Abstract
A protocol, based on the use of Pseudomonas lipase, is presented to measure quantitatively the amount of triacylglycerols in extracts from cultured cells or tissues. Since the lipase also acts on di- and monoacylglycerols, separation of the extracts by thin-layer chromatography is recommended. In order to allow the lipase-catalyzed hydrolysis to proceed efficiently, lipid extracts or eluates from silica scraping were mixed with the detergent Thesit [dodecylpoly(ethylene glycol ether)], prior to drying. After dissolution of the dried residues in water, the amount of triacylglycerols was quantified using Pseudomonas sp. lipase, glycerol kinase, glycerol-phosphate oxidase, and peroxidase. The activity of the latter enzyme was followed either colorimetrically in the presence of 4-aminoantipyrine and 2,4,6-tribromo-3-hydroxybenzoic acid or fluorimetrically in the presence of homovanillic acid.
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Abbreviations
- AAP:
-
4-aminoantipyrine
- LNCaP:
-
lymph node carcinoma of the prostate
- TAG:
-
triacylglycerol
- TBHB:
-
2,4,6-tribromo-3-hydroxybenzoic acid
- TLC:
-
thin-layer chromatography
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Van Veldhoven, P.P., Swinnen, J.V., Esquenet, M. et al. Lipase-based quantitation of triacylglycerols in cellular lipid extracts: Requirement for presence of detergent and prior separation by thin-layer chromatography. Lipids 32, 1297–1300 (1997). https://doi.org/10.1007/s11745-006-0166-1
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DOI: https://doi.org/10.1007/s11745-006-0166-1