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dc.contributor.author | Oyarzún, Paulina | |
dc.contributor.author | Carrasco, Jonathan | |
dc.contributor.author | Peterssen, Darlene | |
dc.contributor.author | Tereucan, Gonzalo | |
dc.contributor.author | Aranda, Mario | |
dc.contributor.author | Henríquez-Aedo, Karem | |
dc.date.accessioned | 2024-09-12T03:39:47Z | |
dc.date.available | 2024-09-12T03:39:47Z | |
dc.date.issued | 2023-11-22 | |
dc.identifier.issn | 0021-9673 | |
dc.identifier.uri | https://repositorio.uss.cl/handle/uss/11448 | |
dc.description | Publisher Copyright: © 2023 | |
dc.description.abstract | A high throughput method was developed to detect bioactive molecules with inhibitory activity over cyclooxygenase (COX-2) enzyme applying effect-directed analysis and planar chromatography hyphenated with bioassay and mass spectrometry. The assay was based on the indirect measurement of arachidonic acid transformation into prostaglandin with the colorimetric co-substrate N,N,N’,N’-tetramethyl-p-phenylenediamine. Inhibitory zones were observed as colorless bands over a blue background. Using a central composite design the critical factors like substrate concentration, enzyme: substrate ratio, reaction time, and co-substrate concentration were optimized. Optimal conditions were achieved with 0.03 mg/mL of arachidonic acid, 0.15 U/mL of COX-2, and 8.21 mg/mL of chromogenic reagent. Method usefulness was challenged analyzing fresh Chiloe's giant garlic (Allium ampeloprasum L) ethanol: water (8:2 v/v) extract, finding COX-2 inhibitors that were preliminarily identified as the isomers γ-glutamyl-S-allyl-L-cysteine and γ-glutamyl-S-(trans-1-propenyl)-L- cysteine. | en |
dc.language.iso | eng | |
dc.relation.ispartof | vol. 1711 Issue: Pages: | |
dc.source | Journal of Chromatography A | |
dc.title | A high throughput method for detection of cyclooxygenase-2 enzyme inhibitors by effect-directed analysis applying high performance thin layer chromatography-bioassay-mass spectrometry | en |
dc.type | Artículo | |
dc.identifier.doi | 10.1016/j.chroma.2023.464426 | |
dc.publisher.department | Facultad de Medicina y Ciencia |
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