0000000000289407

AUTHOR

Michael H.g. Kubbutat

showing 3 related works from this author

Trimeric Hemibastadin Congener from the Marine Sponge Ianthella basta

2012

The first naturally occurring trimeric hemibastadin congener, sesquibastadin 1 (1), and the previously reported bastadins 3, 6, 7, 11, and 16 (2-6) were isolated from the marine sponge Ianthella basta, collected in Indonesia. The structure of 1 was elucidated on the basis of 1D and 2D NMR measurements and by HRMS. Among all the isolated compounds, the linear sesquibastadin 1 (1) and bastadin 3 (2) showed the strongest inhibition rates for at least 22 protein kinases (IC(50) = 0.1-6.5 μM), while the macrocyclic bastadins (3-6) demonstrated a strong cytotoxic potential against the murine lymphoma cell line L5178Y (IC(50) = 1.5-5.3 μM).

StereochemistryPharmaceutical ScienceMarine BiologySesquibastadinAnalytical ChemistryMiceIanthella bastaDrug DiscoveryHalogenated Diphenyl EthersAnimalsNuclear Magnetic Resonance BiomolecularProtein Kinase InhibitorsPharmacologyMolecular StructurebiologyMurine lymphomaOrganic Chemistrybiology.organism_classificationPoriferaSpongeCongenerComplementary and alternative medicineIndonesiaMolecular MedicineDrug Screening Assays AntitumorTwo-dimensional nuclear magnetic resonance spectroscopyJournal of Natural Products
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Arthrinins A–D: Novel diterpenoids and further constituents from the sponge derived fungus Arthrinium sp.

2011

Bioassay-guided fractionation of a methanolic extract of the fungus Arthrinium sp., isolated from the Mediterranean sponge Geodia cydonium, afforded 10 natural products including five new diterpenoids, arthrinins A-D (1-4) and myrocin D (5). In addition, five known compounds were obtained, which included myrocin A (6), norlichexanthone (7), anomalin A (8), decarboxycitrinone (9) and 2,5-dimethyl-7-hydroxychromone (10). The structures of all isolated compounds were unambiguously elucidated based on extensive 1D and 2D NMR and HR-MS analyzes. The absolute configuration of arthrinins A-D (1-4) was established by the convenient Mosher method performed in NMR tubes and by interpretation of the R…

Vascular Endothelial Growth Factor AClinical BiochemistryPharmaceutical ScienceAntineoplastic AgentsBiochemistryMiceAscomycotaCell Line TumorNeoplasmsDrug DiscoveryAnimalsHumansMTT assayCytotoxicityProtein Kinase InhibitorsMolecular BiologyNeovascularization PathologicKinaseChemistryOrganic ChemistryTerpenoidIn vitroPoriferaEndothelial stem cellVascular endothelial growth factor ABiochemistryCell cultureMolecular MedicineDiterpenesProtein KinasesBioorganic & Medicinal Chemistry
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Cytotoxic and protein kinase inhibiting nakijiquinones and nakijiquinols from the sponge Dactylospongia metachromia.

2014

Chemical investigation of the sponge Dactylospongia metachromia afforded five new sesquiterpene aminoquinones (1-5), two new sesquiterpene benzoxazoles (6 and 7), the known analogue 18-hydroxy-5-epi-hyrtiophenol (8), and a known glycerolipid. The structures of all compounds were unambiguously elucidated by one- and two-dimensional NMR and by MS analyses, as well as by comparison with the literature. Compounds 1-5 showed potent cytotoxicity against the mouse lymphoma cell line L5178Y with IC50 values ranging from 1.1 to 3.7 μM. When tested in vitro for their inhibitory potential against 16 different protein kinases, compounds 5, 6, and 8 exhibited the strongest inhibitory activity against AL…

Pharmaceutical ScienceAntineoplastic AgentsMarine BiologySesquiterpeneAnalytical Chemistrychemistry.chemical_compoundInhibitory Concentration 50MiceDrug DiscoveryAnimalsHumansProtein kinase ACytotoxicityIC50Nuclear Magnetic Resonance BiomolecularProtein Kinase InhibitorsPharmacologyBenzoxazolesMolecular StructureKinaseOrganic ChemistryQuinonesIn vitroPoriferaComplementary and alternative medicineBiochemistrychemistryCell cultureMolecular MedicineDrug Screening Assays AntitumorSesquiterpenesProto-oncogene tyrosine-protein kinase SrcJournal of natural products
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