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  5. 兩性藥品促進矽奈米沉降之作用機制與性質研究
 
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兩性藥品促進矽奈米沉降之作用機制與性質研究

Other Title
Amphiphilic Drugs Facilitate Silica Nanoprecipitation: a Mechanistic and Characterization Study
Type
thesis
Date Issued
2015-06-17
Author(s)
林千玉
Advisor
邱士娟
胡德民
Subjects
系所名稱:藥學系(碩博士班)
Description
學位別:碩士
語文別:中文
指導教授:邱士娟
共同指導教授:胡德民
口試委員:方嘉佑;何秀娥;廖嘉鴻
中文關鍵字:矽奈米粒;兩性藥品;奈米沉澱法
英文關鍵字:silica nanoparticles;amphiphilic drugs;nanoprecipitation
Abstract
矽奈米粒 (SiNPs) 作為奈米藥物遞送系統 (NanoDDS) 已經有許多的研究。在本實驗室過去的研究中,發展出以奈米沉澱法為基礎,製備SiNPs的新方法,該方法稱為silica ouzo effect。利用酸催化矽源於有機相中的水解和縮合反應,將有機相加入水中直接生成SiNPs,不需高剪切能量和界面活性劑,即可簡單地製備帶有官能基的SiNPs。在現今所使用的藥品中,兩性藥物同時具有親水和疏水的結構特性,與界面活性劑有相似的行為,在溶液中傾向於發生聚集,並可產生疏水和靜電作用力,常探討它們與界面活性劑,聚合物和生物膜的相互作用,以及促進聚合物載體生成。
本研究將探討含胺基兩性藥品是否具有促進矽奈米沉降和穩定粒子的能力,以及藉由藥物兩性性質和胺基所提供之正電,了解含硫醇基的矽源 (MPTMS) 形成矽奈米粒之作用機制與性質。以不同治療類別的十二種兩性藥品進行製備,結果顯示所有兩性藥品對於生成和穩定矽奈米粒的能力與濃度具相關性。為了系統性比較藥物間對促進矽奈米沉澱能力的差異,我們以AUC和CSC作為評估兩性藥物促進矽奈米粒沉降與穩定的能力指標,較高的AUC或較低CSC,具有更佳形成穩定矽奈米粒的能力。值得注意的是,這兩個指數與藥物本身的疏水性 (log P) 和兩性 (CMC) 性質有高度相關性;並藉由調控各項條件,我們推論出靜電作用力為兩性藥物影響矽奈米粒形成的重要機制。整體而言,兩性藥物皆可促進MPTMS矽奈米的沉澱,作用機制主要藉由兩性藥物的疏水性 (log P) 和胺基與矽源間的靜電作用力,進而影響粒子的生成與安定性。
URI
https://203.71.86.71/handle/123456789/57307

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