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  5. 探討營養缺乏於微膠細胞所誘導的訊息傳遞
 
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探討營養缺乏於微膠細胞所誘導的訊息傳遞

Other Title
Signal transduction induced by nutrient-deprivation in microglia
Type
thesis
Date Issued
2015-01-13
Author(s)
吳東晉
Advisor
林琬琬
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:林琬琬
共同指導教授:
口試委員:林滿玉;陳彥州
中文關鍵字:小膠質細胞;缺血性中風;活性氧化物質;漢克斯平衡鹽溶液;腫瘤壞死因子 alpha
英文關鍵字:Microglia;Ischemic stroke;Reactive oxygen species;Tumor necrosis factor alpha
Abstract
小膠質細胞 (Microglia) 為腦部中樞神經系統的重要細胞之一,與巨噬細胞、樹突細胞一樣具有先天免疫的功能,因此其細胞功能的異常與發炎反應密切相關,也在多種腦部病變的疾病中扮演者重要的角色。過去已有不少研究探討中風缺氧對小膠質細胞功能的影響,但甚少了解腦部血流受阻導致養份供應不足對小膠質細胞的影響。因此本研究是利用HBSS (Hank's Balanced Salt Solution) 處理小膠質細胞株BV-2,藉此模擬缺血性中風發生後細胞處於缺乏營養的狀態,探討在此壓力狀態下對細胞存活及發炎相關訊息傳遞路徑的影響。與一般的細胞培養基不同,HBSS 組成中缺乏胺基酸及維生素,而葡萄糖含量 (1 g/L) 也較一般的細胞培養基 (4.5 g/L) 來的低。綜合本論文的實驗結果,HBSS可以誘導細胞ROS的產生使其走向caspase-independent apoptosis。增加的ROS也會影響各種訊息傳遞路徑。ROS增加會導致AMPK的活化,但會抑制ERK;被HBSS活化的Syk 能正調控ERK的活化,而ROS能夠負調控Syk;HBSS能夠誘導TNF- alpha的產生,但此作用會被NAC、Compound C、R406 所減少。這些結果顯示缺乏營養會誘導多種訊息傳遞路徑而導致小膠質細胞產生TNF- alpha及細胞的死亡。
URI
https://203.71.86.71/handle/123456789/57184

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