【摘 要】
:
The main purpose of the present study was to investigate the intestinal absorption activities and hepatoprotective effect of herpetrione nanosuspensions (H1NS).HINS were prepared using pH-dependent di
【机 构】
:
Department of Pharmacy, 302 Military Hospital, Beijing, People's Republic of China; Key Lab of Mode
【出 处】
:
2012转化医学与中药现代化高峰论坛
论文部分内容阅读
The main purpose of the present study was to investigate the intestinal absorption activities and hepatoprotective effect of herpetrione nanosuspensions (H1NS).HINS were prepared using pH-dependent dissolving-precipitating/ homogenization process and then transformed into solid products using lyophilization.The characterizations of HNS were analysized by photon correlation spectroscopy (PCS),scanning electron microscopy (SEM) and X-ray powder diffraction (XRPD).To investigate the intestinal absorption activities of HINS,the in situ intestinal perfusion experimem was performed using the recirculating perfusion technique and make a comparison with herpetrione coarse suspensions (HCS) and pure herpetrione.The protective effect of HNS against acute liver injury induced by carbon tetrachloride (CCl4) in mice was also investigated and compared to that of HCS.The mean particle size of HINS was 269±7 nm with a polydispersity index of 0.187±0.021.The particle size and Zeta potential of HNS did not show significant changes before and after water removal.The result of XRPD indicated that herpetrione was amorphous state in both coarse powder and nanosuspensions.Thein situ intestine perfusion experiments had demonstrated a significant superiority in intestinal absorption activities for HNS compared to the HCS and pure herpetrione.As evidenced by the lower of serum aminotransferase levels and the improvement of the degree of liver lesion,pretreatnent with HNS markedly enhanced the hepatoprotective effect of herpetrione against acute liver injury induced by CCl4 in mice.We could easily conclude that HNS prepared by a high pressure homogenization technique are able to significantly enhance the intestinal absorption activities and the hepatoprotective effect of herpetrione and might have the prospects of development and application.
其他文献
目的:测定不同产地新鲜白术根茎油室直径、油室密度及油室面积占根茎总面积比例(Q值)的大小,探讨显微结构与白术主要成分含量的关系。方法:采用徒手切片的方法制作白术横切面薄片,在显微镜下观察测定白术油室,建立白术鲜药材横截面显微分析方法;同时建立白术高效液相指纹图谱,根据显微结构结果与成分分析结果进行分析比较。结果:油室面积占根茎总面积比例以浙江临安-1与浙江磐安-2较大,磐安-1和台州-2较小;共有
目的:提高口疮散的疗效,制备口疮贴膜并建立质量控制标准.方法:对口疮散进行剂型改进,制成膜剂;用高效液相色谱法对有效成分靛玉红进行含量测定.结果:口疮膜粘附力和溶解试验符合要求;靛玉红在0.5~10.4μg·mL-1内有良好的线性关系,r=0.9999,平均回收率为99.0%,RSD%为1.11%.结论:口疮贴膜制备工艺合理,质量可控;高效液相色谱法测定靛玉红含量,操作快速,定量准确、稳定性好.
本文就日常生活中不良生活方式对高血压病症的影响进行探讨,如情绪因素、吸烟饮酒、高盐摄入、肥胖、饮食习惯、缺乏运动及不能规范用药等。因此,养成良好的生活、饮食习惯,坚持正确的运动锻炼,有助于降低高血压的发病率,也有助于高血压患者的治疗和康复。
目的:为雷公藤甲素治疗乳腺癌的药理作用及临床研究提供理论与实验指导依据,有望找到治疗乳腺癌的新靶点。方法:查阅国内外大量有代表性的论文为依据,总结归纳雷公藤甲素对入乳腺癌细胞的抗肿瘤作用机制研究的相关报道。结果:雷公藤甲素对人乳腺癌细胞的抗肿瘤作用机制主要有:通过诱导细胞周期停滞,抑制肿瘤细胞的增殖;通过调控癌基因、抑癌基因及凋亡调控蛋白的表达、抑制NF-κβ反式激活、激活caspases通路、下
目的:研究热大黄药效与毒性的关系,探索建立中药量-效关系的中药评价研究模式和方法,探讨熟大黄炮制减毒韵客观真实性及其保肝与损肝的“双向”作用.方法:同时采用正常和病理动物,在较大剂量范围(2.0,5.4,14.7,40.0g生药/kg/day)考察熟大黄总提物对实验动物一般状态、生化指标和组织病理的影响,并通过因子分析方法综合分析熟大黄药效与毒性的关系.结果:采用主成分分析法从9个生化指标中抽提出
目的:比较不同产地白术对小鼠小肠推进功能的影响。方法:采用小鼠小肠推进试验,在优化的实验条件下,以墨汁在小肠内推进的距离占小肠的百分比为指标,对不同产地的白术水提液进行药效比较。结果:10种不同产地的白术小肠推进功效差异明显,其中以安徽毫州所产白术小肠推进功能最优。结论:采用小鼠小肠推进试验能够用于评价白术促进小肠推进的作用。
目的:观察怡心健脑颗粒对老年痴呆症(AD)大鼠学习记忆能力的影响,并对其机制进行初步探讨。方法:运用D-半乳糖合β-AP25-35诱导大鼠AD模型,水迷宫法观察怡心健脑颗粒对AD大鼠学习记忆能力的影响,并测定大鼠脑组织中丙二醛(MDA)、超氧化歧化酶(SOD)、乙酰胆碱酯酶(AchE)、过氧化脂质(LPO)的含量;通过制备脑组织切片观测药物对学习记忆障碍大鼠海马组织的影响。结果:与对照组比较,模型
目的:优选并确定银杏叶的最佳提取工艺.方法:采用正交实验法,对乙醇浓度、乙醇用量、提取时间和提取次数4因素进行考察,以提取液中总黄酮和萜类内酯含量,以及浸膏得率为指标,采用综合评分法进行评价,优化银杏叶的乙醇提取工艺.结果:银杏叶醇提工艺各因素对测定结果的影响次序为:提取次数>乙醇浓度>乙醇用量>提取时间,最佳提取工艺为A3B1C1D3,即70%乙醇8倍用量,提取3次,每次1h.结论:该提取工艺合
癌症是人类疾病中的第二杀手,仅次子心脑血管疾病。目前治疗癌症的主要手段是手术治疗,化学药物治疗,放射性治疗,生物治疗,这些方法对癌症的治疗也取得一些较好的效果,但其副反应较0严重,而中医药在这方面可以发挥其独特的优势,如中医的“整体观念”、“辨证论治”。正因为如此,才使大多数的癌症放化疗患者顺利完成了疗程,提高了癌症患者的生存质量和远期疗效。本文就从中医角度来认识癌症放化疗之后的并发症,以及中医药
中药化妆品作为我国特有的一类化妆品,具有十分悠久的历史。本文对中药化妆品的历史渊源、概念、特点和优势进行概述,并介绍了目前国内对中药化妆品研究的进展。同时,指出了中药化妆品的发展瓶颈,提出了一些发展性的建议。