右酮洛芬氨丁三醇对佐剂性关节炎大鼠的治疗作用及胃肠道损伤作用的研究

目的　研究右酮洛芬氨丁三醇 (D KPT)对佐剂性关节炎大鼠的治疗作用及胃肠道损伤作用。方法　采用大鼠佐剂性关节炎模型 ,观察D KPT对佐剂性关节炎大鼠原发和继发性症状的作用以及对前列腺素E2 和胃、十二指肠的影响。结果　D KPT(2 5、5、10mg·kg-1)不仅能抑制佐剂性关节炎大鼠的原发性炎症 ,而且对继发性炎症和多发性关节炎有抑制作用。D KPT(10 -8、10 -7、10 -6 、10 -5、10 -4 mol·L-1)体外对佐剂性关节炎大鼠腹腔巨噬细胞产生过高的PGE2 有抑制作用。D KPT(10mg·kg-1)对胃、十二指肠黏膜有损伤作用 ,但损伤程度小于酮洛芬 (KP) (10mg·kg-1)。结论　D KPT对佐剂性关节炎大鼠有治疗作用 ,同时对胃、十二指肠损伤小于KP。     

脑血通颗粒剂定性定量分析

目的对脑血通颗粒剂进行定性定量分析。方法采用茚三酮、蒽醌定性反应和大黄素、补骨脂素、异补骨脂素薄层色谱鉴别进行定性控制;对补骨脂素、异补骨脂素应用高效液相色谱法定量测定;运用等离子发射光谱仪、氨基酸自动分析仪进行无机元素和氨基酸的测定。结果定性鉴别简便易行;含量测定方法中同分异构体补骨脂素、异补骨脂素分离较好,分离度大于2,补骨脂素、异补骨脂素柱效比较理想,理论塔板数均大于4000。结论此法分离效果好、重现性好、精密度高;元素分析和氨基酸分析结果可信度高,可用于脑血通颗粒剂的质量控制。     

金耳菌丝体多糖降血糖作用研究

目的:研究金耳菌丝体多糖(TMP)的降血糖作用,并对降糖机制进行初步探讨。方法:采用正常小鼠和四氧嘧啶诱导的高血糖大鼠模型,灌胃给药,监测血糖,测定肝糖原、乳酸及脂代谢相应指标。结果:腹腔注射75 mg/(kg·d)剂量的TMP 12 d可降低正常小鼠的血糖水平。以50、100、200 mg/(kg·d)三种剂量灌胃给药7 d,均可显著降低四氧嘧啶致高血糖大鼠的血糖水平,各剂量间无明显差异。连续给予100 mg/(kg·d)TMP 23 d,大鼠血糖得到控制,血糖和血清甘油三酯比对照组显著降低;肝糖原含量、血乳酸水平均与对照无明显差异。结论:TMP可有效降低糖尿病模型鼠的高血糖水平,对高血糖引发的高血脂有一定防护作用。     

前臂内侧神经血管复合体岛状筋膜皮瓣的应用解剖

目的为前臂内侧神经血管复合体岛状筋膜皮瓣的应用提供解剖学基础。方法上肢标本18侧,显微剥离表皮组织,观察前臂内侧皮神经、贵要静脉及各自营养血管的起始、走行、分支、分布及与其它血管的吻合情况;新鲜整尸标本5具,动脉灌注显影剂,剥离体被组织于X光下摄影,分析皮动脉的分布及其与毗邻血管的关系。结果前臂内侧皮神经前支与贵要静脉伴行,两者周围分布着外径大于0.5 mm的营养动脉,平均3.4支,它们分别来自尺侧下副动脉、尺侧返动脉和尺动脉,营养动脉彼此吻合,形成动脉血管链。其中第一支位于肘横纹上21.25±6.33 mm,血管外径1.03±0.24 mm。结论可以在前臂内侧部切取神经血管复合体岛状筋膜皮瓣,供临床使用。     

硬树脂模配戴法对外伤年轻恒牙辅助护髓治疗的有效性研究

目的:研究配戴硬树脂模对外伤年轻恒牙护髓治疗的有效性。方法:对62例外伤致牙体缺损牙髓活力状态敏感的年轻恒牙,随机采用硬树脂模配戴辅助护髓(实验组)和传统方法脱敏治疗(对照组),6个月后检测牙髓活力情况。结果:两种治疗方法经卡方检验分析表明,实验组与对照组存在明显差异(P<0.05)。硬树脂模配戴法临床护髓效果明显优于传统方法。结论:硬树脂模配戴法能显著提高临床护髓成功率,可以在临床推广使用。     

Genotoxicity studies of glycidol fatty acid ester (glycidol linoleate) and glycidol

Glycidol fatty acid esters (GEs) are found in refined edible oils. Safety concerns have been alleged due to the possible release of glycidol (G), an animal carcinogen.     

An exploration of the disease burden due to Cryptosporidium in consumed surface water for sub-Saharan Africa

The protozoan pathogen Cryptosporidium is an important cause of diarrhoeal disease, but in many contexts its burden remains uncertain. The Global Waterborne Pathogen model for Cryptosporidium (GloWPa-Crypto) predicts oocyst concentrations in surface water at 0.5 by 0.5° (longitude by latitude) resolution, allowing us to assess the burden specifically associated with the consumption of contaminated surface water at a large scale. In this study, data produced by the GloWPa-Crypto model were used in a quantitative microbial risk assessment (QMRA) for sub-Saharan Africa, one of the regions most severely affected by diarrhoeal disease. We first estimated the number of people consuming surface water in this region and assessed both direct consumption and consumption from a piped (treated) supply. The disease burden was expressed in disability adjusted life years (DALYs). We estimate an annual number of 4.3 × 10⁷ (95% uncertainty interval [UI] 7.4 × 10⁶–5.4 × 10⁷) cases which represent 1.6 × 10⁶ (95% UI 3.2 × 10⁵–2.3 × 10⁶) DALYs. Relative disease burden (DALYs per 100,000 persons) varies widely, ranging between 1.3 (95% UI 0.1–5.7) for Senegal and 1.0 × 10³ (95% UI 4.2 × 10²–1.4 × 10³) for Eswatini. Countries that carry the highest relative disease burden are primarily located in south and south-east sub-Saharan Africa and are characterised by a relatively high HIV/AIDS prevalence. Direct surface water consumption accounts for the vast majority of cases, but the results also point towards the importance of stable drinking water treatment performance. This is, to our knowledge, the first study to utilise modelled data on pathogen concentrations in a large scale QMRA. It demonstrates the potential value of such data in epidemiological research, particularly regarding disease aetiology.     

内源性VEGF对TMP促进大鼠脊髓损伤修复的影响

目的观察VEGF对TMP治疗大鼠脊髓损伤的影响。方法实验大鼠随机分为假手术组、生理盐水组、 TMP组和TMP+Avastin组,观察术后8周脊髓损伤处VEGF、 vWF和IL-8表达,以及神经纤维再生、后肢运动功能。结果 TMP+Avastin组内源性VEGF表达减少,限制血管新生及炎性反应(P <0.05)。对于神经纤维再生及其后肢运动,TMP组优于生理盐水组(P <0.05), TMP+Avastin组的效果更优(P <0.05)。结论内源性VEGF阻碍了TMP对大鼠脊髓损伤的修复,Avastin通过降低炎性反应提高TMP治疗大鼠脊髓损伤的疗效,促进神经纤维再生及后肢运动功能恢复。