BACTEC MGIT-960临床应用与结果分析

目的探讨BACTEC MGIT-960全自动分枝杆菌检测技术在结核病中的应用价值。方法用BACTEC MGIT-960对不同种类的标本进行分离培养及药敏试验．并与改良罗氏培养基法对比。结果BACTEC MGIT-960全自动分枝杆菌检测技术初代分离阳性时问平均为8．9天．药敏平均时间为7．1天。2152份各类标本总阳性率为29．23％．其中痰标本阳性率为31．22％。617株结核分枝杆菌的总耐药率为52．19％，其中初始耐药率为41．77％，获得性耐药率为74．24％，耐多药率(MDR)为17．02％。结论BACTEC MGIT-960全自动分枝杆菌检测技术是目前一种比较理想的快速检测结核菌的方法。     

BACTEC MGIT960在二线抗结核药物药敏试验应用中的效果评价

目的 评价BACTEC MGIT 960进行4种二线抗结核药物药敏试验的效果.方法 用MGIT 960对结核分枝杆菌临床分离菌株进行二线抗结核药物卷曲霉素、卡那霉素、氧氟沙星和乙硫异烟胺的药敏检测,并将结果与L-J比例法结果进行比较分析.结果 111 株结核分枝杆菌临床分离株用MGIT960法与L-J比例法卷曲霉索、卡...     

Phage lysin as a substitute for antibiotics to detect Mycobacterium tuberculosis from sputum samples with the BACTEC MGIT 960 system

Phage lysin was evaluated as a substitute for antibiotics in sputum samples processed by a modified Petroff's method for the detection of Mycobacterium tuberculosis with the MGIT 960 system. One hundred and fifty sputum samples were processed, inoculated onto two slopes of Lowenstein–Jensen medium, and divided in to two aliquots of 0.5 mL each. One aliquot was added to 7 mL of MGIT medium containing polymyxin B, amphotericin B, nalidixic acid, trimethoprim and azlocillin (PANTA) (MGIT-PANTA) and the other was added to 7 mL of MGIT medium containing 0.8 mL of lysin (MGIT-Lysin). The samples were randomized and incubated at 37°C in the MGIT 960 system. The sensitivity and specificity of MGIT-Lysin were 97% and 88%, respectively, as compared with MGIT-PANTA. The average times to detection with MGIT-Lysin and MGIT-PANTA were 9.3 and 8.6 days, respectively. The rate of contamination with MGIT-PANTA and MGIT-Lysin were 16% and 7.3%, respectively. Phage lysin can be substituted for antibiotics in processed sputum samples for the detection of M. tuberculosis.     

Expression of p-JAK2 predicts clinical outcome and is a potential molecular target of acute myelogenous leukemia

Our study determined if Janus kinase 2 (JAK2) was activated in acute myelogenous leukemia (AML; n = 77, excluding acute promyelocytic leukemia) by immunohistochemistry (IHC) using a phosphor-specific antibody against JAK2. p-JAK2 was detectable in all cases, although its levels varied between patient samples (high levels, n = 31; low levels, n = 46). The quantification of levels of p-JAK2 by IHC was well correlated with that assessed by Western blot analyses and fluorescence-activated cell sorting (FACS). Levels of p-JAK2 were directly correlated with high white blood cell count (52.3 × 10(3) /L in patients with high p-JAK2 vs. 28.3 × 10(3) /L in patients with low p-JAK2, p < 0.01) and were inversely correlated with complete remission rates (45% in patients with high p-JAK2 vs. 78% in patients with low p-JAK2, p < 0.003). In addition, multivariate analysis confirmed that high levels of p-JAK2 remained a significant factor for overall survival (hazard ratio = 2.213; 95% confidence interval, 1.212-4.041, p = 0.023). Moreover, we found that AZ960, a novel and specific inhibitor of the JAK2 kinase, potently inhibited the clonogenic growth and induced apoptosis of freshly isolated AML cells from patients in association with cleavage of caspase 3 and downregulation of anti-apoptotic Bcl-xL proteins. Taken together, JAK2 may be a promising molecular target for treatment of AML.     

1947-2008年PubMed中神经递质相关文献计量学分析

目的：了解PubMed中收录的神经递质文献增长的规律和趋势,为神经递质相关课题研究提供依据。方法：登录PubMed数据库,检索1947-01-01到2008-12-31间“神经递质（neurotransmitter）”的相关文献,进行文献分类,并按每年和每5年进行统计,再根据文献的语言分布和期刊分布进行分析。结果：1947至2008年底,PubMed数据库共收录神经递质文献960067篇,文献量呈逐年上升,其方程近似直线（Y=a＋bX）。神经递质文献中以英语为主,占86．25％。刊载文献的期刊有5200多种,其中与脑及神经科学、生物化学／药理学等相关期刊675种。刊登神经递质文献最多的24种期刊载文117103篇,占总文献量的12．12％,其中《脑研究（BrainRes）》和《欧洲药学杂志（Eur J Pharmac01）》收录神经递质文献超过10000篇。结论：神经递质研究文献以英文为主,文献量逐年缓慢递增,近似直线（Y=a＋bX）,说明神经递质研究一直处于较为热门阶段。刊载神经递质研究文献的期刊较分散,文中所列24种期刊是神经递质研究的核心期刊,其中《脑研究（BrainRes）》和《欧洲药学杂志（Eur J Pharmacol）》是该领域最权威的期刊。     

结核性胸膜炎患者胸腔积液分枝杆菌检测结果分析

目的 :通过分析结核性胸膜炎患者胸腔积液分枝杆菌检测结果,探讨提高其阳性检出率的方法。方法 :采集267例临床诊断为结核性胸膜炎患者的胸腔积液,离心后弃上清,用氢氧化钠(Na OH)消化处理,磷酸盐缓冲液(PBS)中和离心,取沉淀涂片抗酸染色镜检,接种MGIT960系统培养管和罗氏培养基,分析培养和涂片镜检结果 ,采用χ~2检验比较抗酸杆菌涂片与分枝杆菌培养阳性率的差异,BACTEC MGIT 960系统与罗氏培养阳性率的差异。结果:267例结核性胸膜炎患者胸腔积液经消化处理后,抗酸杆菌涂片阳性者81例,阳性率为30.6%,涂片1~8条/300个视野至1+以下者占涂片阳性的97.5%。罗氏培养233例,培养阳性39例,阳性率为16.7%,培养1+以下者为97.4%。MGIT960系统培养221例,培养阳性72例,阳性率为32.6%。消化后涂片法阳性率高于罗氏培养法(χ~2=7.92,P0.05)。结论:结核性胸膜炎患者胸腔积液中抗酸杆菌菌量少。胸腔积液经消化集菌可显著提高抗酸杆菌涂片阳性率。相比罗氏培养,MGIT 960系统能显著提高分枝杆菌培养的阳性率。