注射用奥沙利铂对比奥沙利铂脂质体Beagle犬的解剖病理学评价

目的:比较注射用奥沙利铂和奥沙利铂脂质体对Beagle犬毒性作用的解剖病理学改变,为抗癌药物脂质体制剂的临床前安全性评价提供重要的形态学参考数据。方法:Beagle犬分为阴性对照组、空载体脂质体组、注射用奥沙利铂组、奥沙利铂脂质体低、高剂量组。静脉滴注每2周给药1次,共4次,恢复期1个月。解剖动物进行组织病理学检查。结果:与脂质体、注射用奥沙利铂和奥沙利铂脂质体相关的组织病理学变化分别为多组织器官的泡沫细胞聚集;睾丸生精细胞数量减少,附睾精子减少症和胸腺、脾脏萎缩;肝脏小肉芽肿,胸腺、脾脏萎缩。结论:通过以上同一抗癌药物不同剂型对Beagle犬的解剖病理学评价比较,为抗癌药物脂质体剂型临床前安全性评价提供了重要的形态学参考数据。     

2011年版《英国药典》概览

目的简要介绍《英国药典》2011年版的基本情况、编排结构。方法分析比较了《英国药典》2011年版和2010年版的不同。结果与结论英国药典委员会每年都对《英国药典》进行更新和修订,值得学习和借鉴。     

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??OBJECTIVE To establish a capillary zone electrophoresis(CZE)-based method for charge heterogeneity analysis of IgG2 monoclonal antibody. METHODS The concentrations of TETA and EACA, pH of separation buffer and temperature of capillary were optimized, to obtain a method which can efficiently separate the charge variants of IgG2 mabs. The reproducibility and repeatability of the optimized CZE method were validated and a battery of mabs were evaluated. RESULTS The separation effect was significantly influenced by TETA/EACA concentration, pH and separation temperature. Through a series of optimization, a CZE method which showed good resolution and precision(RSD of area percentage was below 3.0% was established and the method parameters were as below: 400 mmol??L^-1 EACA/0.05% TETA, pH 6.2, separation under 30 kV voltage at 35 ??. This method was also suitable for IgG1 and IgG4 mabscharge heterogeneity analysis. Based on the specific electrophorogram and migration time, it could also be used as an identification method for monoclonal antibodies. CONCLUSION The optimized CZE method can efficiently separate the charge variants of IgG2 mabs and shows good precision and specificity, which can be used to analyze the charge heterogeneity and identification of monoclonal antibodies.     

Construction of a Dengue NanoLuc Reporter Virus for In Vivo Live Imaging in Mice

Since the first isolation in 1943, the dengue virus (DENV) has spread throughout the world, but effective antiviral drugs or vaccines are still not available. To provide a more stable reporter DENV for vaccine development and antiviral drug screening, we constructed a reporter DENV containing the NanoLuc reporter gene, which was inserted into the 5′ untranslated region and capsid junction region, enabling rapid virus rescue by in vitro ligation. In addition, we established a live imaging mouse model and found that the reporter virus maintained the neurovirulence of prototype DENV before engineering. DENV-4 exhibited dramatically increased neurovirulence following a glycosylation site-defective mutation in the envelope protein. Significant mice mortality with neurological onset symptoms was observed after intracranial infection of wild-type (WT) mice, thus providing a visualization tool for DENV virulence assessment. Using this model, DENV was detected in the intestinal tissues of WT mice after infection, suggesting that intestinal lymphoid tissues play an essential role in DENV pathogenesis.     

可吸收冠脉支架耐疲劳评价体系的研究

目的:建立可吸收支架耐疲劳测试的评价体系,为可吸收冠脉支架的安全性和有效性评价提供测试手段.方法:模拟人体血管内的受力、温度和腐蚀环境,在1.2 Hz频率下,对可吸收冠脉支架进行18662400次脉动的疲劳实验,相当于植入人体6个月.实验结束后对支架的整体情况和微观形态进行观测.结果:支架在疲劳实验后,未出现移位、弯曲...     

The upregulated intestinal folate transporters direct the uptake of ligand-modified nanoparticles for enhanced oral insulin delivery

Transporters are traditionally considered to transport small molecules rather than large-sized nanoparticles due to their small pores. In this study, we demonstrate that the upregulated intestinal transporter (PCFT), which reaches a maximum of 12.3-fold expression in the intestinal epithelial cells of diabetic rats, mediates the uptake of the folic acid-grafted nanoparticles (FNP). Specifically, the upregulated PCFT could exert its function to mediate the endocytosis of FNP and efficiently stimulate the traverse of FNP across enterocytes by the lysosome-evading pathway, Golgi-targeting pathway and basolateral exocytosis, featuring a high oral insulin bioavailability of 14.4% in the diabetic rats. Conversely, in cells with relatively low PCFT expression, the positive surface charge contributes to the cellular uptake of FNP, and FNP are mainly degraded in the lysosomes. Overall, we emphasize that the upregulated intestinal transporters could direct the uptake of ligand-modified nanoparticles by mediating the endocytosis and intracellular trafficking of ligand-modified nanoparticles via the transporter-mediated pathway. This study may also theoretically provide insightful guidelines for the rational design of transporter-targeted nanoparticles to achieve efficient drug delivery in diverse diseases.     

影响体外鼠胚试验标准化的要素分析

不孕症已成为影响人类生殖健康的全球性问题,作为治疗不孕症的一种重要治疗手段,辅助生殖技术经过几十年的发展已经获得长足进步。辅助生殖技术用医疗器械产业快速发展,对此类产品进行风险管理,制定相应的安全性评价检测方法已势在必行。2016年行业标准YY/T 1434-2016《人类体外辅助生殖技术用医疗器械体外鼠胚试验》已经发布,本文就体外鼠胚试验中的关键节点和试验体系要素进行简要综述。     

一种西红花伪品黄花菜的鉴别

目的 :比较研究西红花及新伪制品黄花菜的性状及显微鉴别特征。方法 :采用药材性状和显微鉴别方法 ,参照准确的西红花和黄花菜标本,对西红花的新伪制品黄花菜进行比较研究,找出明显鉴别点。结果:归纳总结出西红花及新伪制品黄花菜的药材性状和显微特征方面的区别。顶端边缘呈不整齐的齿状,内侧有一短裂隙,在凹陷及褶皱处常附着有花粉粒,花粉粒呈黄色或红棕色,呈圆球形,是西红花最主要的性状鉴别点。结论:通过药材性状和显微鉴别可以有效的区别以黄花菜伪制的"西红花",为西红花药材与目前常见伪品的鉴别提供参考。     

兔出血症病毒抗体的实验室检测能力验证结果评价

【摘要】 目的 通过兔出血症病毒抗体检测能力验证计划,了解实验动物检测机构检验能力,提高实验动物质量检测水平。方法 按照CNAS批准的能力验证方案,通过筛选血清制备样品,经过稳定性和均匀性检验合格,作为能力验证样品。采用随机编号,发样给参加单位,并附作业指导书。在规定时限提交检验报告和原始记录复印件,其结果与样品预检结果一致的判为满意结果,不一致或未能提交结果的判为不满意结果。结果 来自14个省市自治区的20个实验室报名参加本次比对实验,均在规定时间内反馈了检测结果,17个实验室检测结果为合格或优秀,占参加比对实验室的85%。在20个实验室中,14个实验室采用了酶联免疫吸附实验（ELISA）方法,6个实验室采用血凝抑制实验（HAI）方法。结论 全国各实验动物检测机构兔出血症病毒抗体总体检测能力较高,实施能力验证计划能够反映实验室的检测水平。