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研究生: 李亞宸
Li, Ya-Chen
論文名稱: 雙重響應特性接枝高分子微胞於藥物釋放上之應用
The Application of Graft Polymeric Micelles with Dual Stimuli-Responsive Characteristics in Drug Release
指導教授: 吳文中
Wu, Wen-Chung
學位類別: 碩士
Master
系所名稱: 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年: 2021
畢業學年度: 109
語文別: 中文
論文頁數: 84
中文關鍵詞: 雙親性嵌段共聚高分子 、溫度響應性高分子 、酸鹼響應性高分子 、藥物載體 、藥物釋放 、高分子-藥物結合物
外文關鍵詞: amphiphilic block copolymer polymer, pH-responsive polymer, drug release, drug carrier, temperature responsive polymer, polymer-drug conjugate
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  • 本研究開發出雙親性嵌段共聚高分子 Poly[tert-butyl 7-oxooxepane-4-carboxylate-co-caprolactone]-b-poly[triethylene glycol methacrylate-co-folic acid ] [(PCL-co-PTCL)-b-p(TEGMA-co-FA)](PTFA) 以及[PCL-b-P(TEGMA-co-AHA)](PTAHA),使其作為具有主動標靶能力與環境響應性之藥物載體,並在其高分子側鏈修飾上癌症化療藥物 doxorubicin (DOX),構成高分子-藥物結合物。此共聚高分子在水溶液中自組裝形成微胞後,進一步對其奈米結構、微胞性質、環境響應性與藥物釋放結果進行分析與探討。
    將 poly(ε-caprolactone) (PCL)與經側鏈修飾後 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] (PTCL)共聚作為雙親性高分子微胞的疏水內核,可在內核包覆疏水性藥物 doxorubicin (DOX),亦可同時在高分子側鏈利用醯胺鍵與疏水性藥物 DOX 連接,並以 triethylene glycol methacrylate (TEGMA)與 Folic acid (FA)作為具溫度響應性及酸鹼響應性的親水性外殼,使其具有特定響應功能。藉由調整溫度響應性單體 TEGMA 與酸鹼響應性單體 FA 的聚合度,不但可以調控高分子微胞的最低臨界微胞溫度(lower critical solution temperature, LCST),且可使此臨界溫度在不同酸鹼度下產生變化。為了觀察藥物釋放情形,引入高分子 PCL-b-P(TEGMA-co-PPSEMA) (PTAIE)來製備混合微胞,使最低臨界溶液溫度於酸性環境下低於人體體溫 37 °C,而在中性環境時則高於 37 °C,因此混合微胞能穩定存在於血液循環中並能於細胞溶酶體釋放藥物,並以緩衝溶液來模擬人體血液與溶酶體內之 pH 值來進行藥物釋放行為測試,將其結果做為混合微胞具有作為藥物載體的潛力之依據。

    In this research, we developed an amphiphilic block copolymer (PCL-co-PTCL)-b-p(TEGMA-co-FA) (PTFA) and [PCL-b-P(TEGMA-co-AHA)] (PTAHA) as a drug carrier with the characteristics of active-targeting and environmental responsiveness. The polymer chain was functionalized to conjugate with doxorubicin (DOX) as pendent groups by covalent bond to form polymer-drug conjugates. These copolymers self-assembled into micelles in aqueous solution, and their structure, characteristics, stimuli-responsive properties, and drug release results were further analyzed and discussed.

    The poly(ε-caprolactone) (PCL) and poly[(tert-butyl ε-caprolactone carboxylate)-co-caprolactone] (PTCL) copolymer formed the hydrophobic core of micelles, which can be used for encapsulating with hydrophobic drug, Doxorubicin (DOX), it can also be connected to the hydrophobic drug DOX with an amide bond on the side chain of the polymer. The hydrophilic shell consisted of poly[(triethylene glycol methacrylate)-co-(folic acid)] (p[TEGMA-co-FA]) as temperature-responsive and pH-responsive polymers with promising response for environment.

    By adjusting the degree of polymerization of the temperature-responsive monomer TEGMA and pH-responsive FA moieties, the lower critical solution temperature (LCST) of the polymer micelles can be controlled. To obtain promising responsive properties, another type of polymer, PCL-b-P (TEGMA-co-PPSEMA) (PTAIE), is chosen as one component in mixed micelles, so that the resulting LCST of these mixed micelles was lower than human body temperature in an acidic environment, while in a neutral environment the temperature is higher than 37 °C. The mixed micelles can stably exist in the blood circulation and can release the drugs in the lysosomes. The buffer solution is used to simulate the pH value of human blood and lysosomes for in-vitro drug release study. The result suggests that these mixed micelles possess the potential as drug delivery system with controlled drug release.

    摘要 I Abstract II 誌謝 XIII 目錄 XIV 流程圖目錄 XVIII 表目錄 XIX 圖目錄 XX 公式目錄 XXIII 第一章、緒論 1 1.1研究背景與文獻回顧 1 1.1.1雙親性嵌段共聚高分子 1 1.1.1.1雙親性嵌段共聚高分子於水溶液中之奈米結構 2 1.1.1.2原子轉移自由基聚合反應合成雙親性嵌段共聚高分子 4 1.1.2 功能性高分子 5 1.1.2.1 刺激響應性高分子 5 1.1.2.2 多重響應性高分子 11 1.1.3雙親性嵌段共聚高分子於藥物傳遞之應用 13 1.1.3.1藥物傳遞 15 1.1.4 微胞製備 23 1.2 研究動機與目的 24 第二章、實驗 26 2.1實驗藥品(Chemicals) 26 2.2實驗方法(Experiments) 29 2.2.1單體合成(Synthesis of monomer) 29 2.2.1.1 Hydroxyethl 2-bromoisobutyrate (HEBib) 29 2.2.1.2 N-hydroxysuccinimide methacrylate (NSMA)合成 30 2.2.1.3 4-oxocyclohexanecarboxylic acid (Cy-acid) 31 2.2.1.4 tert-Butyl 4-Ketocyclohexanecarboxylate (Cy-OBu) 31 2.2.1.5 tert-Butyl ε-Caprolactone carboxylate (t-BuCL) 32 2.2.2高分子聚合(Polymerization) 33 2.2.2.1 poly(ε-caprolactone) (PCL) 33 2.2.2.2Poly(ɛ-caprolactone)-b-poly[triethylene glycol methacrylate-co- N-hydroxysuccinimide methacrylate] [PCL-b-P(TEGMA-co-NSMA)] 34 2.2.2.3Poly(ɛ-caprolactone)-b-poly[triethylene glycol methacrylate-co- 6-(methacrylamino)hexanoic acid] [PCL-b-P(TEGMA-co-AHA)] 35 2.2.2.4 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] [PCL-co-PTCL] 35 2.2.2.5 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone]-b-poly[triethylene glycol methacrylate-co-N-hydroxysuccinimide methacrylate ] [(PCL-co-PTCL)-b-p(TEGMA-co-NSMA)] 36 2.2.2.6 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone]-b-poly[triethylene glycol methacrylate-co-N-(2-aminoethyl)pivalamide ] [(PCL-co-PTCL)-b-p(TEGMA-co-EDA)] 37 2.2.2.7 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone]-b-poly[triethylene glycol methacrylate-co-folic acid ] [(PCL-co-PTCL)-b-p(TEGMA-co-FA)] 38 2.2.2.8 Deprotection of Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] 39 2.2.2.9 Deprotected Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] conjugate with doxorubicin 40 2.2.3 微胞製備 40 2.2.4 Lower Critical Solution Temperature, LCST 測試 41 2.2.5臨界微胞濃度(Critical micelle concentration, CMC)檢測 41 2.2.6藥物包覆與釋放 43 2.2.6.1藥物包覆 43 2.2.6.2藥物釋放 44 2.3 儀器鑑定 44 第三章、結果與討論 48 3.1聚合與鑑定 48 3.1.1 2-Hydroxyethl 2-bromoisobutyrate (HEBib)起始劑合成 49 3.1.2 N-hydroxysuccinimide methacrylate (NSMA)合成 49 3.1.3 4-oxocyclohexanecarboxylic acid (Cy-acid)合成 50 3.1.4 tert-Butyl 4-Ketocyclohexanecarboxylate (Cy-OBu)合成 52 3.1.5 tert-Butyl ε-Caprolactone carboxylate (t-BuCL)合成 53 3.1.6 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] [PCL-PTCL]、 poly(ε-caprolactone) (PCL)合成 54 3.1.7 [(PCL-co-PTCL)-b-p(TEGMA-co-NSMA)] (PCTN)、[PCL-b-P(TEGMA-co-NSMA)]合成 56 3.1.8[PCL-b-P(TEGMA-co-AHA)]、[(PCL-co-PTCL)-b-p(TEGMA-co-EDA)]合成 59 3.1.9 Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone]-b-poly[triethylene glycol methacrylate-co-folic acid ] [(PCL-co-PTCL)-b-p(TEGMA-co-FA)] (PTFA) 61 3.1.10 Deprotection of Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] 64 3.1.11 Deprotected Poly[tert-Butyl ε-Caprolactone carboxylate-co-Caprolactone] conjugate with doxorubicin 65 3.2微胞的製備與性質檢測 67 3.2.1溫度響應性 68 3.2.2 CMC性質測試 74 3.2.3藥物包覆 76 3.2.4藥物釋放 77 第四章、結論與未來工作 79 第五章、參考文獻 80

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