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• W2022864817 abstract "We have designed a convenient, specific, sensitive and continuous lipase assay based on the use of natural triacylglycerols (TAGs) from the Aleurites fordii seed oil which contains α-eleostearic acid (9,11,13,cis,trans,trans-octadecatrienoic acid) and which was coated in the wells of microtiter plates. The coated TAG film cannot be desorbed by the various buffers used during the lipase assay. Upon lipase action, α-eleostearic acid is liberated and desorbed from the interface and then solubilized into the micellar phase. Consequently, the UV absorbance of the α-eleostearic acid is considerably enhanced due to the transformation from an adsorbed to a water soluble state. The lipase activity can be measured continuously by recording the variations with time of the UV absorption spectra. The rate of lipolysis was monitored by measuring the increase of OD at 272 nm, which was found to be linear with time and directly proportional to the amount of added lipase. This microtiter plate lipase assay, based on coated TAGs, presents various advantages as compared to the classical systems: (i) coated TAGs on the microtiter plates could be stored for a long-time at 4 °C, (ii) higher sensitivity in lipase detection, (iii) good reproducibility, and (iv) increase of signal to noise ratio due to high UV absorption after transfer of α-eleostearic acid from an adsorbed to a soluble state. Low concentrations, down to 1 pg mL−1 of pure Thermomyces lanuginosus or human pancreatic lipase, could be detected under standard assay conditions. The detection sensitivity of this coated method is around 1000 times higher as compared to those obtained with the classical emulsified systems. This continuous high throughput lipase assay could be used to screen new lipases and/or lipase inhibitors present in various biological samples." @default.
• W2022864817 created "2016-06-24" @default.
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• W2022864817 date "2013-01-01" @default.
• W2022864817 modified "2023-09-25" @default.
• W2022864817 title "Development of a high-throughput assay for measuring lipase activity using natural triacylglycerols coated on microtiter plates" @default.
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• W2022864817 doi "https://doi.org/10.1039/c3an36699e" @default.
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