English  |  正體中文  |  简体中文  |  Items with full text/Total items : 27454/39300
Visitors : 2535937      Online Users : 34
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38501

Title: Synthesis of Fluorescent Gold Nanodot–Liposome Hybrids for Detection of Phospholipase C and Its Inhibitor
Authors: Wei-Yu Chen;Li-Yi Chen;Chung-Mao Ou;Chih-Ching Huang;Shih-Chung Wei;Huan-Tsung Chang
Contributors: 國立臺灣海洋大學:生命科學暨生物科技學系
Date: 2013
Issue Date: 2016-09-08T01:21:35Z
Publisher: Analytical Chemistry
Abstract: Abstract: We report the synthesis of fluorescent 11-mercaptoundecanoic acid–gold nanodot–liposome (11-MUA–Au ND/Lip) hybrids by incorporation of gold nanoparticles (∼3 nm) and 11-MUA molecules in hydrophobic phospholipid membranes that self-assemble to form small unilamellar vesicles. A simple and homogeneous fluorescence assay for phospholipase C (PLC) was developed on the basis of the fluorescence quenching of 11-MUA–Au ND/Lip hybrids in aqueous solution. The fluorescence of the 11-MUA–Au ND/Lip hybrids is quenched by oxygen (O2) molecules in solution, and quenching is reduced in the presence of PLC. PLC catalyzes the hydrolysis of phosphatidylcholine units from Lip to yield diacylglycerol (DAG) and phosphocholine (PC) products, leading to the decomposition of Lip. The diacylglycerol further interacts with 11-MUA–Au NDs via hydrophobic interactions, leading to inhibition of O2 quenching. The 11-MUA–Au ND/Lip probe provides a limit of detection (at a signal-to-noise ratio of 3) of 0.21 nM for PLC, with high selectivity over other proteins, enzymes, and phospholipases. We have validated the practicality of using this probe for the determination of PLC concentrations in breast cancer cells (MCF-7 and MDA-MB-231 cell lines) and nontumor cells (MCF-10A cell line), revealing that the PLC activity in the first two is at least 1.5-fold higher than that in the third. An inhibitor assay using 11-MUA–Au ND/Lip hybrids demonstrated that tricyclodecan-9-yl potassium xanthate (D609) inhibits PLC (10 nM) with an IC50 value of 3.81 ± 0.22 μM. This simple, sensitive, and selective approach holds great potential for detection of PLC in cancer cells and for the screening of anti-PLC drugs.
Relation: 85(18)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38501
Appears in Collections:[生命科學系] 期刊論文

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback