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  5. 抗藥性B型肝炎相關肝細胞癌之訊息傳遞變異之探討
 
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抗藥性B型肝炎相關肝細胞癌之訊息傳遞變異之探討

Other Title
Investigation of Signal Transduction Variation in Drug Resistant HBV-related Hepatocellular Carcinoma
Type
thesis
Date Issued
2018-07-05
Author(s)
滕民豪
Advisor
鄭可大
黃彥華
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:鄭可大
共同指導教授:黃彥華
口試委員:楊慕華;劉昉;張德生
中文關鍵字:肝癌;抗藥性Sorafenib;X配體/ X受體;單細胞群落細胞
英文關鍵字:HCC;Sorafenib resistance;X ligand/ phosphorylation X receptor;single cell colony
Abstract
肝癌是全球第六大常見的癌症,肝癌的罹患及致死率有地域性的差異,其中超過80%的病例發生在東亞及非洲等地區。Sorafenib是一種口服多激酶抑制劑,通過抑制RTKs作用於VEGF以及PDGFR-β抑制腫瘤細胞增殖和抗血管生成。儘管Sorafenib被證明改善總體生存,但對於晚期HCC病患平均只延長3個月的生存率,且大多數病患會產生抗藥性。因此,我們建立了Sorafenib-resistant細胞株,並確認其對於Sorafenib容忍度高於Sorafenib-naive細胞株,且顯著表達EMT相關表面標記物、基因與蛋白。同時也藉由X配體所誘導的TKs磷酸化機制,確認Sorafenib-resistant HCC確實對於Sorafenib產生抗藥性,然而卻發現磷酸化X受體表現量未受到抑制外反而明顯增加。因此我們為了使表達量穩定且一致,更進一步採取single cell colony培養的方式,建立HCC single cell colony細胞株。在Sorafenib-resistant HCC single cell colony細胞中,同樣觀察到酸化X受體表現量並未受到Sorafenib抑制且明顯增加,且有趣的是酸化X受體表達量似乎在細胞核內表達較多。最後,利用酸化X受體抑制劑L結合Sorafenib的方式確實有效增加抗藥性細胞株對於Sorafenib的敏感性。藉由上述發現,我們也將在後續進一步分析轉錄體定序、基因突變位點以及表觀遺傳之變化。在本篇論文研究中,我們發現Sorafenib確實有效抑制Sorafenib-resistant HCC細胞中MAPK以及AKT路徑。但卻因為後天性抗藥驅動突變,導致酸化X受體表達量增加,並可能藉由此機制誘發其他路徑的訊息傳遞開啟,降低對Sorafenib的敏感性而從中存活下來。
URI
https://203.71.86.71/handle/123456789/58281

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