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  1. NTU Theses and Dissertations Repository
  2. 醫學院
  3. 病理學科所
Please use this identifier to cite or link to this item: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79045
Title: BCL11B 模擬蛋白於鼻 NK 細胞淋巴癌誘導 T-bet
BCL11B mimic protein induces T-bet in nasal NK-cell lymphoma
Authors: 王明彥
Ming-Yen Wang
Advisor: 林中梧
Keyword: 鼻NK 細胞淋巴癌,T-bet,BCL11B 鋅指結構域,HLA-G,細胞凋亡,
Nasal NK-cell lymphoma,T-bet,BCL11B zinc finger domains (ZFD),HLA-G,apoptosis.,
Publication Year : 2018
Degree: 碩士
Abstract: 鼻 NK 細胞淋巴癌 (NNL) 是感染 Epstein-Barr 病毒 (EBV) 的侵襲性淋巴癌。 T-bet 是 NK 細胞產生 γ 型干擾素的關鍵轉錄因子。 EBV 編碼的 miR-BART20-5p 抑制了 T-bet 轉譯,同時抑制 p53 並造成 NNL 的侵襲行為。透過全基因 shRNA 文庫篩選,我們篩選出五個 shRNAs可以誘導 T-bet 表現。因此,受 shRNAs 標的的基因可能參與 miR-BART20-5p 抑制 T-bet 的路徑。其中,BCL11B 是一個可能的標的基因並且扮演抑制 T-bet的調節因子,透過與 T-bet 3'-UTR 的交互作用進而抑制 T-bet。我們預估BCL11B 的模擬蛋白可以阻斷 BCL11B 的調節功能並誘導 NNL 的 T-bet 作為治療。
以 BCL11B 鋅指結構域(ZFD)-EGFP 轉染的 YT 細胞可誘導 T-bet 和 p53 的表現。在我們的初步數據中,我們提出 ZFD 做為 NNL 的治療藥物的可能性。在相關文獻中,KIR2DL4 (CD158d) 在 NNL 中具有較高的表現量,而且人類白血球抗原 –G (HLA-G) 為 CD158d 的配體。結合 HLA-G 的 ZFD 可以更有效地誘導 YT 細胞凋亡。除此之外,透過細菌純化的 HLA-G-EGFP-ZFD 蛋白可在較高濃度下誘導 YT 細胞凋亡或壞死。
在進一步的實驗當中,我們將 HLA-G-EGFP-ZFD 的純化蛋白靜脈注射到動物模型中,發現此蛋白具有抑制腫瘤生長的效果。因此,我們預期這些結果的運用將可能開發作為 NNL 的替代治療。
Nasal NK-cell lymphoma (NNL) is an aggressive lymphoma infected with Epstein-Barr virus (EBV). T-bet is a key transcription factor for production of interferon-gamma on NK cells. EBV-encoded miR-BART20-5p inhibits T-bet translation with secondary suppression of p53 and causes an invasive behavior of NNL. By genome-wide shRNA library screening, we identified five shRNAs which could induce T-bet. ShRNAs-targeted genes may engage in the T-bet inhibition pathway triggered by miR-BART20-5p. BCL11B was a potential target gene and it was identified as a regulator to inhibit T-bet via interaction with 3’-UTR. We estimated that a mimic protein of BCL11B could block the regulator function of BCL11B and induce T-bet on NNL as a treatment.
T-bet and p53 were induced on BCL11B zinc finger domains (ZFD)-EGFP transfected YT cells. In the preliminary data, we propose that ZFD might be a therapeutic for NNL. In the relevant literature, KIR2DL4 (CD158d) has higher expression on NNL and human leukocyte antigen -G (HLA-G) was known as CD158d ligand. HLA-G conjugated ZFD can induce YT cells apoptosis more effectively. In addition, HLA-G-EGFP-ZFD protein purified from bacteria can induce apoptosis or necrosis on YT cells under higher concentration.
In the further experiments, we intravenously injected HLA-G-EGFP-ZFD into animal model and the tumor growth was inhibited. It is expected that we could use these results to develop an alternative therapeutic trial for NNL.
URI: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79045
DOI: 10.6342/NTU201803241
Fulltext Rights: 未授權
metadata.dc.date.embargo-lift: 2023-10-11
Appears in Collections:病理學科所

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