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研究生:吳孟壕
研究生(外文):Meng-Hao Wu
論文名稱:虎杖之代謝動力學及其對胺甲葉酸動力學之影響
論文名稱(外文):Metabolic Pharmacokinetics of Polygonum cuspidatum and Its Effects on the Pharmacokinetics of Methotrexate
指導教授:李珮端李珮端引用關係
學位類別:碩士
校院名稱:中國醫藥大學
系所名稱:中國藥學研究所碩士班
學門:醫藥衛生學門
學類:藥學學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:91
中文關鍵詞:藥物動力學虎杖胺甲葉酸大黃素白藜蘆醇
外文關鍵詞:pharmacokineticspolygonum cuspidatumMTXemodinresveratrol
相關次數:
  • 被引用被引用:2
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
虎杖為蓼科 (Polygonaceae) 植物虎杖Polygonum cuspidatum SIEB. et ZUCC.之根莖及根,主要成分有白藜蘆醇 (resveratrol) 和大黃素 (emodin) 等多酚類。多酚類常以苷元及配醣體的形式存在植物中,本研究以 HPLC 方法定量虎杖水煎劑酸水解前與酸水解後 resveratrol和 emodin 的含量,結果顯示虎杖水煎劑中 resveratrol 主要以苷元的形式存在,emodin 主要以配醣體的形式存在。
大白鼠口服虎杖水煎劑後,於特定時間點採血,以sulfatase/glucuronidase 及 glucuronidase 分別水解血液檢品後,利用HPLC 方法定量。結果在血中皆未偵測到 resveratrol 及 emodin 之原形,顯示 resveratrol 與 emodin 吸收後立即代謝成結合態代謝物。Resveratrol 被代謝成 sulfates 及 glucuronides,而 emodin 以glucuronides 為主要代謝物。
Methotrexate 是ㄧ種葉酸拮抗劑,治療指數狹窄,用於治療癌症
VIII
及作為免疫抑制劑。本研究探討併服兩種劑量及不同時間併服虎杖水煎劑對 MTX 動力學之影響,結果顯示於 30 分鐘前併服 2 g/kg 虎杖水煎劑顯著抑制 MTX 之吸收與排除,但 1 g/kg 僅顯著降低 MTX 之吸收;而虎杖於 1.5 小時後併服仍顯著抑制 MTX 之排除,因此建議病人在接受 MTX 治療時,應盡量避免同期服用含虎杖之相關製劑,以確保療效與安全。
Polygoni Cuspidati (PC) Rhizoma is the stems and roots of Polygonum cuspidatum SIEB. et ZUCC. (Polygonaceae). Resveratrol and emodin are the major phenolic components in PC. Polyphenols are usually present as glycosides or aglycones in nature. We investigated the contents of resveratrol and emodin in PC decoction before and after acidic hydrolysis. Resveratrol was found mainly as aglycones and emodin as glycosides.
The blood of rats withdrawn via cardiopuncture at specific time after oral administration of PC decoction. The concentrations of resveratrol and emodin were determined by HPLC method after treatments with sulfatase/glucuronidase and glucuronidase, respectively. The results indicated that the parent forms of resveratrol and emodin were not detected in blood. Resveratrol was present as sulfates and glucuronides, and emodin mainly as glucuronides.
Methotrexate (MTX), a folate antagonist, is commonly used as immunosuppressant but with narrow therapeutic window. We investigated
X
the effects of two doses of PC decoction and different coadministration time on the pharmacokinetics of MTX. The results showed that coadministration of PC decoction (2 g/kg) 30 min before MTX significantly inhibited both the absorption and elimination of MTX, whereas PC decoction (1 g/kg) only inhibited its absorption. Coadministration of PC decoction at 1.5 hr after MTX also markedly inhibited the elimination of MTX. Therefore, coadministration with PC decoction with MTX should be avoided at the same period to ensure the efficacy and safty of MTX.
目錄.....................................................................................................................Ⅰ
附圖目錄.............................................................................................................Ⅲ
附表目錄.............................................................................................................Ⅳ
中文摘要.............................................................................................................Ⅶ
英文摘要.............................................................................................................Ⅸ
第ㄧ章 緒言........................................................................................................1
第二章 總論........................................................................................................3
第一節 虎杖之文獻考察..............................................................................3
第二節 白藜蘆醇、大黃素之結構、物化性質與藥理活性.....................11
第三節 胺甲葉酸(Methotrexate)之特性.....................................................16
第四節 多重抗藥性蛋白(multi-drug resistance proteins, MRPs) 之特性....................................................................................................21
第五節 有機陰離子運送蛋白 (organic anionic transporters, OATs) 之特性.... ...............................................................................................26
第三章 實驗材料與方法..................................................................................30
第一節 實驗材料........................................................................................30
一、實驗試藥..............................................................................................30
二、中藥材..................................................................................................31
II
三、儀器及耗材..........................................................................................32
四、溶液配製..............................................................................................34
五、實驗動物..............................................................................................36
第二節 實驗方法........................................................................................37
一、虎杖水煎劑中emodin、resveratrol與其配醣體之定量...................37
二、虎杖水煎劑於大白鼠體內之代謝動力學..........................................40
三、虎杖水煎劑於大白鼠體內對胺甲葉酸代謝動力學之影響..............45
(一) 虎杖水煎劑不同併服劑量對MTX動力學之影響.........................45
(二) 虎杖水煎劑不同併服時間對MTX動力學之影響.........................45
第四章 結果與討論...........................................................................................47
一、虎杖水煎劑中emodin 、resveratrol與其配醣體之定量......................47
二、虎杖水煎劑於大白鼠體內之代謝動力學...............................................49
三、虎杖水煎劑對胺甲葉酸代謝動力學之影響...........................................53
第五章 結論與建議...........................................................................................58
參考文獻.............................................................................................................59
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