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  5. Deoxyelephantopin衍生物抑制人類三陰性乳腺癌之研究
 
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Deoxyelephantopin衍生物抑制人類三陰性乳腺癌之研究

Other Title
Research on Inhibitory Effect of Deoxyelephantopin Derivatives on Human MDA-MB-231 Triple-Negative Breast Cancer Cells
Type
thesis
Date Issued
2014-07-04
Author(s)
陳若羽
Advisor
侯文琪
徐麗芬
Subjects
系所名稱:生藥學研究所
Description
學位別:碩士
語文別:英文
指導教授:侯文琪
共同指導教授:徐麗芬
口試委員:梁有志;蕭培文;李明學
中文關鍵字:三陰性乳腺癌;deoxyelephantopin (DET);衍生物;癌細胞轉移
Abstract
三陰性乳癌(TNBC)為一種高度轉移性乳腺癌,目前化學療法是唯一適用於全身性的治療方式。然而,持續使用化療藥物會產生抗藥性導致治療上的困難。因此,具有生物活性的草藥或其衍生物單獨或與抗癌藥物合併使用也許能提供乳癌患者另一種有效的治療方式。在本研究中,我們從菊科藥用植物地膽草中分離主要活性之化合物deoxyelephantopin (DET),並半有機合成新的衍生物D35,來研究DET與D35對抑制人類三陰性乳癌細胞的效果。藉由體外細胞增生活性檢測、即時攝影、Boyden chamber及免疫組織化學分析,我們發現在MDA-MB-231細胞的遷移、入侵等活動力上,D35比DET有更好的抑制效果(有效劑量降低2~3.6倍)。在體內小鼠肺轉移模型研究中顯示,以D35預處理組的小鼠(preD35-10, 10 mg/kg BW)顯著降低MDA-MB-231細胞轉移到肺的數目達到83% 抑制效果,而DET-10 (10 mg/kg BW)、D35-10 (10 mg/kg BW)和PTX-5 (paclitaxel, 5 mg/kg BW)的抑制效果分別為38%、50%、62%。此外,D35與化療藥PTX交替給藥處理(PTX 5 mg/kg + D35 2 mg/kg BW)並可顯著抑制71% 癌細胞轉移到肺臟組織。流式細胞儀試驗結果顯示,經48小時處理之後,D35、DET可以分別造成21.4%、19.3% 的癌細胞凋亡,而PTX主要造成癌細胞增生停滯於G2/M。而西方墨點與免疫組織化學染色分析結果顯示,證明D35的處理能顯著抑制MDA-MB-231細胞中生物指標蛋白質如VEGF、Ki67、COX-2、E-cadherin、N-cadherin和snail之表現量。綜合目前研究成果顯示,新穎的倍半萜衍生物D35具有進一步發展成為化療藥物之輔助劑或增敏劑的潛力。
URI
https://203.71.86.71/handle/123456789/56710

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