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Anne Klöppel Universität Stuttgart Institute of Biology, Department of Zoology Pfaffenwaldring 57 70569 Stuttgart Germany

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Wolfgang Grasse Universität Stuttgart Institute of Biology, Department of Zoology Pfaffenwaldring 57 70569 Stuttgart Germany

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Franz Brümmer Universität Stuttgart Institute of Biology, Department of Zoology Pfaffenwaldring 57 70569 Stuttgart Germany

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Gertrud Morlock University of Hohenheim Institute of Food Chemistry Garbenstrasse 28 70599 Stuttgart Germany

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Rapid analysis by coupling HPTLC with bioluminescence and mass spectrometry enables very fast response to bioactive substances in unknown samples. In this study marine sponges were screened for new bioactive compounds. After chromatographic separation of twelve methanolic marine sponge extracts the HPTLC plates were coated with bioluminescent bacteria ( Vibrio fischeri ) by a simple dipping procedure. If separated compounds were bioactive they inhibited or enhanced the bacterial luminescence and could be identified as dark zones on the luminescent background. This micro-biological detection revealed new compounds compared with physical (absorbance or fluorescence measurement) or chemical (microchemical derivatization) detection techniques. Effect-directed analysis turned out to be superior to target analysis in the search for natural products with a distinct effect. For identification of unknown bioactive zones the HPTLC system was coupled to a high-resolution mass spectrometer to obtain the exact masses of the unknowns. Thus, a Vibrio fischeri -bioactive zone was identified as avarone, a bioactive metabolite so far only known to be synthesized by the sponge Dysidea avara . This methodology proved very effective not only for detection but also for identification of unknown bioactive metabolites in sponges.

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Journal of Planar Chromatography - Modern TLC
Language English
Size A4
Year of
Foundation
1988
Volumes
per Year
1
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0933-4173 (Print)
ISSN 1789-0993 (Online)

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