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  5. 通過奈米金載體修飾替拉扎明(Tirapazamine, TPZ)治療胃癌之臨床前試驗
 
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通過奈米金載體修飾替拉扎明(Tirapazamine, TPZ)治療胃癌之臨床前試驗

Other Title
A Preclinical Trial of Tirapazamine (TPZ) Modified by Gold Nanocarriers on The Treatment of Gastric Cancer
Type
thesis
Date Issued
2023-01-09
Author(s)
Giimel Ajnai
Advisor
張榮善
Subjects
系所名稱:醫學科學研究所博士班
Description
學位別:博士
語文別:英文
口試委員:張嘉哲 Chia-Che Chang​;楊瀅臻 Ying-Chen Yang;麥富德 Mai, Fu-Der;張君照 Chang, Chun-Chao;張榮善 JUNGSHAN CHANG
授權範圍:網際網路,開放日期為2023-01-19
Abstract
腫瘤缺氧是實體瘤的重要標誌之一。它與腫瘤進展有關。然而,它目前已成為癌症治療的新治療靶點。Tirapazamine (TPZ) 是一種實驗性抗癌藥物,僅在非常低的氧氣(缺氧)水平下才會被激活為有毒自由基,這證明了它在癌症治療中的治療價值。在這項研究中,我們首先生成了奈米金粒子 Tirapazamine (GNPs-TPZ) 偶聯物(conjugates),以增強腫瘤靶向性,進而減少副作用。本試驗療效評估是在 MKN45 誘導的異種移植小鼠進行的。結果顯示: TPZ 顯著降低了缺氧的 MKN45 胃癌細胞的生存力,但對含氧量正常的MKN45 胃癌細胞沒有影響其存活。為了提高Tirapazamine藥物腫瘤靶向效率,GNPs 通過偶聯劑牛血清白蛋白 (BSA) 將 TPZ橋接 GNPs。綴合的 GNPs-TPZ 奈米顆粒保留了缺氧細胞毒素的原始特徵,並且還顯示出對 MKN45 異種移植動物的靶缺氧腫瘤具有優異的親和力。此外,使用 TUNEL 測定檢測到腫瘤上的原位 DNA 片段化,表明 GNPs-TPZ 介導了自由基激誘導的 MKN45 腫瘤細胞凋亡。此外,GNPs-TPZ 處理並未顯著改變血液樣本的生化和炎症參數;意味著本實驗室研發的Tirapazamine結合奈米金載體之安全性。總之,BSA 可作為 GNPs 和 TPZ 結合的優良結合劑,這些 GNPs-TPZ 奈米藥物在缺氧腫瘤靶向方面表現出增強的有效性和更好的治療效果,表明它可以作為癌症治療的輔助治療或聯合治療。
URI
https://handle.ncl.edu.tw/11296/rh7h7u
https://203.71.86.71/handle/123456789/10222

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