopolysaccharide-activated alveolar macrophages in a dose-dependent manner. The results show that ambroxol may interfere with oxidative tissue damage and decrease proteolytic tissue destruction by attenuation of oxidative stress-induced inactivation of alpha(1)-antiproteinase through both decomposition of HOCl and inhibition of the respiratory burst in phagocytic cells.     

Synthesis of 4-hydroxy-1-thiocoumarin derivatives-1: An efficient synthesis of thioflocoumafen

An efficient procedure for the preparation of 4-hydroxy-3-{1,2,3,4-tetra-hydro-3-[4-(4-triflu-oromethylbenzyl oxy)phenyl]-1-naphthyl}thiocoumarin (thioflocoumafen, 1a and 1b) is described. The key step in the synthesis involves the condensation reaction of 3-(4-methoxyphenyl)-1-tetralol (2) with 4-hydroxy-1-thiocoumarin (3).     

Factors affecting practice-area choices by pharmacy students in the Midwest.

The results of a survey to determine the first-choice practice intentions of midwestern pharmacy students and to describe and quantify the factors affecting their decisions are reported. Questionnaires were sent to 12 pharmacy schools in American Association of Colleges of Pharmacy District IV and distributed during November 1988 to January 1989. The questionnaires were given to entry-level pharmacy students who were in their final year of study. The students were asked to indicate their preferred practice setting upon graduation and to rate the importance of 21 factors that a pharmacist might consider when selecting a first position. A total of 715 usable responses were received (response rate, 6.75%). OF the respondents, 83.2% were enrolled in B.S. degree programs and 16.8% in entry-level Pharm.D. degree programs. The distribution of first choices of a practice area was as follows: chain community pharmacy, 33.1%; hospital pharmacy, 27.6%; independent community pharmacy, 12.4%; industry, 8.4%; "other," 5.5%; ambulatory-care clinic, 5.2%; graduate school, 3.8%; department store, discount store, or grocery store, 1.7%; home health care, 1.5%; and nursing home, 0.8%. The three factors ranked as most important in affecting the choice of a practice area were personal fulfillment, salary, and the opportunity to use one's abilities and education. The ranking of the factors varied depending on the practice area chosen. Midwestern pharmacy students were most interested in chain community and hospital pharmacy practice settings. Retail-oriented students placed salary concerns first, whereas clinically oriented students emphasized personal fulfillment. These findings have implications for recruitment strategies.     

内皮素、一氧化氮在毛细支气管炎和哮喘患儿中的变化

目的　 探讨血内皮素 (ET)和一氧化氮 (NO)在毛细支气管炎 (毛支 )和婴幼儿哮喘 (哮喘 )中的变化及意义。 方法 　用放射免疫分析法和分光光度比色法分别检测毛支、哮喘患儿急性期和缓解期血ET和NO ,并与正常儿童进行比较。 结果 　血浆ET在毛支组和哮喘组 ,急性期均明显高于正常组 (P均 <0 0 1) ,缓解期均下降 ,与正常组比较无显著差别 (P均 >0 0 5 ) ;两组急性期比较无差别 (P >0 0 5 )。与血浆ET一样 ,血清NO在毛支组和哮喘组 ,急性期均显著高于正常组 (P <0 0 1和P <0 0 5 ) ;缓解期则下降 ,与对照组比无显著差别 ,(P均 >0 0 5 ) ;两组急性期相比 ,差异无显著性 (P >0 0 5 )。两组急性期血浆ET与血清NO呈明显正相关 (P <0 0 5 )。 结论 　在毛支和哮喘中 ,血ET和NO均升高 ,二者关系密切 ,均可能参与毛支及哮喘的发病     

PCR快速鉴定actinobacteria三种模板制备方法的比较

目的 本研究旨在建立准确、简便、快速的放线细菌鉴定技术，为普通和极端环境放线细菌资源的调查和开发利用创造条件。方法 从放线细菌固体培养基上挑取少量菌体，用微波炉法快速制备基因组DNA作为PCR模板，与液体培养法得到的菌体以超声波法或冻融法制备的模板进行了PCR扩增效果的比较研究。结果P CR检测结果表明微波炉法制备的模板可进行有效的体外扩增，目的条带特异，而超声波法或冻融法并不对所有菌株有效，并有非特异扩增产物产生。结论 组合微波炉法快速制备放线细菌基因组DNA技术和23S rRNA特异插入序列PCR扩增技术建立了准确、简便、快速的actinobacteria鉴别体系。     

HPLC法测定复方联苯双酯颗粒中肌苷的含量

目的:应用HPLC色谱法测定复方联苯双酯颗粒中肌苷的含量.方法:采用C8柱以甲醇-水(60:40)为流动相,检测波长为248 nm.结果:肌苷线性范围为2.50～25.00μg·ml-1,r=0.999 97(n=6).肌苷平均回收率100.1%,RSD 0.4%(n=9).结论:方法简便,结果准确,重复性好.     

抗补体蛋白对大鼠局灶脑缺血损伤的作用

0　引言　近年来脑缺血损伤的早期炎症受到重视 .有学者观察到在人脑梗塞部位白细胞集聚 ,临床预后与梗塞部位的白细胞数量有关 ,白细胞多者预后差 [1 ] .还有文献描述了大鼠持续性脑缺血损伤中的多形核中性细胞反应的时间过程 ,收稿日期 :1999-0 3 -2 6;　修回日期 :1999-0 5 -13基金项目 :国家自然科学基金资助项目 ( 3 9170 3 15 ) ;全军医药卫生科研基金资助项目 ( 92 5 0 5 2 )作者简介 :刘　立 ( 195 8-) ,男 (汉族 ) ,江苏省无锡市人 .副教授 ,博士 .Tel.( 0 2 9) 3 3 74819缺血 30 min就可以观察到多形核中性细胞于缺血部位的微血…     

Kinetic analysis shows that iron deficiency decreases liver vitamin A mobilization in rats

In view of evidence that nutritional status of iron and vitamin A may affect the other nutrient's metabolism, we used model-based compartmental analysis to examine effects of iron deficiency on whole-body vitamin A dynamics in rats. Weanling male Sprague-Dawley rats were fed the AIN93G diet with 2.5 nmol retinyl palmitate/g and either 45 [control (CN)] or 4 microg/g Fe [iron-deficient (ID)] for 8 wk. ID rats consumed food ad libitum; CN rats were food-restricted so that their body weights were the same as ID rats. Two rats/group were killed; liver vitamin A was determined and used for vitamin A balance calculations. [(3)H]Retinol-labeled plasma was administered intravenously to remaining rats, and 27 serial blood samples were collected for 7 wk. At killing, plasma vitamin A was 0.52+/-0.12 (ID, n = 5) vs. 1.34+/-0.12 micromol/L (CN, n = 6; P<0.001), and liver vitamin A was 809+/-94 (ID) vs. 112+/-24 nmol (CN, P<0.001). Plasma tracer data were fit to a three- or four-compartment model using the Simulation, Analysis and Modeling computer program and kinetic parameters were calculated. Vitamin A transfer rate between the retinyl ester storage pool [14+/-3 (ID) vs. 24+/-4 nmol/d (CN), P<0.05] and plasma was lower in ID rats. Vitamin A remained longer in the body [44+/-11 (ID) vs. 22+/-3 d (CN), P<0.05]. Adjusted mean disposal rate was lower in ID (10.0) than CN rats (19.9 nmol/d), as was estimated vitamin A absorption efficiency [58% (ID) vs. 76% (CN)]. Our results suggest that iron deficiency inhibits mobilization of vitamin A stores and may decrease the absorption and irreversible utilization of vitamin A.