English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 64745/64745 (100%)
造訪人次 : 20457122      線上人數 : 269
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/6318


    題名: Galectin-1蛋白對細胞生長於幾丁聚醣膜上的影響及調控機制之研究;The study of mechanism of galectin-1 regulates cells proliferation on chitosan membrane
    作者: 張鈺媖;Yu-Ying Chang
    貢獻者: 生命科學研究所
    關鍵詞: 幾丁聚醣膜;Galectin-1;Galectin-1;Chitosan membrane
    日期: 2003-07-04
    上傳時間: 2009-09-22 10:17:30 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 幾丁聚醣是由螃蟹、龍蝦、蝦子這類甲殼類動物外殼中的幾丁質所衍生而來的。在臨床醫學上,幾丁聚醣膜已被使用當作具有半滲透性的生物敷料。雖然幾丁聚醣膜是不具有細胞毒性的,但有些細胞種類 (如: 3T3纖維母細胞)就是無法於幾丁聚醣膜表面進行貼附及增生的作用。近年有許多的研究已指出galectin-1 (Gal-1, 是一種?-半乳糖苷結合的蛋白)對於加速細胞貼附於細胞外基質及誘導細胞的增生而言,扮演重要的角色。因此,在本篇的研究中,我們將探討Gal-1蛋白影響3T3細胞在幾丁聚醣膜上生長的情形。發現當3T3細胞中的Gal-1蛋白被大量表現之下,無法促進細胞生長於幾丁聚醣膜上。然而,將Gal-1蛋白吸附在幾丁聚醣膜上時,則能明顯的加強細胞在幾丁聚醣膜上增生的效率。若處理Gal-1單株抗體及Thiodigalactoside (TDG, lectin的抑制劑),則能抑制Gal-1對細胞增生的影響,此說明了確實是幾丁聚醣膜上所吸附的Gal-1蛋白對細胞的增生所產生的特殊影響。另外,利用免疫標定的方式也偵測到當3T3或CHOA細胞培養在Gal-1吸附的幾丁聚醣膜上時,會明顯的降低細胞內某些蛋白質酪胺酸磷酸化的表現;當使用NaF (絲胺酸/息寧胺酸去磷酸酶抑制劑)處理細胞,NaF明顯的抑制3T3細胞在Gal-1蛋白吸附的幾丁聚醣膜上的增生。此結果表示由Gal-1所誘導的細胞貼附及增生,主要是藉由改變蛋白質磷酸化所產生的訊號傳遞,以進而促進細胞在幾丁聚醣膜上的生長。 Chitosan is a derivative of chitin extracted from the exoskeleton of lobsters, crabs and shrimps. In clinical medicine, chitosan membrane (a tissue-engineered chitin membrane) has been used as a semi-permeable biological dressing. Although the chitosan membranes showed no cytotoxicity, some cell types (e.g. 3T3 cell) were unable to attach and proliferate on the surface of chitosan membrane. A number of studies suggested that galectin-1 (Gal-1, a b-galactoside-binding protein) plays an important role in enhancing the adhesion of cells to extracellular matrix and inducing cell proliferation. Therefore, we here explored the applicability of Gal-1 on enhancing the growth of 3T3 cell on the surface of chitosan membrane. The results showed that over-expression of Gal-1 could not enhance 3T3 cell proliferation on chitosan membrane. However, coating the chitosan membrane with recombinant Gal-1 proteins significantly enhanced the efficiency of 3T3 cell proliferation. However, this effect was inhibited by Gal-1 monoclonal antibody and thiodigalactoside (TDG, a lectin inhibitor), suggesting the specific effect of Gal-1 on the proliferation of 3T3 cell. Moreover, immunoblotting detected a significant reduction in tyrosine phosphorylation of several proteins in 3T3 fibroblast and CHOA cell growing on Gal-1-coated chitosan membrane. The results also showed that NaF (a serine/threonine phosphatase inhibitor) dose-dependently inhibits 3T3 cell proliferation on Gal-1-coated chitosan membrane. These findings support a proposed role for altered levels of protein phosphorylation in Gal-1-mediated cell attachment and proliferation.
    顯示於類別:[生命科學研究所 ] 博碩士論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    0KbUnknown717檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋  - 隱私權政策聲明