期刊
MARINE DRUGS
卷 17, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/md17080472
关键词
Acanthostrongylophora ingens; marine sponge; halicyclamine derivative; diketopiperazine; alkaloid; bipiperidine scaffold; kinase inhibitor; antimicrobial activity; inhibitor of amyloid beta-42
资金
- European Union 7th Framework Program (BlueGenics FP7-KBBE-2012-6) [311848]
- Regione Campania-POR Campania FESR 2014/2020 Campania Oncoterapie [B61G18000470007]
Thirteen nitrogen-containing molecules (1a/1b and 2-12) were isolated from the Indonesian sponge Acanthostrongylophora ingens, highlighting the richness of this organism as a source of alkaloids. Their structures were elucidated using one- and two-dimensional NMR spectroscopy and HR-ESI-MS, while the stereochemistry of the diketopiperazines was established using Marfey's method. All compounds were screened in our standard bioactivity assays, including antibacterial, antikinases, and amyloid beta-42 assays. The most interesting bioactivity result was obtained with the known acanthocyclamine A (3), which revealed for the first time a specific Escherichia coli antimicrobial activity and an inhibitory effect on amyloid beta-42 production induced by aftin-5 and no cytotoxicity at the dose of 26 mu M. These results highlight the potentiality of a bipiperidine scaffold as a promising skeleton for preventing or reducing the production of amyloid beta-42, a key player in the initiation of Alzheimer's disease.
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