Amantamides are lipopeptides that act as selective CXC chemokine receptor 7 agonists and modulate spontaneous calcium oscillations in primary cultured neocortical neurons. We isolated a new analog of amantamides, amantamide C, from marine sp. cyanobacterium collected in Japan and established its structure based on NMR and MS/MS analyses, and degradation reactions. In addition, we evaluated the biological activity of amantamide C and revealed novel biological features of amantamide-type compounds.
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http://dx.doi.org/10.1021/acsomega.4c05909 | DOI Listing |
Molecules
January 2025
Department of Pharmacy, University of Pisa, Via Bonanno, 6, 56126 Pisa, Italy.
Hearing loss is one of the most common sensory disorders in humans, and a large number of cases are due to ear cell damage caused by ototoxic drugs including anticancer agents, such as cisplatin. The recent literature reported that hearing loss is promoted by an excessive generation of reactive oxygen species (ROS) in cochlea cells, which causes oxidative stress. Recently, polysaccharides from the cyanobacterium showed many biological activities, including antioxidant activity, suggesting their potential use to combat hearing loss.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy.
In nature, bacteria often form heterogeneous communities enclosed in a complex matrix known as biofilms. This extracellular matrix, produced by the microorganisms themselves, serves as the first barrier between the cells and the environment. It is composed mainly of water, extracellular polymeric substances (EPS), lipids, proteins, and DNA.
View Article and Find Full Text PDFOrg Lett
January 2025
Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
Human African trypanosomiasis (HAT) is one of the most lethal of the neglected tropical diseases. While the discovery of a novel antitrypanosomal drug is highly desired, the creation of a superior lead compound is challenging. Herein we report ukabamide (), which was isolated from a marine sp.
View Article and Find Full Text PDFMetab Eng
January 2025
Engineering Biology Research Center, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; Graduate School of Science, Technology, and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan; Research Center for Sustainable Resource Science, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan. Electronic address:
Polyhydroxyalkanoate (PHA) is an attractive bio-degradable plastic alternative to petrochemical plastics. Photosynthetic cyanobacteria accumulate biomass by fixing atmospheric CO, making them promising hosts for sustainable PHA production. Conventional PHA production in cyanobacteria requires prolonged cultivation under nutrient limitation to accumulate cellular PHA.
View Article and Find Full Text PDFPhilos Trans R Soc Lond B Biol Sci
January 2025
Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Hong Kong, China.
Bacterial extracellular vesicles (EVs) are vesicles secreted by bacteria into the extracellular environment. Containing DNA, RNA and proteins, EVs are implicated to mediate intercellular communications. The marine cyanobacterium , the most abundant photosynthetic organism in marine ecosystems, has been shown to generate EVs continuously during cell growth.
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