PMID- 15386800 OWN - NLM STAT- MEDLINE DCOM- 20050408 LR - 20131121 IS - 1522-7235 (Print) IS - 1522-7235 (Linking) VI - 19 IP - 5 DP - 2004 Sep-Oct TI - Chemiluminescence assay of lipase activity using a synthetic substrate as proenhancer for luminol chemiluminescence reaction. PG - 259-64 AB - A novel chemiluminescence (CL) assay method for lipase (triacylglycerol lipase, E.C.3.1.1.3) activity was developed by using the lauric acid ester of 2-(4-hydroxyphenyl)-4,5-diphenylimidazole (HDI) as a substrate. The method is based on the enhanced CL reaction of luminol-hydrogen peroxide-horseradish peroxidase (HRP) with HDI that is liberated from the substrate by enzymatic hydrolysis. To simplify the assay procedure, both the hydrolysis of the substrate and the enhanced CL reaction were performed in the same reaction mixture. Lipases from Candida cylindracea and porcine pancreas were successfully determined with the detection limits (blank signal + 3 SD) of 0.05 and 50.0 mU/tube, respectively. The method is simple and rapid, permitting the completion of single assay within 5 min. The reproducibilities obtained with replicate assays were relative standard deviations (RSDs) of <=> 4.7% for within-day and <=> 6.0% for between-day assays. FAU - Ichibangase, Tomoko AU - Ichibangase T AD - Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan. FAU - Ohba, Yoshihito AU - Ohba Y FAU - Kishikawa, Naoya AU - Kishikawa N FAU - Nakashima, Kenichiro AU - Nakashima K FAU - Kuroda, Naotaka AU - Kuroda N LA - eng PT - Journal Article PL - England TA - Luminescence JT - Luminescence : the journal of biological and chemical luminescence JID - 100889025 RN - 0 (2-(4-hydroxyphenyl)-4,5-diphenylimidazole) RN - 0 (Imidazoles) RN - 0 (Triglycerides) RN - 5EXP385Q4F (Luminol) RN - BBX060AN9V (Hydrogen Peroxide) RN - EC 1.11.1.- (Horseradish Peroxidase) RN - EC 3.1.1.3 (Lipase) SB - IM MH - Animals MH - Candida/enzymology MH - Horseradish Peroxidase/chemistry MH - Hydrogen Peroxide/chemistry MH - Hydrolysis MH - Imidazoles/*chemistry MH - *Lipase/analysis/chemistry/metabolism MH - Luminescent Measurements/*methods MH - Luminol/*chemistry MH - Pancreas/enzymology MH - Sensitivity and Specificity MH - Substrate Specificity MH - Swine MH - Triglycerides/analysis/metabolism EDAT- 2004/09/24 05:00 MHDA- 2005/04/09 09:00 CRDT- 2004/09/24 05:00 PHST- 2004/09/24 05:00 [pubmed] PHST- 2005/04/09 09:00 [medline] PHST- 2004/09/24 05:00 [entrez] AID - 10.1002/bio.770 [doi] PST - ppublish SO - Luminescence. 2004 Sep-Oct;19(5):259-64. doi: 10.1002/bio.770.