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  5. 臺灣三種海洋細菌之生物活性成分研究
 
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臺灣三種海洋細菌之生物活性成分研究

Other Title
Studies on the bioactive constituents of three marine bacterial species isolated in Taiwan
Type
thesis
Date Issued
2009-06-19
Author(s)
許瑜真
Advisor
李宗徽
Subjects
系所名稱:生藥學研究所
Description
學位別:碩士
語文別:中文
指導教授:李宗徽
共同指導教授:
口試委員:郭悅雄 博士;吳天賞 博士
中文關鍵字:海洋細菌
Abstract
以三種不同培養基篩選出143株海洋細菌株,經醱酵培養後,萃取液初步以抑制一氧化氮合成酶 (NOS) 的活性與利用Phenylephrine誘發大鼠 (Sprague-Dawley Rat) 胸主動脈收縮活性平台進行篩選出具有抑制血管收縮的菌株。結果自143株海洋菌株萃取液中發現二株對於RAW 264.7細胞具有細胞毒性,分別為 Streptomyces sp. (#HYC21) 和 Pseudoalteromonas sp. (#HYC13),另一株 Pseudomonas aeruginosa (#M1B) 則具有抑制血管收縮的活性,後續針對這三株具有生物活性的菌株以PPY、PY和PYG 培養基分批擴大培養,進行一系列的分析、分離、純化與構造解析,計分離、決定出二十一個化合物,包括:二個環肽類抗生素 (cyclic peptide antibiotics) 的actinomycin X2 (1)、actinomycin D (2);二個多溴酚類抗生素 (polybrominated phenolic antibiotics) 的 pentabromopseudilin (8) 和3,3′,5,5′-tetrabromo-2,2′-biphenyldiol (9);三個膽酸及其類似物 (cholic acid and its analogs) 的cholic acid (10)、deoxycholic acid (11)、glycocholic acid (12);五個喹啉生物鹼 (quinoline alkaloid) 分別為2- heptylquinol-4-one (13)、2-heptyl-3-hydroxyquinolin-4(1H)-one (14)、2-(1′E-nonenyl)quinol-4-one (15)、2-nonylquinol-4-one (16)、 3-heptyl-3-hydroxy-1,2,3,4-tetrahydroquinoline-2,4-dione (17);二個酚類化合物 (phenolics) 的2-(2-hydroxyphenyl)-2-thiazoline-4-methanol (18)、4,4′-isopropylidenebisphenol (19);一個吩嗪生物鹼 (phenazine alkaloid) phenazine-1-carboxamide (21) 及五個環化雙胺基酸 (diketopiperazine) 分別為cyclo-L-Pro-L-Val (3)、cyclo-L-Pro-L-Ile (4)、cyclo-L-Pro-L-Leu (5)、cyclo-D-Pro-L-Phe (6)、cyclo-L-Pro-L-Phe (7)、cyclo-L-Pro-L-Trp (20)。此外,由M1B所分離得到的化合物在生物活性及作用機制,刻正持續探究中。
URI
https://203.71.86.71/handle/123456789/12842
https://hdl.handle.net/11296/q2dwg8
File(s)
No Thumbnail Available
Name

C0191175.pdf

Size

43.39 MB

Format

Adobe PDF

Checksum

(MD5):f99111efef61d709261bd79b8bf1fffb

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