猕猴桃汁抗环磷酰胺致突变作用的机理

目的用大鼠外周血双核淋巴细胞微核测试法（ＣＢＭＮＴ），在哺乳动物整体水平，研究猕猴桃汁抗环磷酰胺（ＣＰ）的致突变作用以及生物转化Ⅱ相酶的作用。方法测定大鼠外周血双核淋巴细胞微核细胞率及肝组织中总谷胱甘肽硫转移酶（ＧＳＴ）、尿苷二磷酸葡萄糖醛酸转移酶（ＵＤＰＧＴ）、谷氨酰胺转肽酶（γＧＴ）活性。结果猕猴桃汁对ＣＰ诱发的大鼠外周血双核淋巴细胞微核细胞率有显著抑制作用，能明显诱导大鼠肝脏总ＧＳＴ、ＵＤＧＴＰ活性，但对γＧＴ活性无显著影响。大鼠外周血双核淋巴细胞微核细胞率与总ＧＳＴ、ＵＤＧＴＰ活性呈明显负相关。结论猕猴桃汁抗ＣＰ致微核形成作用的机理可能是通过诱导机体外来化合物代谢解毒酶系，加速ＣＰ的代谢灭活     

二甲基亚砜诱导人肝癌细胞BEL-7402凋亡的研究

目的 :研究二甲基亚砜 (DMSO)对人肝癌细胞凋亡的诱导作用。方法 :用不同浓度的DMSO处理体外培养的人肝癌细胞BEL 74 0 2 ,应用普通光镜、荧光显微镜、MTT分析方法和流式细胞技术 (FCM )检测肝癌细胞凋亡的形态学变化、细胞存活率、凋亡百分率和细胞周期分布的变化。结果 :DMSO诱导BEL 74 0 2细胞核DNA凝缩和核片段化 ,最后形成凋亡小体 ;随着DMSO浓度的增加和处理时间的延长 ,细胞存活率明显下降 ,其IC50 为 1.9% ;2 %的DMSO处理细胞 12h ,凋亡率达 17.2 1% ,同时S期细胞明显增加 ,G2 M期细胞明显下降。结论 :DMSO可诱导人肝癌细胞凋亡 ,并使细胞受阻于S期而进入凋亡程序。     

Association of cardiovascular risk factors with pattern of lower limb atherosclerosis in 2659 patients undergoing angioplasty.

OBJECTIVES: Aim of this study is to correlate distribution pattern of lower limb atherosclerosis with cardiovascular risk factor profile of patients with peripheral arterial occlusive disease (PAD). PATIENTS AND METHODS: Analysis is based on a consecutive series of 2659 patients (1583 men, 1076 women, 70+/-11 years) with chronic PAD of atherosclerotic origin undergoing primary endovascular treatment of lower extremity arteries. Pattern of atherosclerosis was grouped into iliac (n=1166), femoropopliteal (n=2151) and infrageniculate (n=888) disease defined according to target lesions treated. A multivariable multinomial logistic regression analysis was performed to assess relation with age, gender and classical cardiovascular risk factors (diabetes mellitus, arterial hypertension, hypercholesterolemia, cigarette smoking) using femoropopliteal disease as reference. RESULTS: Iliac disease was associated with younger age (RRR 0.95 per year of age, 95%-CI 0.94-0.96, p<0.001), male gender (RRR 1.32, 95%-CI 1.09-1.59, p=0.004) and cigarette smoking (RRR 2.02, 95%-CI 1.68-2.42, p<0.001). Infrageniculate disease was associated with higher age (RRR 1.02, 95%-CI 1.01-1.02, p<0.001), male gender (RRR 1.23, 95%-CI 1.06-1.41, p=0.005) and diabetes mellitus (RRR 1.68, 95%-CI 1.47-1.92, p<0.001). Hypercholesterolemia was less prevalent in patients with lesions below the knee (RRR 0.82, 95%-CI 0.71-0.94, p=0.006), whereas no distinct pattern was apparent related to arterial hypertension. CONCLUSION: Clinical phenotype of peripheral atherosclerosis varies with prevalence of cardiovascular risk factors suggesting differences in mechanisms involved in iliac as compared with infrageniculate lesions. Identification of molecular mechanism might have influence on future therapeutic strategies in PAD patients.     

自助餐：精致的“大锅饭”

请客做东的朋友，点菜的时刻也许是他们最煞费心机的时候：一边是担心点的菜没有特色、不好吃而令客人扫兴，一边又怕菜价太高，“钱袋子”不堪负荷。如果不想遭遇这种尴尬，吃自助餐可能是最好的选择。[编者按]     

关于我国体外诊断试剂监督管理改革的建议

本文综述了美国、欧盟、日本、中国目前对体外诊断产品（试剂）监督管理的现状以及我国存在的问题。并根据我国具体情况提出了对体外诊断试剂监督管理的改革建议。     

阿昔洛韦联合胸腺肽抗乙肝病毒疗效观察

本文报道了阿昔洛韦联合胸腺肽对慢性乙型肝炎抗病毒疗效，阿昔洛韦１０ｇ，胸腺肽１６ｍｇ静滴，每日一次，连续治疗２月，共治疗３３例，治疗结束后，治疗组ＨＢｅＡｇ阴转１６例，阴转率５５１７％，ＨＢＶ ＤＮＡ阴转１８例，阴转率５４５４％。对照组ＨＢｅＡｇ阴转率９５２％（２／２５），ＨＢＶ ＤＶＡ阴转率９０９％（１／２５），两组比较有显著性差异（ｐ＜００１），表明阿昔洛韦联合胸腺肽是一种有效、价廉、使用方便的抗乙型肝炎病毒药物。     

保留齿状线加皮桥重建闭合切口治疗环状混合痔32例疗效观察

目的探讨保留齿状线加皮桥重建闭合切口治疗环状混合痔的可行性及疗效。方法治疗组选用保留齿状线加皮桥重建闭合切口32例，与对照组采用传统外剥内扎治疗34例在术后疼痛、水肿、出血、痔残留等并发症及住院时间、愈合时间等方面进行比较。结果治疗组在术后疼痛、水肿、出血、痔残留等及住院时间、愈合时间等方面均优于对照组。结论保留齿状线加皮桥重建闭合切口治疗环状混合痔安全、有效、可行。     

中西医结合治疗急性缺血性中风的临床研究

随着我国社会的日益老龄化，人们生活水平的不断提高和生活方式的改变，中风病的发病率逐年上升，严重危害人类生命与健康，给家庭和社会带来沉重的负担。笔者近二年来，对急性缺血性中风患者100例分别采用中西医结合治疗及单纯西药治疗，并进行了临床观察研究，现将结果报告如下。     

截骨矫形"∩"形钉内固定治疗关节畸形55例

目的探讨肘、膝、踝关节内外翻畸形的治疗方式。方法对55例8～16岁的关节内、外翻畸形患儿(肘关节30例，膝15例，踝10例)，采用肘外侧切口，踝、膝内外侧切口，截骨矫形，1枚或2枚“∩”形钉内崮定治疗，术后石膏托外固定4周，结果随访50例，随访时间3～24个月，截骨均达到骨性愈合，无一例发生感染，内固定松动临床疗效优48例(96％)，良2例(4％)。结论用“∩”形钉作为截骨矫形内固定材料．具有操作简单、损伤小、效果好的优点。     

Recapitulation of fast skeletal muscle development in zebrafish by transgenic expression of GFP under the mylz2 promoter.

A 1,934-bp muscle-specific promoter from the zebrafish mylz2 gene was isolated and characterized by transgenic analysis. By using a series of 5' promoter deletions linked to the green fluorescent protein (gfp) reporter gene, transient transgenic analysis indicated that the strength of promoter activity appeared to correlate to the number of muscle cis-elements in the promoter and that a minimal -77-bp region was sufficient for a relatively strong promoter activity in muscle cells. Stable transgenic lines were obtained from several mylz2-gfp constructs. GFP expression in the 1,934-bp promoter transgenic lines mimicked well the expression pattern of endogenous mylz2 mRNA in both somitic muscle and nonsomitic muscles, including fin, eye, jaw, and gill muscles. An identical pattern of GFP expression, although at a much lower level, was observed from a transgenic line with a shorter 871-bp promoter. Our observation indicates that there is no distinct cis-element for activation of mylz2 in different skeletal muscles. Furthermore, RNA encoding a dominant negative form of cAMP-dependent protein kinase A was injected into mylz2-gfp transgenic embryos and GFP expression was significantly reduced due to an expanded slow muscle development at the expense of GFP-expressing fast muscle. The mylz2-gfp transgene was also transferred into two zebrafish mutants, spadetail and chordino, and several novel phenotypes in muscle development in these mutants were discovered.