Abstract
Lipases play various roles in fat digestion, lipoprotein metabolism, and in the mobilization of fat stored in lipid bodies in animals, plants and microorganisms. In association with these physiological functions, there is an important field of research for discovering lipase inhibitors and developing new treatments of diseases such as obesity, atherosclerosis, diabetes and tuberculosis. In this context, the development of convenient, specific and sensitive analytical methods for the detection and assay of lipases and/or lipase inhibitors is of major importance. It is shown here that purified triacylglycerols (TAGs) from Punica granatum (Pomegranate) seed oil coated on microtiter plates can be used for the continuous assay of lipase activity by recording the variations with time of the UV absorption spectra at 275 nm. UV absorption is due the release of punicic acid (9Z,11E,13Z-octadeca-9,11,13-trienoic acid), a conjugated triene contained in Pomegranate oil. This new microtiter plate assay allows to accurately measure the activity of a wider range of lipases compared to the similar assay previously developed with Tung oil containing α-eleostearic acid (9Z,11E,13E-octadeca-9,11,13-trienoic acid), including the LipY lipase from M...Continue Reading
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