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  5. 合成聯苯基化合物及胺基嘌呤化合物作為抗癌試劑
 
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合成聯苯基化合物及胺基嘌呤化合物作為抗癌試劑

Other Title
Synthesis of Biaryl Compounds and Aminopurines as Anticancer Agents
Type
thesis
Date Issued
2016-06-30
Author(s)
趙育萱
Advisor
劉景平
Subjects
系所名稱:藥學系(碩博士班)
Description
學位別:碩士
語文別:英文
指導教授:劉景平
共同指導教授:
口試委員:葉燈光;陳繼明
中文關鍵字:標靶藥物;組蛋白去乙醯酶6;熱休克蛋白70
英文關鍵字:histone deacetylase 6;heat shock protein 70
Abstract
癌症是一系列具有相似特性之疾病總稱,源自於過度繁生並會轉移侵略其他組織的突變細胞。癌症目前在全世界及臺灣均名列十大常見死因前三名。針對癌症有許多治療方針,其中以化學治療最為常見,被廣泛應用於各類型癌症的不同治療階段。然而,癌症化學治療有幾項顯著缺點:首先,化療製劑具有強烈細胞毒性,能引起不同程度的副作用;再者,近年的學術研究及臨床觀察皆發現多種癌症具有化療抗藥性。因此,研究新的治療方法乃是勢在必行,並主要以標靶藥物為發展重心。
有鑑於此,本論文旨在設計以組蛋白去乙醯酶6 (histone deacetylase 6, HDAC6)及熱休克蛋白70 (heat shock protein 70, HSP70)為標靶的新穎小分子抑制劑。共計合成31個小分子化合物並交由合作實驗室進行生物活性試驗,測定其半數生長抑制濃度(the concentration to cause 50% tumor cell growth inhibition, GI50, μM)作為主要實驗結果指標。
化合物 8a-k、9a-h 以及 10a-e 為針對組蛋白去乙醯酶6所設計的抑制劑,以喹?翮l生物MPT0G211 (7a) 作為模板進行官能基取代研究。其中,化合物8b 對人類非小細胞肺癌細胞株A549 (GI50 = 1.29 ± 0.41 μM) 及人類大腸癌細胞株HCT116 (GI50 = 1.61 ± 0.22 μM) 具有最佳生物活性。構效關係研究顯示,於喹??3號位進行間位雜環取代能提升喹?翮l生物MPT0G211 (7a)之生物活性。反之,喹?羲甄X環或縮環則會減少其抗癌活性。
化合物 32a-k、33 以及 34 為針對熱休克蛋白70所設計的抑制劑。本實驗以具熱休克蛋白70選擇性的三磷酸腺苷類似物VER150008 (31)作為模板進行結構修飾,以期提升化合物類藥性並保留其抗癌活性。其中,化合物32c 對人類大腸癌細胞株HCT116 (GI50 = 6.89 ± 0.75 μM) 具有最佳生物活性。構效關係研究顯示,於嘌呤核心結構2、6及9號位僅特定修飾組合能保留原本的生物活性。另外,化合物32a ,經活性試驗及西方點墨法分析證實,在相同濃度下(32 μM)抑制致癌蛋白(oncoprotein)效果優於VER150008 (31)。
URI
https://203.71.86.71/handle/123456789/57669

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