 |
English
|
正體中文
|
简体中文
|
全文筆數/總筆數 : 45422/58598 (78%)
造訪人次 : 2530225
線上人數 : 225
|
|
|
資料載入中.....
|
請使用永久網址來引用或連結此文件:
http://libir.tmu.edu.tw/handle/987654321/59454
|
| 題名: | Steviol衍生物之合成與其細胞毒性之探討
Synthesis and Cytotoxic Effects of Steviol Derivatives |
| 作者: | 王信凱
Wang, Sin-Kai |
| 貢獻者: | 黃偉展 |
| 關鍵詞: | Steviol;細胞毒性
Steviol;cytotoxicity |
| 日期: | 2015-07-09 |
| 上傳時間: | 2020-08-28 14:30:34 (UTC+8) |
| 摘要: | 本研究以天然物-甜菊(Stevia rebaudiana)葉部的抽取物stevioside為原料進行一系列化學結構修飾與活性關係之研究。Stevioside經不同化學方法處理下可獲得兩種主產物: isosteviol與steviol，匯整近幾年來相關抗癌文獻已證實steviol衍生物較isosteviol衍生物容易提升抗癌細胞之毒性，故以steviol作為修飾起始物。三種有利於活性提升的結構片段(enone 結構、疏水性碳氫短鏈 和cinnamic acid結構)分別修飾於D環和C19位置形成cinnamoylation 衍生物之模板，並於cinnamic acid之苯環結構上不同位置以不同基團(甲基、甲氧基、羥基和乙醯氧基)作為取代基所合成的25個系列化合物，包含200~210 (STD-3~13)、213~219 (STD-15~21)和221~227 (STD-23~29)。另一方面亦於steviol C19位置經amination反應，合成出228 (STD-30)、229 (STD-31)和232 (STD-34) 3個amide化合物。
細胞之活性測試方面，以SRB assay和MTT assay評估35個steviol衍生物於PC-3、HCT-116和A549癌細胞株的細胞毒性。結果顯示化合物223 (STD-25)為cinnamoylation衍生物中對PC-3毒性最佳者(IC50=1.38 μM)，而雜環化合物230 (STD-32, IC50=0.55 μM)與amide衍生物228 (STD-30, IC50=0.46 μM)則表現出更優異的活性；碘化合物211 (STD-14, IC50=1.99 μM)於HCT116之活性皆比cinnamoylation衍生物與amide衍生物佳；另一方面，本研究設計之化合物對於A549的靈敏性不佳，無法進一步作探討。所合成之化合物對不同細胞株呈現顯著差異之細胞毒性，其藥理作用機轉不明，有待後續之探討。
整體而言，Amide衍生物228 (STD-30)於PC-3和HCT116兩細胞株皆展現出優越的細胞毒性，為本研究中最具潛力性衍生物，值得進一步做藥理機轉之研究。
Stevioside extracted from the leave of natural product, Stevia rebaudiana, was used as crude material to synthesize its derivatives and further discuss the structure-activity relationship. Isosteviol and steviol are the two main products obtained from various methodology and the latter one was reported to possess more pronounced effectiveness in anticancer activity than isosteviol derivatives against tumor cell lines. Therefore, steviol was selected as staring material in current study. Three kinds of structure moiety including enone structure, hydrophobic short chain and cinnamic acid structure were modified in D-ring and C-19 carboxyl group to form cinnamoylation derivative as model. Twenty-five compounds were then synthesized for difference group containing methyl group, methoxy group, hydroxyl group and acetoxy group to be aromatic substituent of cinnamic acid. On the other hand, three amide compounds including 228 (STD-30), 229 (STD-31) and 232 (STD-34) have been synthesized by C19 amination reaction from compound 196.
The cytotoxicity of those 35 synthesized steviol derivatives were tested against PC-3, HCT116 and A549 carcinoma cells with SRB assay and MTT assay. Results indicated that compound 223 (STD-25) displayed much higher activity than the other cinnamoylation derivatives. However, heterocyclic compound 230 (STD-32, IC50=0.55 μM) and amide derivative showed more superior activities. Iodine derivative 211 (STD-14, IC50=1.99 μM) displayed better cytotoxic activity against HCT116 cell line than cinnamoylatoin and amide derivatives. No significant activity was observed for A549 cells. The pharmacological mechanism was still unclear.
In summary, amide derivative 228 exhibited superior cytotoxic activity for PC-3 and HCT116 and was the most potent compound among those steviol derivatives which is worth to study its pharmacological mechanism against cancer cells. |
| 描述: | 碩士
指導教授:黃偉展
委員:顧記華
委員:李美賢
委員:吳姿樺 |
| 資料類型: | thesis |
| 顯示於類別: | [生藥學研究所] 博碩士論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 173 | 檢視/開啟 |
|
在TMUIR中所有的資料項目都受到原著作權保護.
|
