• Medientyp: E-Artikel
  • Titel: Identification of Plakortide E from the Caribbean Sponge Plakortis halichondroides as a Trypanocidal Protease Inhibitor using Bioactivity-Guided Fractionation
  • Beteiligte: Oli, Swarna [VerfasserIn]; Abdelmohsen, Usama [VerfasserIn]; Hentschel, Ute [VerfasserIn]; Schirmeister, Tanja [VerfasserIn]
  • Erschienen: MDPI, 2014
  • Sprache: Englisch
  • DOI: https://doi.org/10.3390/md12052614
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  • Beschreibung: In this paper, we report new protease inhibitory activity of plakortide E towards cathepsins and cathepsin-like parasitic proteases. We further report on its anti-parasitic activity against Trypanosoma brucei with an IC₅₀ value of 5 μM and without cytotoxic effects against J774.1 macrophages at 100 μM concentration. Plakortide E was isolated from the sponge Plakortis halichondroides using enzyme assay-guided fractionation and identified by NMR spectroscopy and mass spectrometry. Furthermore, enzyme kinetic studies confirmed plakortide E as a non-competitive, slowly-binding, reversible inhibitor of rhodesain
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