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Direct Determination of Horseradish Peroxidase Encapsulated in Liposomes by Using Luminol Chemiluminescence

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Title: Direct Determination of Horseradish Peroxidase Encapsulated in Liposomes by Using Luminol Chemiluminescence
Authors: KAMIDATE, Tamio Browse this author
KOMATSU, Kanako Browse this author
TANI, Hirofumi Browse this author →KAKEN DB
ISHIDA, Akihiko Browse this author
Keywords: Horseradish peroxidase (HRP)
chemiluminescence (CL)
Issue Date: 10-Apr-2008
Publisher: 日本分析化学会
Journal Title: Analytical Sciences
Volume: 24
Issue: 4
Start Page: 477
End Page: 481
Publisher DOI: 10.2116/analsci.24.477
Abstract: Horseradish peroxidase (HRP) encapsulated in liposomes was directly detected by using luminol chemiluminescence (CL) with H2O2 without lysis of liposomes. At a low concentration of H2O2, the initial rate of HRP-catalyzed luminol CL in liposomes was slower than that of HRP-catalyzed luminol CL in a lipid-free bulk solution. The decrease in the initial rate of the CL reaction in liposomes was due to the membrane permeation of luminol and H2O2. At a high concentration of H2O2, the initial rate of the CL reaction in liposomes was the same as that in a lipid-free bulk solution. The CL measurement conditions in both a lipid-free bulk solution and in liposomes were optimized in the concentrations of luminol and H2O2 by measuring the CL response curves, in which only one peak appeared and the CL intensity was maximal. The CL intensity observed in HRP-catalyzed luminol CL in liposomes was a factor of seven greater than that observed in a lipid-free bulk solution. The CL intensity was dependent on the amount of HRP-encapsulated liposomes used. The detection limit in the direct detection of HRP encapsulated in liposomes was sensitive by a factor of 3 compared with that in HRP-catalyzed luminol CL in a lipid-free bulk solution.
Type: article
URI: http://hdl.handle.net/2115/71700
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 谷 博文

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