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  5. 評估插管小鼠經靜脈及口服多次劑量投與質體DNA (pMBP-Lac Z) 聚合微膠體溶液之藥物動力學
 
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評估插管小鼠經靜脈及口服多次劑量投與質體DNA (pMBP-Lac Z) 聚合微膠體溶液之藥物動力學

Other Title
Evaluation of pharmacokinetics of pMBP-Lac Z with polymeric
micelles via multiple-dose intravenous and oral administrations in cannulated mice
Type
thesis
Date Issued
2009-06-24
Author(s)
張念樺
Advisor
廖嘉鴻
Subjects
系所名稱:藥學研究所
Description
學位別:碩士
語文別:中文
指導教授:廖嘉鴻
共同指導教授:張淑芬
口試委員:江樵熹;陳錦龍;許光陽
中文關鍵字:質體DNA (pMBP-Lac Z);藥物動力學
Abstract
發展一個新的基因載體,評估其質體DNA 及質體DNA 與載體之複合物,在體內之組織分佈情形是必要的。而本次實驗所利用的質體DNA,為帶有寡樹突神經細胞上的特殊蛋白質基因 - 髓鞘基質蛋白質 (myelin basic protein, MBP)基因的啟動子之pMBP-Lac Z,評估經由靜脈及口服投與三個劑量pMBP-Lac Z
(40?g DNA/150 ?L) 與pMBP-Lac Z 聚合微膠體溶液到插管小鼠,其體內
pMBP-Lac Z 之藥物動力學參數及體內之分佈情形。血液及組織檢品利用即時聚
合酶連鎖反應法 (Q-PCR) 分析檢品中pMBP-Lac Z 含量。實驗初步結果顯示,
在頸靜脈投與(IVJ)三次總劑量後之血液檢品中發現,pMBP-Lac Z (P) 之曲線下
面積(area under the curve, AUC) 為1.56 x 1012 (min x copies/?L),投與pMBP-Lac
Z 聚合微膠體溶液 (P/PM) 之AUC 為5.29 x 1011 (min x copies/?L)。而排除半衰
期的部份,投與P 為436 分鐘,投與P/PM 為344 分鐘。經由尾靜脈投與 (IVT)
P/PM 後的血中濃度曲線圖發現, AUC 為5.12 x 1011 (min x copies/?L),其半衰
期為97 分鐘。口服投與三個劑量的P/PM,其AUC 為1.73 x 107 (min x
copies/?L) ,半衰期為58 分鐘。利用IVJ 和IVT 投與單一劑量P 和P/PM 的5, 30
和60 分鐘後,觀察到DNA 主要分佈於心臟、肺臟、腦、脊髓和腎臟等高血流
的組織,若經由口服投與P 和P/PM 後,以十二指腸及胃部組織為主要分佈組織。
此外,體外DNase 安定性試驗發現,PM 存在下確實能對DNA 有保護效果,而
pMBP-Lac Z 在體外的血漿安定性試驗發現,不論是P 或P/PM 之安定性,在20
分鐘都已觀察不到完整之pMBP-Lac Z 存在,若是胃沖洗液的安定性試驗,則是
P 或P/PM 皆在60 分鐘才開始出現DNA 片段。綜合以上結果,體內實驗發現,
不同投與途徑下確實會影響其體內的組織分佈情形。
URI
https://203.71.86.71/handle/123456789/13042
https://hdl.handle.net/11296/vhgv2t
File(s)
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C0191145.pdf

Size

8.79 MB

Format

Adobe PDF

Checksum

(MD5):0ee595861bda26500c78184f2a1cb465

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