新型生物可吸收聚合物弹簧圈栓塞颅内动脉瘤实验研究

目的: 评价新型生物可吸收聚合物弹簧圈Matrix栓塞犬实验性动脉瘤的长期组织反应和安全性.方法: 6条犬双侧颈总动脉建立12个实验性动脉瘤,一侧6个动脉瘤用Matrix栓塞,另一侧6个动脉瘤为对照.分析栓塞后14 d、1个月和8个月的造影和组织病理学资料.结果: 对照侧动脉瘤一直开通,瘤内无血栓形成,瘤颈无新生内膜覆盖;Matrix栓塞侧动脉瘤尽管并非致密填塞,未观察到再通或破裂;栓塞后14 d瘤腔80%以上的区域形成机化血栓,瘤颈口被薄层新生内膜覆盖.栓塞后1个月瘤腔血栓完全机化,瘤颈新生内膜增厚;栓塞后8个月动脉瘤随瘢痕组织收缩而缩小.结论: Matrix能加速犬实验性动脉瘤纤维化和新生内膜形成而不引起载瘤动脉狭窄或血栓形成;应用Matrix栓塞颅内动脉瘤可能预防再通和改善长期解剖治愈结果,动脉瘤缩小可以减轻占位效应.     

"太白七药"植物群的X射线衍射Fourier指纹图谱鉴别研究

目的应用X射线衍射Fourier指纹图谱法,鉴定陕西独特药用植物群———“太白七药”。方法采用粉末X射线衍射Fourier指纹图谱鉴定法,对陕西独特药用植物群中12个“太白七药”中药材的样品进行实验、分析。结果获得了“太白七药”中的荞麦七、桃儿七、朱砂七、凤尾七、红毛七、纽子七、铁牛七、羊角七、盘龙七、葫芦七、蝎子七、灯台七共12种药材的X射线衍射Fourier指纹图谱。结论粉末X射线衍射Fourier指纹图谱鉴定法可用于“太白七药”植物群中药材的鉴别。     

顺丁烯二酸酐改性环氧二甲基丙烯酸酯的合成与应用

为了合成顺丁烯二酸酐改性的环氧二甲基丙烯酸酯树脂及其物理机械性能。按量取E51环氧树脂、甲基丙烯酸、顺丁烯二酸酐，与催化剂N，N-二甲基苄胺一起进行反应。检测了由合成EAM单体或EMA单体配制复合树脂的压缩强度、径向拉伸强度、表面硬度、固化深度、吸水值和水溶解值。与EMA单体比较，含EAM单体的复合树脂明显增强了压缩强度、径向拉伸强度、表面硬度、固化深度值，降低了吸水值和水溶解值。     

浅谈医用耗材管理（三）基于医用耗材信息管理系统的信息分析

本文介绍了首都医科大学宣武医院医用耗材信息管理系统上线后,通过对从信息系统中采集的数据进行处理和分析,得出有意义的结论。     

不同根管器械用于预备弯曲根管的效果比较

目的比较机用镍钛K锉、手用镍钛K锉、手用不锈钢K锉,在预备弯曲根管时的切削能力和成形能力。方法将30个树脂块弯曲人工根管分为三组,每组10个,分别用镍钛机用K锉、手用镍钛K锉、手用不锈钢K锉预备根管,用光学显微镜观察根管的偏移情况及标本的失重量进行对比分析。结果镍钛机用K锉无根管偏移,手用不锈钢K锉可发生根管偏移。预备后的根尖孔直径镍钛K锉组明显小于不锈钢K锉组(P<001)。结论镍钛器械保持原根管解剖走向的能力优于手用不锈钢K锉。镍钛机用K锉能保持弯曲根管良好的根管形态,建议临床广泛应用。     

Research strategies for safety evaluation of nanomaterials, Part I: evaluating the human health implications of exposure to nanoscale materials.

Nanotechnology has the potential to dramatically improve the effectiveness of a number of existing consumer and industrial products and could have a substantial impact on the development of new products ranging from disease diagnosis and treatment to environmental remediation. The broad range of possible nanotechnology applications could lead to substantive changes in industrial productivity, economic growth, and international trade. A continuing evaluation of the human health implications of exposure to nanoscale materials will be essential before the commercial benefits of these materials can be fully realized. The purpose of this article is to review the human health implications of exposure to nanoscale materials in the context of a toxicological risk evaluation, the current scope of U.S. Federal research on nanoscale materials, and selected toxicological studies associated with nanoscale materials to note emerging research in this area.     

远志属药用植物有效物质群结构特点及其生理活性

系统综述了远志属药用植物有效物质群三萜皂苷、()酮、寡糖酯类成分的结构特点及研究进展,三者作为该属特征性成分,具有广泛的生理活性,作为药用经济植物,该属植物具有广阔的开发前景.     

中药材野生抚育的理论与实践探讨

中药材野生抚育是野生药材采集与家种药材栽培有机结合的一种新兴药材生产方式。作者结合研究现状探讨了中药材野生抚育的概念、特征。中药材野生抚育的基本方式有封禁、人工管理、人工补种、仿野生栽培等。它是一项系统工程技术 ,是中药资源学、生态学、药用植物栽培学、道地药材学等学科的交叉。中药材野生抚育实现了药材生产与生态环境保护的协调发展 ,可以应用于生长条件要求苛刻或家种后质量改变较大等类型药材。文中最后简要分析了几个中药材野生抚育的成功典范 ,并指出中药材野生抚育开辟了中药材生产的生态产业模式 ,具有很好的发展前景 ,需要更多企业介入 ,需要国家加大基础性研究投入。     

经典名方中玄参的本草考证

通过查阅历代本草、医籍、方书及近现代文献资料，对经典名方中所用饴糖的名称、品种、原料及制作工艺进行了考证，为含有饴糖的经典名方开发利用提供依据。经考证可知，饴糖之名历代多源于其形态、质地、制法、原料及产地。古代所用饴糖根据质地不同，主要分为软、硬两类，湿软如蜜者称为“饴”或“胶饴”，质硬色白的则称为“饧”“糖”，现代则多称为麦芽糖，入药仅用胶饴，饧则多作食用；历代药用胶饴推崇糯米（来源于Oryza sativa var. glutinosa）为原料，以大麦Hordeum vulgare制蘖，经过发酵、煎煮、浓缩制备而成，而粟米（来源于Setaria italica var. germanica）、黍Panicum miliaceum等其他谷物为原料制成的饴糖品质次之。2020年版《中华人民共和国药典》未收录饴糖，收载了药用辅料麦芽糖，为纯度较高的结晶粉；但国家食品标准与地方炮制规范中收录了饴糖。基于考证结果，建议经典名方开发中所用胶饴可参考GB/T 20883—2017中的麦芽糖浆，并明确以糯米、大麦为原料。     

Effect of inflammation on endothelial cells induced by poly-L-lactic acid degradation in vitro and in vivo

Abstract

As a promising candidate, biodegradable Poly-L-lactic Acid (PLLA) has been extensively used in coronary artery stents. In our previous reports, PLLA stents implanted in porcine coronary arteries showed safety without stent thrombosis. However, inflammatory responses were observed, which needed further study. In this study, human aortic endothelial cells (HAEC) were treated with different volume percentages of extract of pre-degraded PLLA (extract of PLLA) in vitro, and the cell growth curve and morphological changes were examined. The expression of inflammatory cytokines such as NF-κB, VEGF and VCAM-1 were also observed by ELISA. In addition, PLLA stent was implanted in porcine coronary artery to examine morphological changes, functional marker eNOS and inflammatory responses. The extract of PLLA caused significant growth inhibition and release of NF-κB, VEGF and VCAM-1 in HAEC with volume percentage-dependence. Although re-endothelialization and expression of eNOS was observed, expression of NF-κB and lymphocytes surrounding PLLA were also found after PLLA stents were implanted in the artery. This study demonstrated the effects of inflammation on endothelial cells induced by PLLA degradation in vitro and showed the inflammation in vivo, suggesting that anti-inflammatory strategy is necessary for PLLA stent implantation in the artery.