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  5. 探討Mcl-1對於HDAC6抑制劑MPT0G211在人類腫瘤中呈現抗癌活性角色
 
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探討Mcl-1對於HDAC6抑制劑MPT0G211在人類腫瘤中呈現抗癌活性角色

Other Title
Characterization of the Role of Mcl-1 in Modulating the Antitumor Activity of MPT0G211, a HDAC6 Inhibitor, in Human Neoplasms
Type
thesis
Date Issued
2023-07-21
Author(s)
施皖曦
Advisor
潘秀玲
Subjects
系所名稱:癌症生物學與藥物研發研究所碩士班
Description
學位別:碩士
語文別:英文
口試委員:潘秀玲 PAN, SHIOW-LIN;皇甫維君 HUANGFU, WEI-CHUN;許凱程 HSU, KAI-CHENG
授權範圍:網際網路,開放日期為2028-07-24
Abstract
MPT0G211是具有專一性的HDAC6抑制劑,目前在乳癌以及急性骨髓性白血病的體外試驗都有抑制癌症或者抑制癌症生長的功效。然而,不同癌症或者同癌別不同的細胞株都對於MPT0G211有不同的敏感程度。因此,若能找到一個生物標記物,將對此藥物有突破性的進展。
在文獻查詢中,我們發現Mcl-1磷酸化與否以及Mcl-1在細胞的重要性對於HDAC抑制劑的效果有重大的影響。因此,我們認為Mcl-1可能是一個好的生物標記物。我們首先蒐集生物資料庫的資料並進行加入MPT0G211後的細胞存活率實驗。結果顯示,在胰臟癌與非小細胞肺癌中,Mcl-1在細胞的重要性與HDAC6抑制劑的效果具有關連性,並且Mcl-1在細胞的重要性可以利用Mcl-1/Bcl-xL蛋白表現比率來進行呈現。
在探討機轉以及Mcl-1在加入MPT0G211後扮演的角色,我們透過西方墨點法偵測蛋白表現量以及免疫共沉澱法研究蛋白與蛋白的交互作用。我們發現高Mcl-1/Bcl-xL蛋白表現比率的胰臟癌與非小細胞肺癌細胞株,會促進Caspase 3 與 PARP裂解,造成細胞凋亡。其機轉為透過GSK3β活化,使得Mcl-1磷酸化,而Mcl-1的磷酸化會促進其泛素化,並且釋放促細胞凋亡蛋白Bim。然而,低Mcl-1/Bcl-xL蛋白表現比率的細胞株,則無法造成GSK3β的活化抑或是增加Caspase 3與PARP的裂解。
綜上所述,Mcl-1/Bcl-xL蛋白表現比率將可以當作是一個生物標記物來預測病人對於MPT0G211的藥物敏感度,這將對未來的藥物發展有很大的進展。

關鍵字:Mcl-1,HDAC6抑制劑,MPT0G211
URI
https://handle.ncl.edu.tw/11296/nhx26e
https://203.71.86.71/handle/123456789/10109

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