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  5. 整合素 β3 控制細胞核內類胰島素成長因子受體調節癌幹細胞特性
 
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整合素 β3 控制細胞核內類胰島素成長因子受體調節癌幹細胞特性

Other Title
Integrin β3-regulated IGF-1R Nuclear Translocation Promotes Cancer Stemness-related Properties
Type
thesis
Date Issued
2017-06-22
Author(s)
甄沛勤
Advisor
黃彥華
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:黃彥華
口試委員:林秋烽;張德生
中文關鍵字:核內類胰島素成長因子受器;整合素 β3;癌幹細胞特性
英文關鍵字:IGF-1R;nuclear IGF-1R;integrin β3;cancer stemness
Abstract
IGF-1/IGF-1R 訊號已經被證實在幹細胞以及癌幹細胞中,扮演著維持幹細胞特性的重要角色。同時,IGF-1R 也在近年來被發現出現在細胞核內,有作為轉錄因子的功能。研究也指出 integrin β3 可以藉由與 IGF-1/IGF-1R 形成一個異質聚合體,調控 IGF-1R 的活化以及下游訊號傳遞。在本論文中,我們將探討 integrin β3 如何調控 IGF-1R 進入到核內,且核內的 IGF-1R 是如何調控癌幹細胞特性的產生。我們發現,IGF-1R 在接受野生型受質 IGF-1 (WT) 刺激後,p-IGF-1R 會進入到核內。而無法與 integrin β3 鍵結之突變型 IGF-1 (MT),由於抑制了 IGF-1R 活化,則完全無法引起活化的 p-IGF-1R 進入到核內,這說明了 integrin β3/IGF-1/IGF-1R 可能參與 p-IGF-1R 進入到核內的機制。進一步的研究中,我們發現將 integrin β3 自細胞中剔除反而能夠促進 p-IGF-1R 入核。在 B 型肝炎導致的肝癌腫瘤檢體中,我們在細胞核中發現高度表現的 p-IGF-1R,且其高表現量和癌幹細胞重要因子 OCT4 之高表現量以及病人較不良之癒後呈現正相關。總結而言,我們發現 integrin β3 能夠調節 p-IGF-1R 進入細胞核,以及核內 p-IGF-1R 和癌幹細胞特性呈現高度的相關性。
URI
https://203.71.86.71/handle/123456789/57910

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