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  5. 探討Theissenolactone C 抑制人類單核球細胞基質金屬蛋白 酵素活性表現之作用機制
 
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探討Theissenolactone C 抑制人類單核球細胞基質金屬蛋白 酵素活性表現之作用機制

Other Title
Investigation of Inhibitory Mechanisms of the
Theissenolactone C on Matrix Metalloproteinase-9
Expression in Activated Human Monocytic Cells
Type
thesis
Date Issued
2014-07-02
Author(s)
李昱潔
Advisor
蕭哲志
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:蕭哲志
共同指導教授:
口試委員:陳炳常;顧記華
中文關鍵字:基質金屬蛋白酶敗血症;脂多醣體;單核球
Abstract
循環系統中的單核球,會被聚集到感染或受傷的組織,並分化為巨嗜
細胞及樹突細胞。在許多文獻指出,血液中的單核球當受到外來的刺激時,會分泌許多調節免疫功能的細胞激素 (cytokines) 或引發發炎反應。LPS 會誘發人類單核球細胞產生許多的促發炎介質 (pro-inflammatory)。它們所分泌的細胞激素如:TNF-α、IL-6 及IL-1β 在敗血症 (sepsis) 及慢性感染中扮演重要的角色。這些細胞激素可以提高單核球製造相關發炎酵素(matrix metalloproteinases, MMPs) 並導致嚴重的組織損傷。Theissenolactone C ( 簡稱LC53) 是源自於台灣株炭角菌科(Xylariaceae) Theissenia cinerea。我們發現LC53 在THP-1 細胞中會明顯在二十四小時內減少LPS 所引發的細胞外MMP-9、TNF-α 及IL-1β 的產生。並也具有抑制LPS 誘導的細胞外MMP-9 蛋白及mRNA 的表現。在訊息研究中,LC53 可以阻斷LPS 誘導的IκBα 降解、p65 的轉位及NF-κB 調控的基因報導 (gene reporter) 活性。LC53 也減少了IKKα/β 的磷酸化,而
不會影響到p38 的磷酸化。將microarray 結果利用IPA 資料庫分析,得知經由LC53 處理之後NF-κB 路徑與MMP-9 表現之相關性一致。未來將再評估LC53 在敗血症的活體實驗之療效與潛力。
URI
https://203.71.86.71/handle/123456789/56826

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