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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林立德 | |
dc.contributor.author | Ting-Yuan Hu | en |
dc.contributor.author | 胡庭元 | zh_TW |
dc.date.accessioned | 2021-06-13T00:01:38Z | - |
dc.date.available | 2009-08-28 | |
dc.date.copyright | 2007-08-28 | |
dc.date.issued | 2007 | |
dc.date.submitted | 2007-07-30 | |
dc.identifier.citation | 1.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28143 | - |
dc.description.abstract | 自六O年代以來,鈦金屬根狀人工植體已廣泛應用於全口或局部缺牙病人之重建治療。即使文獻報告顯示出植牙治療可達到相當高的成功率及存活率,然而臨床上仍然會遭遇到各種不同的失敗及併發症,包括植體周圍骨質的吸收及軟組織的萎縮,甚至是完全不形成骨整合。因此,許多現階段研究工作致力於人工植體表面特性的改造,藉以促進形成穩定的植體骨整合。主要的研究方向是針對植體表面形態的改變,例如螺紋的設計、表面的粗糙度、甚至是奈米結構的應用。而在九O年代的晚期,由於對骨癒合過程中分子生物機轉的了解,擬生物策略開始被應用於植體表面特性的改造。然而,關於這方面的研究,目前的進展仍相當有限。其中主要原因之一,是缺乏有效的黏附技術將可以促進植體周圍組織癒合所必需之各種分子接合於植體表面,使其具有各種不同的生物活性與功能。在本研究中,利用噬菌體顯現法篩選具有鈦金屬結合能力的小分子蛋白,作為將具有生物活性之分子接合於植體表面的中介分子。經由此技術,我們成功地分離出一株對鈦金屬表面具有高度親和力的噬菌體-PT3,並利用酵素免疫吸附法確定其結合能力,再將其接合於人類第二型骨形成蛋白(hBMP-2) 之前端並利用原核生物表現系統製造重組蛋白,以應用於日後探討固著於植體表面之生長因子對於周圍組織癒合過程的影響。這個嶄新的策略建立一個有效率而簡易的植體表面黏附技術,提供臨床醫師於植牙手術中,直接置入生長因子於植體表面的可能性。 | zh_TW |
dc.description.abstract | Since the introduction of titanium root-form dental implant in 60’s, it has become a widely used treatment modality in rehabilitation of completely or partially edentulous patients. However, clinicians still face the failure of implant treatment or its complication, such as progressive marginal bone loss, recession of marginal mucosa, or absence of osseointegration, inspite of its reported high success and survival rates in the literatures. In late 90’s, the application of biomimetic modification has been introduced to overcome the problems because of the advances in the understanding of the biology of bone healing process at molecular level. However, there is only marginal success in this field of research after a decade of efforts. One of the obstacles to the success is lack of an efficient and controllable coating methodology to achieve an biologically active surface with diverse function required for the healing process of surrounding tissues. In this study, we identified small adaptor peptides with titanium-binding property with a powerful screening methodology, phage display system. By five rounds of biopanning on Ti-6Al-4V discs, we isolated a clone of phage PT3 with high affinity to the surface of titanium, as verified by ELISA. We also conjugated PT3 at the amino terminus of hBMP-2 and expressed the fusion protein in E.coli. The identity of expressed protein was confirmed with mass spectrophotometry. It was then refolded and purified for further application in evaluation of the effect of immobilized growth factors on the healing process. This novel strategy may offer us a clinically efficient and easy-to-apply coating method in implant treatment. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T00:01:38Z (GMT). No. of bitstreams: 1 ntu-96-P93422002-1.pdf: 6466103 bytes, checksum: 795a0ac5b85edee550b4cf7e2ac4ee40 (MD5) Previous issue date: 2007 | en |
dc.description.tableofcontents | 口試委員會審定書 i
誌謝 ii 摘要 iii ABSTRACT iv INTRODUCTION 1 Current Challenges in Implant Treatment 1 Current Challenges in Implant Treatment 3 Physical Modification of Implant Surface 3 Biomimetic Modication of Implant Surface 7 Healing of Peri-implant Bone 8 Rationale of Biomimetic Modification 11 Modification with Biomimetic Peptides 12 In vitro Study of Using RGD-peptides in Surface Modification 14 In vivo Study of Using RGD-peptides in Surface Modification 17 Current Problems in Functionalization of Implant Surface 19 Using Peptidyl Adaptor to Connect Biological Factor onto Implant Surface 20 Using Phage Display to Identify Material-binding Peptides 21 pIII Protein of Filamentous Phage 23 Using pIII to Display Random Peptide Library 24 Various Libraries Available for Biopanning 25 Steps in Phage Display 26 Study Purpose 28 MATERIALS & METHODS 29 Preparation of Phage Stock 29 Biopanning of T-6Al-4V Discs 30 Phage Titering 32 Characterization of Binding Clones 33 ELISA of PT-3 and PT-7 Phage Clones on Ti-6Al-4V Discs and Titanium Particles 36 ELISA of PT-3 and PT-7 Phage Clones on Various Cell Lines 37 ELISA of PT-3 and PT-7 Phage Clones on U2OS cell line 39 Cloning of human Bone Morphogenetic Protein-2 (hBMP-2) cDNA into Expression Vector 40 Construction of PT3-hBMP-2 for Expression of Fusion Protein 41 Expression of rhBMP-2 and rPT3-hBMP-2 in Prokaryotic System 42 Isolation and Solution of Inclusion Body of rhBMP-2 and rPT3-hBMP-2 43 RESULTS 44 Biopanning on Ti-6Al-4V Discs 44 Characterization of Recovered Clones 46 Binding of PT3 and PT7 Phages to Ti-6Al-4V Discs 48 Binding of PT3 and PT7 to Titanium Particles 49 Binding of PT3 and PT7 phages to Various Cell Lines 51 Expression of rhBMP-2 and rPT3-hBMP-2 in E.coli (BL21) 53 Isolation, Purification, and Renaturation of rhBMP-2 and rPT3-hBMP-2 from the Inclusion Body 54 DISCUSSION 56 CONCLUSION 64 REFERENCES 65 TABLE & FIGURES 78 Table. Summary of Selected Clones 79 Fig. 1. Strategy of Using Phage Display to Functionalize the Surface of Titanium Surface 80 Fig. 2. Biopanning on Ti-6Al-4V Discs 81 Fig. 3. ELISA of Selected Clones Binding to Ti-6Al-4V Discs 82 Fig. 4. Dose-dependent Binding of PT3 and PT7 Phages to Ti-6Al-4V Discs 83 Fig. 5. Dose-dependent Binding of PT3 and PT7 Phages to Titanium Particles 84 Fig. 6. Temporal Change in Binding of PT3 Phages to Titanium Particles 85 Fig. 7. Wide Spectrum of Affinity of PT3 and PT7 Phages to Various Cell Lines 86 Fig. 8. Dose-dependent Binding of PT3 and PT7 Phages to U2-OS Cell Line 87 Fig. 9. Strategy of Construction of PT3-hBMP2 for Expression of Fusion Protein 88 Fig. 10. Cloning of BMP-2 into pET-21a(+) Expression Vector 89 Fig. 11. Construction of PT3-hBMP-2 90 Fig. 12. Induction of rhBMP-2 Expression in BL21 by IPTG 91 Fig. 13. Induction of rPT3-hBMP-2 Expression in BL21 by IPTG 92 Fig. 14. Confirmation of The Identity of Expressed Protein with Mass Spectrophotometry 93 | |
dc.language.iso | en | |
dc.title | 以噬菌體顯現法篩選鈦金屬結合胜肽 | zh_TW |
dc.title | Titanium-binding Peptide Isolated from Phage-displayed Random Peptide Library | en |
dc.type | Thesis | |
dc.date.schoolyear | 95-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 吳漢忠 | |
dc.contributor.oralexamcommittee | 林俊彬,林思洸 | |
dc.subject.keyword | 第二型骨形成蛋白,酵素結合免疫吸附法,植體,噬菌體顯現法,胜肽,庫,鈦,鈦六鋁四釩, | zh_TW |
dc.subject.keyword | bone morphogenetic protein-2,enzyme-linked immunosorbent assay,functionalization,implant,phage display,random peptide library,Ti-6Al-4V,titanium, | en |
dc.relation.page | 92 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2007-07-31 | |
dc.contributor.author-college | 醫學院 | zh_TW |
dc.contributor.author-dept | 臨床牙醫學研究所 | zh_TW |
顯示於系所單位: | 臨床牙醫學研究所 |
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