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  1. NTU Theses and Dissertations Repository
  2. 生物資源暨農學院
  3. 園藝暨景觀學系
Please use this identifier to cite or link to this item: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/5225
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???org.dspace.app.webui.jsptag.ItemTag.dcfield???ValueLanguage
dc.contributor.advisor許 輔(Fuu Sheu)
dc.contributor.authorYu-Shan Linen
dc.contributor.author林瑜珊zh_TW
dc.date.accessioned2021-05-15T17:53:53Z-
dc.date.available2017-08-25
dc.date.available2021-05-15T17:53:53Z-
dc.date.copyright2014-08-25
dc.date.issued2014
dc.date.submitted2014-07-30
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dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/5225-
dc.description.abstract金針菇免疫調節蛋白 FIP-fve 萃取自金針菇子實體,文獻指出其具有免疫調節、抗癌、抗過敏及減緩發炎反應等功效。二級結構分析顯示,FIP-fve 透過兩個單元體 N 端 α-helix 以疏水性鍵結形成雙元體。本實驗室前人研究指出 FIP-fve 不需經過抗原呈獻細胞修飾,而是透過與 MHC 及 TCR 分子鍵結活化 T 細胞,因此推測FIP-fve 作用方式類似超抗原。本研究目的有二,一為證實雙元體結構對於 FIP-fve 的免疫調節活性是必要的,二為找出 FIP-fve 與 MHC 和 TCR 具交互作用之證據。為探討雙元體結構對 FIP-fve 免疫調節活性之影響,將 1-13 胺基酸缺失或全長 FIP-fve cDNA構築於 pET-32a(+) 載體,並透過大腸桿菌系統表現得分子量皆約 26 kDa 之 His-FIP-fve 1-114 和 His-FIP-fve 14-114 蛋白。以 enterokinase 切除 His-tag 後,經質譜比對確認成功取得 rFIP-fve 1-114 以及 rFIP-fve 14-114。免疫調節活性試驗方面,片段缺失 rFIP-fve 14-114 刺激小鼠脾臟細胞分泌 IFN-γ 能力較 rFIP-fve 1-114 弱,且無法刺激小鼠脾臟細胞 IFN-γ 及 IL-2 基因表現。綜合以上結果,推測失去雙元體結構造成 FIP-fve 免疫調節活性降低。在 FIP-fve 類超抗原性質探討上,透過共同免疫沉澱法可知 FIP-fve 與表面分子 MHC class II 具交互作用,另外發現 FIP-fve 可被 MHC class I 及其 Isotype IgG2a 抗體捕捉。然而,本研究尚未透過共同免疫沉澱法看見 FIP-fve 與 TCR 連結之證據,因此僅能證實 FIP-fve 能連結 APCs 表面分子 MHC class II。zh_TW
dc.description.abstractFIP-fve, an immunomodulatory protein isolated from Flammulina velutipes, has been demonstrated to have activities of immunomodulatory, anti-cancer, anti-allergic and suppression of inflammation. Based on a secondary structure analysis, we known that two FIP-fve monomers form homodimer through the hydrophobic interaction between N-terminal α-helics. Previous studies suggested that FIP-fve can mediate T cells activation through the linkage between T cell receptors (TCR) on T cells and MHC molecules on antigen present cells (APCs) without processing procedure of APCs. This process is similar to the mechanism of superantigen-mediated immune response. The aim of this study was to demonstrate the necessity of dimer structure for FIP-fve immunomodulatory activity and to prove the directly binding of FIP-fve with MHC and TCR. To study the relationship between the dimer structure and immunomodulatory activity of FIP-fve, we constructed the full length 1-114 FIP-fve cDNA and truncated 14-114 FIP-fve cDNA on pET-32a(+) vector and expressed the His-fusion protein His-FIP-fve 1-114 and His-FIP-fve 14-114. After digested by enterokinase to remove the His-tag residue, rFIP-fve 1-114 and rFIP-fve 14-114 were purified with FPLC system. The ability of rFIP-fve 14-114 to stimulate IFN-γ production on murine splenocytes was lower than rFIP-fve 1-114. Incubating murine splenocytes with rFIP-fve 14-114 could not elevate the gene expression of IFN-γ and IL-2. According to the above results, we suggested that the dimerization might be critical for FIP-fve immunomodulatory activity. On the other hand, FIP-fve and RAW 264.7 cell lysate were co-immunoprecipitated to determine superatigen-like characterization of FIP-fve. Results indicated that FIP-fve could interact with MHC class II molecule directly. Interestingly, we also found that FIP-fve was pulled down by both anti-MHC class I antibody and IgG2a which was isotype of anti-MHC class I antibody. However, no co-immunoprecipitated evidence showed that FIP-fve bound with TCR in this study. In conclusion, we proved that FIP-fve directly bind with MHC class II molecule.en
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dc.description.tableofcontents口試委員會審定書 I
致謝 II
摘要 IV
Abstract V
目錄 VII
圖目錄 IX
縮寫表 X
第一章 前人研究 1
第一節 金針菇簡介 1
第二節 其他金針菇成分與功效介紹 2
第三節 金針菇免疫調節蛋白 FIP-fve 簡介 5
第四節 超抗原簡介 10
第二章 研究動機與目的 12
第三章 材料與方法 13
第一節 金針菇免疫調節蛋白 FIP-fve 純化 14
第二節 變性膠體電泳分析 (SDS-PAGE) 17
第三節 蛋白質濕式轉印 19
第四節 西方轉漬法 (western blotting) 20
第五節 重組蛋白 rFIP-fve 1-114 及truncated rFIP-fve 14-114 基因選殖與構築 21
第六節 重組蛋白 rFIP-fve 1-114 及truncated rFIP-fve 14-114 表現與純化 25
第七節 膠體內水解 (In gel digestion) 27
第八節 小鼠脾臟細胞取得 28
第九節 酵素連結免疫吸附分析 (Enzyme-linked immunosorbent assay, ELISA) 30
第十節 細胞總 RNA 抽取與反轉錄 31
第十一節 即時定量聚合酶鏈鎖反應 (Real-time PCR) 32
第十二節 巨噬細胞株 RAW 264.7 細胞培養 34
第十三節 共同免疫沉澱法 (Co-immunoprecipitation) 35
第十四節 統計分析 38
第四章 研究結果 39
第一節 重組蛋白 rFIP-fve 1-114 及 truncated rFIP-fve 14-114 選殖與純化 39
第二節 重組蛋白 rFIP-fve 1-114 及 truncated rFIP-fve 14-114 於小鼠脾臟細胞之免疫活性 42
第三節 以共同免疫沉澱法探討 FIP-fve 之類超抗原特性 43
第五章 討論 46
第一節 重組蛋白 rFIP-fve 1-114 及 truncated rFIP-fve 14-114 蛋白純化探討 46
第二節 片段缺失 truncated rFIP-fve 14-114 蛋白功能探討 47
第三節 FIP- fve 與表面分子親和性之探討 48
第六章 結論與未來展望 51
參考文獻 52
dc.language.isozh-TW
dc.subjectHis 融合蛋白zh_TW
dc.subject免疫調節蛋白zh_TW
dc.subject超抗原zh_TW
dc.subject共同免疫沉澱zh_TW
dc.subject同型雙元體zh_TW
dc.subjecthomodimeren
dc.subjectHis-fusion proteinen
dc.subjectsuperantigenen
dc.subjectimmunomodulatory proteinen
dc.subjectco-immunoprecipitationen
dc.titleFIP-fve 蛋白之 N 端序列對其免疫活性之必要性zh_TW
dc.titleN-terminal of FIP-fve is essential for its immune activityen
dc.typeThesis
dc.date.schoolyear102-2
dc.description.degree碩士
dc.contributor.oralexamcommittee周志輝,潘敏雄,繆希椿
dc.subject.keyword超抗原,His 融合蛋白,同型雙元體,免疫調節蛋白,共同免疫沉澱,zh_TW
dc.subject.keywordsuperantigen,His-fusion protein,homodimer,immunomodulatory protein,co-immunoprecipitation,en
dc.relation.page74
dc.rights.note同意授權(全球公開)
dc.date.accepted2014-07-30
dc.contributor.author-college生物資源暨農學院zh_TW
dc.contributor.author-dept園藝學研究所zh_TW
Appears in Collections:園藝暨景觀學系

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