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  5. 含氟修飾之順鉑藥物於抗腫瘤作用機制之探討與臨床試驗前之評估
 
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含氟修飾之順鉑藥物於抗腫瘤作用機制之探討與臨床試驗前之評估

Other Title
The characterizing and assessments of the modified fluorinated cisplatin analogues on antitumor effects
Type
thesis
Date Issued
2013-06-26
Author(s)
甘慈珺
Advisor
張榮善
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:張榮善
共同指導教授:
口試委員:陳瑞祥;張宏名
中文關鍵字:順鉑;乳癌;大腸直腸癌;抗癌藥物;細胞凋亡;細胞週期
Abstract
順鉑(順一雙氨雙氯鉑),英文商品名為Cisplatin,是常見的化療藥物,適用於多種癌症,包含乳癌、大腸直腸癌和卵巢癌。然而在長期使用下,臨床許多病例出現對順鉑的抗藥性,除此之外,順鉑原本的副作用,例如腎毒性、耳毒性等,也深深影響病患的治療效果與預後,因此,開發新式、具抗癌性的順鉑修飾化合物是目前重要並且迫切的研究議題。
在本研究中所檢測的順鉑修飾化合物(4,4'4F PtCl2)是以順鉑為基底,使用含氟聯吡啶(fluorinated bipyridine)取代原有的胺基(amine group) 結構,此新式藥物針對多種癌症均展現強效細胞毒殺性,甚於傳統的順鉑藥物,尤其以乳癌與大腸癌。實驗裡以順鉑為對照組,比較順鉑修飾化合物的抗癌效果,所測試的腫瘤細胞有MCF-7 (人類乳腺癌)、MDA-MB-231 (人類三重陰性乳腺癌) 和HCT-15 (人類大腸腺癌)三種癌細胞。實驗以流氏細胞儀偵測凋亡試驗與細胞週期,佐以DNA片段電泳,細胞存活不僅以MTT試驗檢視,細胞經由吉姆薩染液染色再次確認,最後動物實驗則以順鉑或順鉑修飾化合物經由靜脈注射或腫瘤內注射,測量腫瘤的生長情況。
結果可知此新合成的順鉑修飾化合物表現強而有力的毒殺特性, MDA-MB-231細胞的IC50為24μΜ,在80μΜ作用下低於10%的細胞存活,約90%的細胞進入凋亡階段。而HCT-15細胞的IC50則是48μM,同樣給予80μΜ藥物後僅有22%細胞存活,接近74%處於晚期凋亡,更重要的是此合成物克服了兩種癌症對順鉑的抗藥性。細胞週期方面,可見週期停頓於subG1和G1階段,不同於已往的順鉑效果會停留在G1/S。In vivo實驗以異體移植小鼠模式建立,順鉑修飾化合物經由靜脈注射不具有治療效果,但是更改給藥途徑為腫瘤內注射後,化合物成功抑制大腸腫瘤的生長,由此一連串實驗證實了化合物對兩種癌症皆擁有抗癌的能力。
本論文所描述的順鉑修飾化合物表現高度潛力於取代傳統順鉑作為臨床治療的替代藥品。未來的實驗以進一步研究此化合物的抗癌分子機制,並與傳統順鉑相互比較,希望能開發新的化療藥物以改善患者的病情結果與預後情況。
URI
https://203.71.86.71/handle/123456789/13904

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