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  5. 黃耆萃取物抑制人類血小板活性之分子機轉探討
 
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黃耆萃取物抑制人類血小板活性之分子機轉探討

Other Title
Molecular mechanisms underlying the antiplatelet activity of Astragali Radix extracts
Type
thesis
Date Issued
2023-06-19
Author(s)
陳亭宇
Advisor
呂婉榕
Subjects
系所名稱:醫學科學研究所碩士班
Description
學位別:碩士
語文別:中文
口試委員:呂婉榕 LU, WAN-JUNG;楊志豪 YANG, CHIH-HAO;謝政穎 HSIEH, CHENG-YING
授權範圍:網際網路,開放日期為2023-07-21
Abstract
血栓的形成與血小板活化有著密不可分關聯,其亦在心血管疾病中扮演著相當重要的角色。目前抗血栓藥物對血栓栓塞型疾病的治療十分有效;然而,由於其嚴重的副作用,使得這些藥物在使用上被侷限。Calycosin (Cal)和Formononetin (For)是傳統中草藥黃耆(Fisch.)的主要萃取物,具有多種功效,如抗氧化、抗腫瘤、抗發炎和神經保護等。但是,兩種萃取物對血小板的活化作用仍不清楚,因此,本研究在探討Cal和For在血小板活化和血栓形成中的詳細機制。在這項研究中,使用血小板凝集試驗和西方墨點法來探討Cal和For在體外對血小板活化的影響。結果顯示,Cal (5-20 µM)和For (10-50 µM)會抑制由collagen (1 µg/mL)所誘導的血小板活化,但對thrombin (0.02 U/mL)與U46619 (thromboxane A2類似物,1 µM)卻沒有影響。此外,Cal 會抑制MAPKs、AKT、PKC以及PLC2的磷酸化,並影響血小板顆粒釋放。在動物實驗中也顯示Cal會減少血栓的形成,且不具有出血的副作用。我們研究結果表明,Cal能預防或是治療血栓栓塞型疾病的潛在藥物。
URI
https://handle.ncl.edu.tw/11296/mtjxwb
https://203.71.86.71/handle/123456789/10256

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