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  5. 不同化學連接分子鍵結於中孔洞二氧化矽奈米粒子 對Raw 264.7 巨噬細胞之影響
 
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不同化學連接分子鍵結於中孔洞二氧化矽奈米粒子 對Raw 264.7 巨噬細胞之影響

Other Title
Effects of Different Chemical Linkers Conjugated on
Mesoporous Silica Nanoparticles in Raw264.7 Cells
Type
thesis
Date Issued
2013-07-12
Author(s)
陳奕志
Advisor
陳建志
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:英文
指導教授:陳建志
共同指導教授:
口試委員:林天送;周志銘
中文關鍵字:化學連接分子;中孔洞二氧化矽奈米粒子
Abstract
中文摘要
由於中孔洞二氧化矽奈米粒子具有高表面積,孔徑尺寸一致,容易鍵結官能基的
表面特性與良好的生物相容性,因此中孔洞二氧化矽奈米粒子作為一種多功能的
載體在生醫領域的應用上是極具發展潛力的。透過其表面上不同的連接分子,中
孔洞二氧化矽奈米粒子可與各式各樣的物質連接,例如像疏水性抗癌藥物、酵素、
胜肽、siRNA 與螢光染劑等。然而接上不同的連接分子對於中孔洞二氧化矽奈米
粒子的細胞吞噬效果與ROS 的產生是否有影響目前仍不清楚。在本篇研究中,四
種連接分子N-(a-maleimidoacetoxy) succinimide ester (AMAS) 、
m-maleimidobenzoyl-N-hydoxysuccinimide ester (MBS) 、succinimidyl
4-[N-maleimidomethyl] cyclohexane-1-carboxylate (SMCC) 與 maleimide
polyethylene glycol succinimidyl carboxymethyl ester (MAL-PEG-SCM) 分別被接
在奈米粒子表面上的3-Aminopropyl-trimethoxysilane (APTMS)的氨基上。為了觀
察不同的奈米粒子對細胞內活性氧化物(ROS)的產生與其下游的蛋白表現量的
影響, 我們用Raw264.7 老鼠巨噬細胞株作為cell model。經過不同的奈米粒子處
理後,我們用WST-1 assay 分析Raw264.7 細胞的相對生存率。透過流式細胞儀
觀察細胞吞噬效率。用DHE (dihydroethidine) assay 分析細胞內ROS 的相對量。
用西方點墨法觀察p-p38 跟p21 的蛋白表現量。這些實驗的結果顯示了連接分子
對中孔洞二氧化矽奈米粒子的細胞吞噬效果與細胞內活性氧化物的產生都有影
響。可能的原因與奈米粒子的表面電位及連接分子的分子量有關。
URI
https://203.71.86.71/handle/123456789/13933

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