| 研究生: |
劉子毓 Liu, Tz-Yu |
|---|---|
| 論文名稱: |
小鼠palladin於肌生成時之啟動子與基因表現分析 Expression Pattern and Promoter Analysis of Murine Palladin in Myogenesis |
| 指導教授: |
王浩文
Wang, Hao-Ven |
| 學位類別: |
碩士 Master |
| 系所名稱: |
生物科學與科技學院 - 生命科學系 Department of Life Sciences |
| 論文出版年: | 2015 |
| 畢業學年度: | 103 |
| 語文別: | 中文 |
| 論文頁數: | 147 |
| 中文關鍵詞: | 肌動蛋白微絲 、啟動子 、小鼠肌原細胞 |
| 外文關鍵詞: | Actin filament, Palladin, promoter, C2C12 |
| 相關次數: | 點閱:113 下載:0 |
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肌動蛋白微絲(actin filament)廣泛存在於各種細胞類型中,參與調控細胞遷移、囊泡運輸、維持細胞形狀、細胞附著與肌肉收縮等運動。目前已知許多微絲結合性蛋白(ABP; Actin-binding protein)會共同調控微絲的組裝與動態,進而影響細胞的機械特性。Palladin是一種微絲關聯蛋白(actin associated protein),基因名稱為Palld,屬於Palladin/Myotilin/Myopalladin家族,並且目前已知的蛋白質產物主要有三種異構型:200 kDa isoform、140 kDa isoform、90-92 kDa isoform,先前研究指出,此三種異構物在不同組織具有不同的表現分布,而本篇主要探討palladin三種異構物在骨骼肌肉生成與分化時的轉錄調控,與個別的表現量和分布。首先我們利用螢火蟲冷光酶系統(luciferase assay)來檢測出可能啟動子區域,並利用PROMO軟體搜尋可能參與調控的轉錄因子。再藉著即時聚合酶連鎖反應(real-time PCR)與西方點墨法(Western blotting),探討Palld gene在RNA與蛋白質階層的表現量,並透過免疫螢光染色技術探討palladin三種異構物在小鼠肌原細胞株(C2C12)中的表現分布位置與其他蛋白質之間的交互關係。透過本篇實驗結果,在palladin於骨骼肌肉細胞發育與分化上所扮演的角色提供了一些重要資訊,但未來還需透過更進一步的研究探討,找出更詳細的調控機制,並釐清palladin三種異構物於肌肉生成過程所扮演的角色。
Palladin, one of palladin/myotilin/myopalladin family, characterize and identified in 2000, is a scaffold protein involved in the formation of actin-associated protein complex which plays an important role in the cell movement and adhesion. Members in this family share similar structure and all related in actin cytoskeleton regulation. At least three isoforms of palladin, 200 kDa, 140 kDa and 90 kDa, has been identified, each of them had been found some different expression level in different tissue. However, it remains unclear the role of palladin in skeletal muscle differentiation. The main aim of this study is to identify the promoter region and the expression pattern of these three isoforms and the relation to the differentiation of murine skeletal muscle C2C12 myoblast. First, we cloned the possible promoter regions to measure the promoter activity by utilizing of luciferase assay system, then used online program to search putative transcription factor binding sites. Next, we investigated endogenous mRNA and protein expression level of these three palladin isoforms by real-time PCR and Western blotting. Furthermore, we used the Immunofluoresence staining to study the expression pattern and the relationship of palladin isoforms and other proteins, like integrin β1, vinculin, actin and α-actinin. We hope the research results in this study will provide more information in physiological, skeletal muscle development and disease studies in the future.
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校內:2020-02-12公開