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  5. 探討thaliporphine衍生物對於腦缺血離體模式(缺糖、缺氧/再給氧)所引起初代培養大鼠神經細胞死亡之保護作用及機制
 
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探討thaliporphine衍生物對於腦缺血離體模式(缺糖、缺氧/再給氧)所引起初代培養大鼠神經細胞死亡之保護作用及機制

Other Title
Protective effect of thaliporphine derivative on neuronal death induced by glucose-oxygen deprivation/reoxygenation in primary culture of rat brain cells
Type
thesis
Date Issued
2013-07-12
Author(s)
彭康倫
Advisor
王家儀
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:王家儀
共同指導教授:
口試委員:沈芯伃;林惠卿
中文關鍵字:缺氧;缺糖/再給氧;細胞死亡;細胞凋亡;Thaliporphine derivative
Abstract
腦組織缺氧 (hypoxia) 或缺血 (ischemia) 會引發一連串複雜的反應,導致細胞損傷,且已有研究報告指出,在恢復期再給氧反而加重缺氧-缺血性損傷的程度 ;而造成這些神經損傷及退化的一個很大的因素,就是氧化壓力 (oxidative stress)。
Thaliporphine係從五掌楠樟科Neolitsea Konishii所萃取的生物鹼,過去文獻已證實在缺血再灌流的動物模式下有抗氧化的能力,而對心臟缺血/再灌流有保護作用。本計劃設計利用初代培養的大腦皮質細胞為材料,由初生的大鼠腦皮質培養的混和神經/膠質細胞 (神經細胞大約佔40%,星狀膠細胞佔45%,微膠細胞佔15%),評估缺氧、缺糖/再給氧 (Oxygen-Glucose Deprivation/Reoxygenation, OGD/R)對於神經細胞的損傷情形。給予細胞缺氧、缺糖/再給氧 (OGD/R)8小時後再給氧予0、2、4小時,以測量培養液中的乳酸去氫酶 (lactate dehydrogenase, LDH) 的活性,來評估細胞的存活;發現OGD8/R2後細胞存活率明顯下降,而同時給予Thaliporphine衍生物 (TM-1)處理後發現細胞存活率有明顯改善的情形。另外也發現TM-1 (20μM)能夠抑制氧化壓力對於細胞所造成的細胞凋亡情形。TM-1能夠誘發第一型血基質氧化酶 (HO-1)的表現,第一型血基質氧化酶在過去文獻已證實具有抗氧化、抗發炎和抗細胞凋亡的細胞保護的功能,在本
3
實驗中發現到同時給予HO-1活性抑制劑SnPP後,發現到TM-1的抗細胞死亡的細胞保護功能受到抑制,這也顯示TM-1之作用至少部分是透過調控HO-1蛋白質及活性來達到抗細胞氧化及抑制細胞死亡。
URI
https://203.71.86.71/handle/123456789/13940

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