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  2. .TMU Publications / 北醫出版品(教師升等著作 / 教學實踐 / 學位論文)
  3. .博碩士學位論文
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  5. 利用體外及體內研究方式探討維生素E衍生物2,2,5,7,8-methyl-6-hydroxychromane對血管平滑肌 細胞增生之抑制作用
 
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利用體外及體內研究方式探討維生素E衍生物2,2,5,7,8-methyl-6-hydroxychromane對血管平滑肌 細胞增生之抑制作用

Other Title
Inhibition of vascular smooth muscle cell proliferation of vitamin E derivative 2,2,5,7,8-methyl-6-hydroxychromane in an in vitro and in vivo study
Type
thesis
Date Issued
2010-07-01
Author(s)
謝政穎
Advisor
許準榕
Subjects
系所名稱:醫學科學研究所
Description
學位別:博士
語文別:英文
指導教授:許準榕
共同指導教授:蕭哲志
口試委員:顏茂雄;黃德富;楊春茂;林建煌;許銘仁
中文關鍵字:pentamethylhydroxychromane;維生素E衍生物;血管平滑肌細胞;PLC;JAK2;羥基自由基
Abstract
在過去的研究已發現異常增生的血管平滑肌細胞在心血管疾病的病程進行中扮演了重要的角色。本篇論文將探討PMC(2,2,5,7,8-methyl-6-hydroxychromane),這個強效的維生素 E衍生物對血管內膜不正常增生的影響,及深入研究PMC抑制血小板衍生生長因子(PDGF-BB)引發血管平滑肌細胞增生的分子機轉。
實驗結果發現PMC(20和50 ?嵱)明顯抑制PDGF-BB引發的血管平滑肌細胞增生且使細胞週期停止在G2/M期,但並不影響正常狀態下的血管平滑肌細胞。在動物實驗中亦發現PMC (5 mg/kg/day)可顯著減少氣球擴張術所引發之血管內膜增生。在分子機轉探討的實驗中發現,PMC可有效的抑制PDGF-BB引發之STAT3、JAK2、PLCγ1、PKC的活化及ROS的產生,但不影響ERK1 / 2、AKT、或PKC?悛漯穛{。此外,鐵離子螯合劑deferoxamine和PMC一樣,可有效抑制PLCγ1和JAK2的磷酸化,並使細胞週期停滯在G2/M期,而這些抑制效果在給予Fe2 +時會被消除掉。此外,利用電子自旋共振儀偵測,發現PMC可清除Fenton反應和PDGF-BB刺激血管平滑肌細胞所產生的羥基自由基。
本篇論文證實了PMC可經由抑制羥基自由基所引發的PLCγ1-PKCδ和JAK2-STAT3訊息傳遞路徑的活化,而導致細胞週期停滯在G2/M期,進而抑制血管平滑肌細胞增生,此一抑制效果為PMC抑制氣球擴張術引發血管內膜不正常增生之可能機轉。根據研究結果發現,PMC可能是一種具潛力的藥物以治療血管內膜增生相關的疾病。
URI
https://203.71.86.71/handle/123456789/13285

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