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  • General Chemistry  (3)
  • 2D NMR  (2)
  • Farming trials  (1)
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  • 1
    ISSN: 1434-193X
    Schlagwort(e): Natural products ; Dimeric steroids ; Crellastatins ; Sponge ; Crella sp. ; 2D NMR ; Antitumor agents ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: -Seven new cytotoxic dimeric steroids, namely crellastatins B-H (2-8), have been isolated from the Vanuatu sponge Crella sp. They have been structurally characterized on the basis of 2D-NMR (500 MHz) and FAB-MS data. All the new compounds show the same unprecedented junction between the monomeric units, formed via their side-chains, whereas they differ from A (1) in the hydroxylation pattern of the two tetracyclic cores. Like crellastatin A (1), crellastatins B-H (2-8) exhibit in vitro antitumor activity against human bronchopulmonary non-small-cell lung carcinoma cell lines (NSCLC) with IC50 values in the range of 2-10 μg/mL.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1434-193X
    Schlagwort(e): Natural products ; Amino acids ; Peptides ; Macrocycles ; Axinella carteri ; Sponge ; Cyclopeptides ; 2D NMR ; ESMS ; MS ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Two new bioactive cyclopeptides, named axinellins A (1) and B (2) have been isolated from the marine sponge Axinella carteri. Their structure elucidation was based on two-dimensional (2D) NMR (500 MHz) as well as HRFABMS and ESMS/MS data. All amino acid residues derived from axinellins A and B were found to possess L configuration at Cα by HPLC analysis of their FDAA derivatives (Marfey's method). The amino acid sequence of 1 and 2 was established on the basis of tandem mass spectrometry data (ESMS/MS) and on 1H-1H through-space connectivities observed in NOESY and ROESY spectra. Axinellins A (1) and B (2) exhibited moderate in vitro antitumor activity against human broncopulmonary non-small-cell-lung-carcinoma lines (NSCLC-N6) with IC50 values of 3.0 and 7.3 μg/ml, respectively.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 697-701 
    ISSN: 1434-193X
    Schlagwort(e): Corticium sp. ; Steroids ; Alkaloids ; Secondary metabolites ; Cytotoxic activity ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: -Five new steroidal alkaloids, plakinamines C (1) and D (2), and the related compounds 3-5 have been isolated from the Vanuatu sponge Corticium sp. Their structures have been elucidated by a detailed spectroscopic analysis, including 2D-HMBC and ROESY correlation experiments. The new compounds show significant in vitro cytotoxicity against human bronchopulmonary non-small-cell lung carcinoma cells (NSCLC-N6) with IC50 values of 〈 3.3-5.7 μg/mL. When tested against T leukemia virus type one (HTLV-I), compounds 1, 4 and 5 were found to exhibit slight anti-HIV activity.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2024-04-26
    Beschreibung: Dynamics of microbiomes through time are fundamental regarding survival and resilience of their hosts when facing environmental alterations. As for marine species with commercial applications, such as marine sponges, assessing the temporal change of prokaryotic communities allows us to better consider the adaptation of sponges to aquaculture designs. The present study aims to investigate the factors shaping the microbiome of the sponge Dactylospongia metachromia, in a context of aquaculture development in French Polynesia, Rangiroa, Tuamotu archipelago. A temporal approach targeting explants collected during farming trials revealed a relative high stability of the prokaryotic diversity, meanwhile a complementary biogeographical study confrmed a spatial specifcity amongst samples at diferent longitudinal scales. Results from this additional spatial analysis confrmed that diferences in prokaryotic communities might frst be explained by environmental changes (mainly temperature and salinity), while no signifcant efect of the host phylogeny was observed. The core community of D. metachromia is thus characterized by a high spatiotemporal constancy, which is a good prospect for the sustainable exploitation of this species towards drug development. Indeed, a microbiome stability across locations and throughout the farming process, as evidenced by our results, should go against a negative infuence of sponge translocation during in situ aquaculture.
    Schlagwort(e): Holobiont ; Marine sponges ; Microbiome ; Farming trials ; Biogeography ; French Polynesia
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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