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  5. 碳六十衍生物透過強化的自噬作用對類澱粉蛋白在N2a細胞所引起的毒性具有保護的功效
 
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碳六十衍生物透過強化的自噬作用對類澱粉蛋白在N2a細胞所引起的毒性具有保護的功效

Other Title
Fullerene derivatives protect N2a cells against beta-amyloid induced toxicity through intensified autophagy
Type
thesis
Date Issued
2008-06-30
Author(s)
李啟鳴
Advisor
林俊茂
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:林俊茂
共同指導教授:
口試委員:汪棱芳;黃聲東
中文關鍵字:類澱粉蛋白;阿茲海默症;細胞自噬;碳六十;自由基;己酮可可鹼
Abstract
阿茲海默症(Alzheimer's disease , AD)是一種造成記憶逐漸喪失的神經退化性疾病,也是目前造成失智症最常見的原因。類澱粉蛋白(β-Amyloid peptide, Aβ)即為造成神經細胞毒性的其中一個因素,也是阿茲海默症的一個指標,其原因目前還不完全了解。我們利用在實驗室中所合成的三種碳六十(C60)的衍生物,分別是PTX-C60-1、PTX-C60-2、PEG-C60-3,加上市售的臨床用藥PTX(pentoxifylline),初步的以MTT實驗來觀察,結果發現其中PTX-C60-2以及PEG-C60-3對於類澱粉蛋白所造成N2a細胞的毒性具有顯著的保護功效。更進一步再以西方點墨實驗加以分析,發現PTX-C60-2以及PEG-C60-3能更加促使細胞產生細胞自噬的現象。另外,再以雷射共軛焦顯微鏡以及流式細胞儀加以研究,分別以DHR123、DCFH-DA以及JC1三種螢光染劑來觀察,發現在DHR123和DCFH-DA的染色實驗中,PTX-C60-2、PEG-C60-3以及PTX三種藥物會降低類澱粉蛋白所引發產生的ROS,另外在JC1的染色實驗中,也證實了這三種藥物會減低類澱粉蛋白對細胞中粒線體膜電位的破壞。實驗中PTX擁有最佳降低ROS以及保護粒線體膜電位的能力,卻依然無法達到保護細胞的功效。而PTX-C60-2以及PEG-C60-3這兩個藥物也許在促進細胞自噬的過程中,除了抑制ROS的產生以及保護粒線體膜之外,可能也經由其他尚未釐清的機制,保護了神經細胞。這樣的結果也許在未來能有助於更進一步的藥物研發,改善阿茲海默症的症狀。
URI
https://203.71.86.71/handle/123456789/12641
https://hdl.handle.net/11296/ujuu6c
File(s)
No Thumbnail Available
Name

C0187222.pdf

Size

7.87 MB

Format

Adobe PDF

Checksum

(MD5):476f08389f613bc82da565ec66865d7f

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