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  5. Sorafenib在人類抗原呈現細胞之作用
 
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Sorafenib在人類抗原呈現細胞之作用

Other Title
The effects of sorafenib on human antigen presenting cells
Type
thesis
Date Issued
2013-06-04
Author(s)
林俊昌
Advisor
吳志雄
Subjects
系所名稱:臨床醫學研究所
Description
學位別:博士
語文別:英文
指導教授:吳志雄
共同指導教授:陳裕仁
口試委員:黃偉邦;蔡東湖;廖慧芬;楊育正;李居仁
中文關鍵字:自噬作用;樹突細胞;巨噬細胞;移植
Abstract
背景: Sorafenib是一個多重酪氨酸激活脢抑制劑,被研發出來做為抗癌藥物,目前已被用於治療末期肝癌及腎細胞癌。近年有文獻報告Sorafenib會抑制樹突細胞的功能,但其它關於Sorafenib對免疫系統的影響則很少被探討,本研究探討Sorafenib對樹突細胞和巨噬細胞的影響,並以動物模式來驗證Sorafenib在移植醫學的應用。
實驗方法: 樹突細胞和巨噬細胞是從人類周邊血所分離出的CD14+單核細胞演化而來,細胞的存活率以7-AAD方法測試,細胞表面抗原以流式細胞儀檢驗,細胞產生的自噬作用以電子顯微鏡、免疫螢光染色、西方墨點法、流式細胞儀…等方式來驗證,最後以小鼠皮膚移植的動物模式來檢測Sorafenib對移植物存活時間的影響。細胞培養上清液和小鼠血清中的細胞激素以酵素免疫分析法來檢驗。
實驗結果: Sorafenib會有抑制樹突細胞和巨噬細胞存活的效果,樹突細胞在Sorafenib處理後會偏向不成熟狀態,而Sorafenib在樹突細胞和巨噬細胞都會誘發自噬作用。樹突細胞中之mTOR與p70S6K蛋白表現量會被Sorafenib抑制。巨噬細胞的功能(包括CD80的表現、吞噬能力、製造ROS的能力)都會被Sorafenib抑制,而在動物實驗我們也已發現Sorafenib能延長皮膚移植的存活時間,並且在這些老鼠的脾臟中也發現Sorafenib會增加調節性T淋巴球的比例。若以chloroquine來阻斷自噬作用,則Sorafenib延長移植皮膚存活的效果也會降低。
結論: Sorafenib除了原本的抗癌作用之外,也能透過在樹突細胞和巨噬細胞誘發自噬作用,而有潛力作為移植之後的抗排斥藥。
URI
https://203.71.86.71/handle/123456789/13845

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