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  5. 人類乙型淋巴毒素受體活化調控RANTES之基因表現
 
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人類乙型淋巴毒素受體活化調控RANTES之基因表現

Other Title
Regulation of RANTES Gene Expression by Human Lymphotoxin beta Receptor activation
Type
thesis
Date Issued
2010-07-21
Author(s)
呂佳容
Advisor
陳玫潔
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:陳玫潔
共同指導教授:
口試委員:陳念榮;陳炳常
中文關鍵字:人類乙型淋巴毒素受體
Abstract
人類乙型淋巴毒素接受器 (LT-βR)為腫瘤壞死因子接受器 (TNFR)家族的一員,在二級淋巴組織的發育、宿主防禦、趨化激素分泌、細胞凋亡等反應中扮演重要的角色。先前研究顯示當LT-βR活化時,會誘發趨化激素RANTES的分泌,但是其中的調控機制及訊息傳遞路徑,目前仍不是非常清楚。而在此我們證實在人類肺部上皮細胞中,LT-βR活化後,會誘發RANTES分泌。利用三種MAPK抑制劑來抑制LT-βR誘導的訊息傳遞,發現JNK、ERK MAPK活化途徑較為重要。另外,利用ASK1、TAK1、MEKK1的dominant negative突變質體轉染,發現ASK1、TAK1、MEKK1皆會參與LT-βR活化誘發RANTES基因表現。此外,藉由TRAF2、3、5的dominant negative突變質體轉染,發現TRAF2、3、5皆會參與LT-βR活化誘發RANTES基因表現,不論是在RANTES蛋白質分泌以及活化RANTES promoter層級皆得到相同證實。利用Chromatin Immunoprecipitation證實轉錄因子CREB複合體及NF-?羠會參與LT-βR活化所誘發RANTES分泌的提升。因此我們確定LT-βR訊息傳遞會經由TRAF2、3、5,進而活化ASK1、TAK1、MEKK1的路徑以調節活化JNK、ERK MAPK途徑,進而使得轉錄因子CREB複合體、NF-?羠結合至RANTES promoter,啟始RANTES基因表現,造成RANTES分泌增加。
URI
https://203.71.86.71/handle/123456789/13223

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