In vitro screening of Fe2+-chelating effect by a Fenton's reaction-luminol chemiluminescence system

• Published in: Luminescence (Chichester, England) Vol. 29; no. 7; pp. 955 - 958
• Main Authors: Wada, Mitsuhiro, Komatsu, Hiroaki, Ikeda, Rie, Aburjai, Talal A., Alkhalil, Suleiman M., Kuroda, Naotaka, Nakashima, Kenichiro
• Format: Journal Article
• Language: English
• Published: England Blackwell Publishing Ltd 01-11-2014; Wiley Subscription Services, Inc
• Subjects: chelating effect; Deferoxamine - chemistry; Edetic Acid - chemistry; Fe2; Fenton's reaction; Ferrous Compounds - chemistry; in vitro screening; Iron Chelating Agents - chemistry; Luminescence; luminol; Luminol - chemistry; Molecular Structure; Phenanthrolines - chemistry; Pyridones - chemistry; Fenton's reaction; in vitro screening; Fe2; chelating effect; luminol
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.2628

ABSTRACT
In vitro screening of a Fe2+‐chelating effect using a Fenton's reaction–luminol chemiluminescence (CL) system is described. The luminescence between the reactive oxygen species generated by the Fenton's reaction and luminol was decreased on capturing Fe2+ using a chelator. The proposed method can prevent the consumption of expensive seed compounds (drug discovery candidates) owing to the high sensitivity of CL detection. Therefore, the assay could be performed using small volumes of sample solution (150 μL) at micromolar concentrations. After optimization of the screening conditions, the efficacies of conventional chelators such as ethylenediaminetetraacetic acid (EDTA), diethylentriaminepentaacetic acid (DETAPAC), deferoxamine, deferiprone and 1,10‐phenanthroline were examined. EC50 values for these compounds (except 1,10‐phenanthroline) were in the range 3.20 ± 0.87 to 9.57 ± 0.64 μM (n = 3). Rapid measurement of the Fe2+‐chelating effect with an assay run time of a few minutes could be achieved using the proposed method. In addition, the specificity of the method was discussed. Copyright © 2014 John Wiley & Sons, Ltd.