奇奥心血丹滴丸对麻醉犬血流动力学的作用

目的观察奇奥心血丹滴丸对麻醉犬血流动力学的作用.方法3%戊巴比妥钠静脉麻醉,颈总脉插管及左心室插管,测量血压、心率、心输出量、左室内压、左室舒张末压、±dp/dtmax等血流动力学指标.结果奇奥心血丹滴丸可明显降低血压、心率、心输出量、左室内压、±dp/dtmax.结论奇奥心血丹丸具有负性频率、负性肌力及降低血压等作用.     

KD306型耐硫甲烷化催化剂有效扩散系数的测定

基于开发的计算机取样系统,采用ＳＰＳＲ法脉冲动态测试ＫＤ３０６型耐硫甲烷化催化剂的有效扩散系数。线性化和参数估值的结果吻合较好,证实：线性化简化是合理的,参数估值是可用于有效扩散系数。ＫＤ３０６型耐硫甲烷化催化剂的曲折因子为７．２。     

Drug release from reservoir pellets compacted with some excipients of different physical properties

The aim of the present study was to investigate the influence of the size and the porosity of excipient microcrystalline cellulose (MCC) particles on the densification and the deformation during compaction and the consequent effect on the drug release from reservoir pellets. Drug pellets consisting of salicylic acid and microcrystalline cellulose were prepared by extrusion-spheronisation and spray-coated with ethyl cellulose (ethanol solution). Excipient pellets of different size and porosity were prepared by extrusion-spheronisation or direct spheronisation. Five binary mixtures of reservoir pellets and excipient particles were prepared in the proportion 1:7 and lubricated. After compaction the reservoir pellets were retrieved and analysed to determine the intragranular porosity, surface area, shape and drug release. The reservoir pellets were shown to undergo extensive deformation and densification during compaction, resulting in a preserved or even prolonged drug release time. The mode of deformation of the reservoir pellets seems to be critical for the compression-induced change in drug release. Formation of large indents has a negative effect on the release time, while the use of small particles or small deformable agglomerates has a protective effect. We also hypothesize that the coating structure changes during compaction and the final structure of the coating is the net effect of two parallel processes, one reducing and one prolonging the drug transport time across the coating.     

Effect of intragranular porosity on compression behaviour of and drug release from reservoir pellets

In this study, reservoir pellets were prepared and their compression behaviour as well as the importance of their porosity for compression-induced changes in drug release was investigated. Pellets of three different porosities, consisting of microcrystalline cellulose and salicylic acid, were prepared by extrusion–spheronisation and spray-coated with ethyl cellulose (ethanol solution). Lubricated reservoir pellets were compressed and retrieved by deaggregation of the tablets. The retrieved pellets were analysed regarding porosity, thickness, surface area, shape and drug release. It was found that the coating did not significantly affect their compression behaviour. Compaction of pellets of high original porosity considerably affected densification and degree of deformation, whereas the effect on drug release was minor. For low porosity pellets the influence of compaction on drug release was appreciable, but only slight regarding densification and degree of deformation. In conclusion, the porosity of pellets is a potential factor that the formulator can use to optimize drug release and one that can affect the robustness of a formulation during manufacture. Moreover, the coating may be able to adapt to the densification and deformation of the pellets.     

中药浸膏微丸制备研究

目的:制备圆整度好、含药量较高的中药浸膏微丸.方法:用挤出滚圆制粒法制备微丸,并考察微丸的部分物理性质.结果:微丸中浸膏含量达40%,成品收率达80%,微丸物理性能稳定.结论:用挤出滚圆法制备的中药浸膏微丸具有产率高、物理性能优良的特点,挤出滚圆法在中药制粒领域具有巨大的应用潜力.     

不同辅料对通塞脉浸膏粉体物理性质及其微丸成型性的影响研究

目的:初步探讨通塞脉浸膏与不同辅料混合物的物理性质与其微丸成型性的相关性.方法:通过测定不同处方混合物的内聚力、塑性指数及所成微丸粉体学性质,运用主客观赋权法及多元回归分析其相关性.结果:混合物的塑性指数对微丸成型起主要影响,在所考察范嗣内呈正相关,内聚力与微丸成型呈负相关.结论:混合物的物理性质能显著地影响微丸成型.     

三棱丸抑制大鼠子宫内膜异位症血管生成及VEGF,TNF-α表达的研究

目的:考察三棱丸(SLW)抑制子宫内膜异位症(EMS)血管生成作用及机制。方法:以SLW作用于子宫内膜异位症大鼠模型,免疫组化方法检测异位内膜组织中微血管密度(MVD)、血管生成因子VEGF及TNF-α蛋白的表达,RT-PCR方法检测异位组织中VEGF mRNA和TNF-α mRNA的表达。结果:SLW能有效降低MVD,抑制异位内膜组织中VEGF,TNF-α蛋白和mRNA的水平。结论:SLW具有良好的抗EMS血管生成作用,其作用机制与抑制血管生成因子VEGF,TNF-α的水平有关。     

禹余粮丸方考及验案举例

宋赵开美本《伤寒论》88条中提出禹余粮丸,但只见方名,未列药物。后世医家对于该方是否存在以及药味多少争论不一,笔者对此进行了简单的回顾与梳理,并举验案,以供同道参考。     

冰己抑瘤丸对胶质瘤患者化疗敏感性及P21、VEGF表达的影响

目的探讨冰己抑瘤丸对胶质瘤患者化疗敏感性及P21、VEGF表达的影响。方法将90例确诊为神经脑胶质瘤的患者随机分为A组（冰己抑瘤丸＋替莫唑胺）30例、B组（汉防己＋替莫唑胺）30例、C组（安慰剂＋替莫唑胺）30例。对比3组总有效率、化疗敏感率及毒副反应发生率。分析治疗前后3组P21、VEGF表达水平的变化。结果 A组总有效率、化疗敏感率高于B、C组（P〈0.05）,毒副反应发生率低于B、C组（P〈0.05）。A组治疗后P21、VEGF表达水平显著低于B、C组（P〈0.05）。结论冰己抑瘤丸可提高胶质瘤患者化疗敏感性及治疗效果,抑制P21、VEGF表达水平,促进患者预后。     

细辛油的抗炎作用

腹腔注射细辛油0.24 ml/kg对角叉菜胶引起的大鼠足肿胀有抑制作用。此作用在切除肾上腺的大鼠亦能看到。细辛油能降低炎症组织及其渗出液中组胺含量,对组胺或PGE₂引起的大鼠足肿胀有抑制作用,并能对抗组胺或PGE₂引起的毛细血管通透性增加,本品能抑制大鼠胸腔因注射角叉菜胶后引起的白细胞游走;对大鼠棉球肉芽肿有抑制作用,并使胸腺萎缩,还降低正常大鼠肾上腺内维生素C含量。