Article pubs.acs.org/jnp
Metabolomic Profiling Reveals the N‑Acyl-Taurine Geodiataurine in Extracts from the Marine Sponge Geodia macandrewii (Bowerbank) Elisabeth K. Olsen,† Kine L. Søderholm,† Johan Isaksson,‡ Jeanette H. Andersen,§ and Espen Hansen*,§ †
MabCent-SFI, ‡Department of Chemistry, and §Marbio, UiT The Arctic University of Norway, N-9037 Tromsø, Norway S Supporting Information *
ABSTRACT: A metabolomic approach was used to identify known and new natural products from the marine sponges Geodia baretti and G. macandrewii. G. baretti is known to produce bioactive natural products such as barettin (1), 8,9-dihydrobarettin (2), and bromobenzisoxazolone barettin (3), while secondary metabolites from G. macandrewii are not reported in the literature. Specimens of the two sponges were collected from different sites along the coast of Norway, and their extracts were analyzed using UHPLC-HR-MS. Metabolomic analyses revealed that extracts from both species contained barettin (1) and 8,9-dihydrobarettin (2), and all samples of G. baretti contained higher amounts of both compounds compared to G. macandrewii. The analysis of the MS data also revealed that samples of G. macandrewii contained a compound that was not present in any of the G. baretti samples. This new compound was isolated and identified as the N-acyl-taurine geodiataurine (4), and it was tested for antioxidant, anticancer, and antibacterial properties. the relevant bioassay.8 There is a high probability that the isolated compounds have bioactive properties, but on the other hand it will skew the generated natural products library to the bioactivities selected for the primary screening.9 Metabolomics is an alternative approach to identify extracts or target compounds for lead identification, as this technique is based on chemical profiling rather than a preselected bioactivity.10 Metabolomics is used to identify and quantify molecules in a metabolome, the total of small (
