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  5. 含反譯寡核苷酸及化療藥物之固體脂質奈米粒子的製備
 
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含反譯寡核苷酸及化療藥物之固體脂質奈米粒子的製備

Other Title
Preparation of Chemotherapy Agents and Oligonucleotides-Loaded Solid Lipid Nanoparticles
Type
thesis
Date Issued
2013-06-27
Author(s)
李沂瑾
Advisor
邱士娟
Subjects
系所名稱:藥學院生技製藥產業碩士專班
Description
學位別:碩士
語文別:中文
指導教授:邱士娟
共同指導教授:
口試委員:林文貞;廖嘉鴻
中文關鍵字:固態脂質奈米粒子;阿黴素;太平洋紫杉醇;溶劑乳化法
Abstract
  固態脂質奈米粒子(SLN)具有高穩定性、易製備、毒性低等優點,且能保護被乘載的藥物不被降解,故被認為可作為乘載抗腫瘤藥物或治療基因的載體。本研究目標為開發由硬脂酸、DC-Chol、膽固醇及DOPE當作組成,且能同時乘載化療藥物 (阿黴素或太平洋紫杉醇) 及反譯寡核苷酸的奈米載體系統。
  此新型帶正電奈米粒子使用溶劑乳化法製備,先形成包覆化療藥物 (阿黴素或太平洋紫杉醇) 的粒子,分別使用Zetasizer測定粒子大小及表面電荷,阿黴素奈米粒子由stearic acid: cholesterol: DC-Chol: DOPE為43:5:50:2 (w/w)組成,其粒子大小及電荷為273.93±49.30 nm、13.8±2.21 mV,太平洋紫杉醇奈米粒子則由stearic acid: cholesterol: DC-Chol: DOPE為35:5:50:10 (w/w)組成,其粒子大小及電荷為281.73±20.31 nm、26.03±8.41 mV。奈米粒子以穿透式電子顯微鏡觀察可得知為圓球形,藥物的包覆率利用高效液相層析法定量, 阿黴素奈米粒子及太平洋紫杉醇奈米粒子包覆率分別為62%±5%、88%±4%。阿黴素奈米粒子在4ºC環境下,能維持膠體安定性至少達7週。之後將含化療藥物的粒子與反譯寡核苷酸共同震盪,得到同時乘載化療藥物 (阿黴素或太平洋紫杉醇) 及反譯寡核苷酸的奈米載體,並使用凝膠阻滯實驗確認。證明了使用硬脂酸、DC-Chol、膽固醇及DOPE能形成正電性奈米粒子,且此粒子可同時乘載高量的化療藥物 (阿黴素或紫杉醇) 與反譯寡核苷酸。
  在細胞毒性試驗中,將含不同量阿黴素的奈米粒子投予K562及CCRF-CEM細胞,結果發現在K562細胞中,培養48小時後,游離態阿黴素的IC50為729.35±209.75 nM,阿黴素奈米粒子的IC50為329.31±15.85 nM;在CCRF-CEM細胞中,經過24小時培養後,游離態阿黴素的IC50為380.87±29.57 nM,阿黴素奈米粒子的IC50為158.70±15.85 nM,證明以SLN當作阿黴素的載體時,能提高阿黴素低敏感度的K562或阿黴素高敏感的CCRF-CEM對於藥物的敏感度。
  綜合以上,此研究證實帶正電性的固態脂質奈米粒子 (cSLN) 能作為同時乘載親脂性或親水性藥物與反譯寡核苷酸的載體。且發現使用SLN當作載體能提高人類慢性骨髓性白血病細胞K562及人類急性淋巴母細胞白血病細胞CCRF-CEM對阿黴素的敏感性。
URI
https://203.71.86.71/handle/123456789/14066

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