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  5. 血淸素受體對於發育中初級神經細胞NMDA受體表現之影響
 
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血淸素受體對於發育中初級神經細胞NMDA受體表現之影響

Other Title
The Effect of Serotonin Receptor on the Developmental Expression of NMDA Receptor on the Primary Cortical Neuronal Cultures
Type
thesis
Date Issued
2005
Author(s)
顏志瑋
Advisor
葉健全
洪焜隆
Subjects
系所名稱:醫學研究所
碩士論文
Publisher
醫學研究所
Description
條碼號:C0179873、C0173669
Abstract
血清素 (serotonin, 5-HT) 及其受體在神經細胞的許多發育分化過程中扮演很重要的角色。先前的研究曾發現血清素在細胞培養中能促進大腦皮質神經細胞的存活。相較之下麩氨酸受體 (Glutamate receptor) 的亞型N-methyl-D-aspartate (NMDA) 受體在胚胎大腦皮質中表現的時間較晚。因此,NMDA受體的表現有可能會受到血清素及其受體活性之影響。本實驗探討:長期暴露於血清素受體拮抗劑,對大白鼠初級大腦皮質神經細胞中NMDA受體的表現及活性之影響。結果顯示大白鼠初級皮質神經細胞之NR1、NR2A、NR2B等NMDA受體次單元的表現,隨著培養天數而逐漸增加,於第10至20天達到高峰。長時期 (10個培養天) 暴露於高濃度的methysergide maleate (100μM) 或dihydroergocristine mesylate (10μM) 兩種5-HT1及5-HT2的非特異性拮抗劑會導致明顯的細胞毒性。低濃度methysergide maleate (1~10μM) 或dihydroergocristine mesylate (1μM) 則不會產生細胞毒性。長期培養於dihydroergocristine mesylate ( 1μM) 會降低NMDA受體次單元NR1及NR2A的表現量。而細胞長期培養於methysergide maleate (1~10μM)、 dihydroergocristine mesylate (1μM)、5-HT1a 拮抗劑pindolol (1μM) 或 5-HT2A 拮抗劑cyproheptadine hydrochloride (1μM) 會顯著降低細胞對NMDA引發的細胞毒性的敏感度。此結果顯示早期阻斷血清素受體活性可明顯抑制NMDA受體的表現,且此種抑制作用可能包含受體量與質的變化。
URI
https://203.71.86.71/handle/123456789/8468
https://hdl.handle.net/11296/bwyz6n
File(s)
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