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  5. 探討β-catenin 和 Slug在卵巢癌抗Cisplatin藥性中所扮演之角色
 
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探討β-catenin 和 Slug在卵巢癌抗Cisplatin藥性中所扮演之角色

Other Title
Contribution of β-catenin and Slug to Cisplatin-Resistance of Human Ovarian Cancers
Type
thesis
Date Issued
2015-07-17
Author(s)
張嘉容
Advisor
陳彥州
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:陳彥州
共同指導教授:
口試委員:李哲夫;張榮善
中文關鍵字:卵巢癌;抗藥性
英文關鍵字:Ovarian cancer;drug resistance
Abstract
卵巢癌高居婦科癌症死亡率首位,其五年存活率在近二十年間無顯著改善,和其惡性程度與抗藥性有關;其中,癌症進程關鍵步驟為Epithelial mesenchymal transition (EMT),多篇文獻發現EMT和抗藥性相關。然而,仍未清楚EMT是如何參與在其中。本篇實驗使用兩株卵巢癌細胞株A2780與A2780CP進行試驗。細胞存活率分析實驗與西方墨點法的結果顯示Cisplatin (CDDP)在兩株細胞的細胞毒性有差異,並且對於另一種卵巢癌化療藥物Paclitaxel (Taxol)的細胞毒性是無差異的。之後證實A2780CP比A2780表現有較低的E-cadherin蛋白與較高的N-cadherin和Vimentin蛋白、有較好的球狀形成能力,以及在傷口癒合爬行能力分析與細胞爬行能力有較高的細胞移行能力,顯示A2780CP比A2780具有基質細胞之特性。而兩株細胞在卵巢癌抗CDDP藥性常見之B-cell lymphoma (BCL-2)與Heat shock protein (HSP)家族蛋白量並無差異,在EMT相關基因則發現A2780比A2780CP有較高β-catenin與Slug蛋白以及Message ribonucleic acid (mRNA)表現。以此結果設計細胞轉染實驗,使用細菌質體Deoxyribonucleic acid (DNA)高表現A2780CP的β-catenin或Slug,使用Small interfering ribonucleic acid (siRNA)下調A2780的 β-catenin或Slug表現,之後在蛋白質表現與傷口癒合爬行能力分析證實,兩株細胞在改變原本的β-catenin或Slug表現後,會改變其原本EMT之特性。具有上皮細胞性質的A2780在下調其β-catenin或Slug表現後,細胞會發生EMT;具有基質細胞特性的A2780CP在外加β-catenin或Slug表現後,細胞會發生Mesenchymal epithelial transition (MET)。在細胞存活率分析實驗證實此過程改變CDDP對於其原本的細胞毒性,原本對於CDDP毒性較敏感的A2780轉變為較不敏感,原本對於CDDP毒性有抗性的A2780CP轉變為較敏感。由上述實驗結果證實,β-catenin 與Slug參與在卵巢癌抗CDDP藥性過程中。
URI
https://203.71.86.71/handle/123456789/57197

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