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  5. 新型組蛋白酶抑制劑MPT0G013抑制纖維化蛋白表現之機轉探討
 
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新型組蛋白酶抑制劑MPT0G013抑制纖維化蛋白表現之機轉探討

Other Title
Studies on the Inhibitory Mechanism of MPT0G013, a Histone Deacetylase (HDAC) Inhibitor, on Fibrotic Proteins Expression in Human Lung Fibroblasts
Type
thesis
Date Issued
2015-07-21
Author(s)
王裕婷
Advisor
林建煌
陳炳常
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:林建煌
共同指導教授:陳炳常
口試委員:顏茂雄;黃聰龍;許銘仁
中文關鍵字:組蛋白酶抑制劑,結締組織生長因子,轉化生長因子β1,MKP-1,肺纖維化,人類肺部纖維母細胞
英文關鍵字:histone deacetylase inhibitor, connective tissue growth factor, TGF-β1, MKP-1, lung fibrosis, human lung fibroblast
Abstract
研究顯示,在許多纖維化疾病中,例如: idiopathic pulmonary fibrosis (IPF),TGF-β1會刺激肺部纖維母細胞結締組織生長因子(connective tissue growth factor, CTGF)表現。而近年來也有研究指出組蛋白去乙醯化酶(histone deacetylase)在許多纖維化疾病中具有高活性的表現,然而,對於HDAC抑制劑參與肺部纖維化的作用機轉仍不是很清楚。本篇論文將深入探討HDAC抑制劑MPT0G013在TGF-β誘導人類肺部纖維母細胞CTGF表現中所扮演的角色。結果顯示,細胞前處理MPT0G013 (0.01-1 μM) 可以抑制TGF-β誘導人類肺部纖維母細胞(WI-38) CTGF、collagen及α-smooth muscle actin (α-SMA)的表現,而同樣在thrombin、ET-1誘導CTGF的表現也能被抑制。進一步實驗證實以不同濃度MPT0G013 (0.01-1 μM)處理不會影響細胞存活率。此外,MPT0G013可抑制TGF-β所誘導ERK1/2和p38 phosphorylation,但不會影響JNK的磷酸化。亦可以抑制TGF-β所誘導轉錄因子STAT3和Smad3的磷酸化及AP-1、STAT3及Smad3的轉錄活性,但不影響c-jun的磷酸化。另外,我們進一步發現MPT0G013會增加mitogen-activated protein kinase phosphatase (MKP-1)的acetylation。再者,我們也觀察到MKP-1 acetylation可以增加與TGF-β所誘導p38及ERK1/2的結合能力。因此,綜合以上的結果,我們發現在人類肺部纖維母細胞當中,MPT0G013可以藉由增加MKP-1 acetylation來抑制TGF-β誘導的ERK及p38訊息傳遞路徑,進而抑制Smad3、STAT3及AP-1等轉錄活性,導致CTGF表現減少。這些結果顯示G013可以作為發展治療肺部纖維化疾病一個新的治療方針。
URI
https://203.71.86.71/handle/123456789/57177

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