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Mar. Drugs, Volume 3, Issue 2 (June 2005) – 5 articles , Pages 22-77

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Research

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68 KiB  
Article
New Cytotoxic and Antibacterial Compounds Isolated from the Sea Hare, Aplysia kurodai
by Sachiko Tsukamoto, Yuko Yamashita and Tomihisa Ohta
Mar. Drugs 2005, 3(2), 22-28; https://doi.org/10.3390/md302022 - 16 Apr 2005
Cited by 17 | Viewed by 8107
Abstract
The extract of the sea hare, Aplysia kurodai, showed cytotoxicity against HeLa cells and antibacterial activity against Staphylococcus aureus. Bioassay-guided purification afforded four active compounds, which were identified to be laurinterol, laurinterol acetate, debromolaurinterol, and debromolaurinterol acetate by spectroscopic analysis. Although [...] Read more.
The extract of the sea hare, Aplysia kurodai, showed cytotoxicity against HeLa cells and antibacterial activity against Staphylococcus aureus. Bioassay-guided purification afforded four active compounds, which were identified to be laurinterol, laurinterol acetate, debromolaurinterol, and debromolaurinterol acetate by spectroscopic analysis. Although the acetates were derived from laurinterol and debromolaurinterol before, this is the first isolation of the acetates from natural sources. Full article
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73 KiB  
Article
Secomycalolide A: A New Proteasome Inhibitor Isolated from a Marine Sponge of the Genus Mycale
by Sachiko Tsukamoto, Keiichirou Koimaru and Tomihisa Ohta
Mar. Drugs 2005, 3(2), 29-35; https://doi.org/10.3390/md302029 - 01 Jun 2005
Cited by 34 | Viewed by 7702
Abstract
A new oxazole-containing proteasome inhibitor, secomycalolide A, together with known mycalolide A and 30-hydroxymycalolide A, was isolated from a marine sponge of the genus Mycale. They showed proteasome inhibitory activities with IC50 values of 11-45 μg/mL. Full article
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514 KiB  
Article
Quality not Quantity: The Role of Marine Natural Products in Drug Discovery and Reverse Chemical Proteomics
by Andrew M. Piggott and Peter Karuso
Mar. Drugs 2005, 3(2), 36-63; https://doi.org/10.3390/md302036 - 01 Jun 2005
Cited by 28 | Viewed by 13010
Abstract
Reverse chemical proteomics combines affinity chromatography with phage display and promises to be a powerful new platform technology for the isolation of natural product receptors, facilitating the drug discovery process by rapidly linking biologically active small molecules to their cellular receptors and the [...] Read more.
Reverse chemical proteomics combines affinity chromatography with phage display and promises to be a powerful new platform technology for the isolation of natural product receptors, facilitating the drug discovery process by rapidly linking biologically active small molecules to their cellular receptors and the receptors’ genes. In this paper we review chemical proteomics and reverse chemical proteomics and show how these techniques can add value to natural products research. We also report on techniques for the derivatisation of polystyrene microtitre plates with cleavable linkers and marine natural products that can be used in chemical proteomics or reverse chemical proteomics. Specifically, we have derivatised polystyrene with palau’amine and used reverse chemical proteomics to try and isolate the human receptors for this potent anticancer marine drug. Full article
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116 KiB  
Article
Verrucarin A Inhibition of MAP Kinase Activation in a PMA-stimulated Promyelocytic Leukemia Cell Line
by Taiko Oda, Michio Namikoshi, Kyoko Akano, Hisayoshi Kobayashi, Yoshio Honma and Tadashi Kasahara
Mar. Drugs 2005, 3(2), 64-73; https://doi.org/10.3390/md302064 - 02 Jun 2005
Cited by 30 | Viewed by 8857
Abstract
Verrucarin A is an inhibitor of protein synthesis. In this study, we examined the inhibitory action of verrucarin A on signal molecules. Verrucarin A partially inhibited the IL-8 production of a PMA-stimulated promyelocytic leukemia cell line (HL-60 cells), and the effect was related [...] Read more.
Verrucarin A is an inhibitor of protein synthesis. In this study, we examined the inhibitory action of verrucarin A on signal molecules. Verrucarin A partially inhibited the IL-8 production of a PMA-stimulated promyelocytic leukemia cell line (HL-60 cells), and the effect was related to the inhibition of NF-κB activation at noncytotoxic concentrations. Moreover, the inhibition of mitogen activated protein (MAP) kinase by verrucarin A was especially strong with p38- and JNK-phosphorylation. The findings show a new action of verrucarin A, and it is expected that this action relaxes the signal activation in response to stress. Full article
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103 KiB  
Correction
Publisher's Note added on 9 October 2006
by Shu-Kun Lin
Mar. Drugs 2005, 3(2), 74-77; https://doi.org/10.3390/md3020074 - 09 Oct 2006
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Abstract
Publisher's Note added on 9 October 2006 : Pages 74-77 are taken as blank pages. Full article
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