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  5. 研究登革病毒誘發微小膠細胞運動性
 
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研究登革病毒誘發微小膠細胞運動性

Other Title
Study on Dengue Virus-induced Cell Motility in Microglia
Type
thesis
Date Issued
2016-07-05
Author(s)
詹茗凱
Advisor
林秋烽
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:英文
指導教授:林秋烽
共同指導教授:
口試委員:林宜玲;林良宗
中文關鍵字:登革病毒;微小膠細胞;移行;體外模式;類鐸體受體3;訊息傳遞
英文關鍵字:DENV;Microglia;Migration;In vitro;TLR3;Signaling
Abstract
黃病毒家族中的登革病毒屬於正股單鏈RNA病毒,感染登革病毒時會引起輕微或嚴重的登革疾病。除了登革出血熱或登革休克症,部分登革患者會顯現出神經相關症狀像是急性病毒性腦炎。此外,動物研究及臨床檢體的檢驗均證實在登革病毒感染腦部區域可以觀察到微小膠細胞的活化;然而,目前對於登革病毒感染對於微小膠細胞的影響仍不清楚。實驗室先前的研究發現登革病毒可在體內及體外模式造成微小膠細胞的感染。本論文進一步探討登革病毒感染對微小膠細胞的影響。實驗結果證實四種血清型登革病毒均會造成小鼠微小膠細胞株的感染,包括病毒進入、病毒核糖核酸複製、病毒蛋白表現以及病毒顆粒釋放。登革病毒感染會引起微小膠細胞形成多極表現形態,同時感染並不會造成微小膠細胞生長抑制與細胞毒性。登革病毒感染過後細胞運動能力也會明顯增加。抑制肌動蛋白纖維抑或是網格蛋白,能夠阻礙登革病毒透過調控網格蛋白調節的內吞作用進入細胞所增加的微小膠細胞移行作用。我們進一步發現,利用紫外光抑制登革病毒活性並不會造成細胞移行作用,以及透過藥物方式阻斷類鐸受體3都能減少登革病毒增加的微小膠細胞移行作用。伴隨登革病毒感染類鐸受體3相關訊息傳遞銜接蛋白會活化並驅動細胞移行作用。然而,受登革病毒感染的微小膠細胞所分泌的化學趨化激素也同樣參與在細胞移行作用中。這些研究結果進一步證明登革病毒感染增加微小膠細胞移行作用是透過病毒進入、病毒核糖核酸釋放與類鐸受體3的機制所引起的。
URI
https://203.71.86.71/handle/123456789/57593

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