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Marine actinomycetes produce a substantial number of natural products with cytotoxic activity. The strains of actinomycetes were isolated from different sources like fishes, coral, sponges, seaweeds, mangroves, sediments etc. These cytotoxic compounds can be categorized briefly into four classes: polyketides, non-ribosomal peptides and hybrids, isoprenoids and hybrids, and others, among which majority are polyketides (146). Twenty two out of the 254 compounds showed potent cytotoxicity with IC values at ng/mL or nM level. This review highlights the sources, structures and antitumor activity of 254 natural products isolated from marine actinomycetes, which were new when they were reported from 1989 to 2020.
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http://dx.doi.org/10.15212/amm-2022-0028 | DOI Listing |
Mar Pollut Bull
September 2025
Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address:
Coastal sediments in semi-enclosed bays are particularly susceptible to contamination due to limited water circulation and ongoing contaminant input. In Masan Bay, a heavily impacted coastal area in Korea, sediment remediation is essential to alleviate the effects of organic enrichment and hypoxia. This study investigated the effectiveness of oyster shell capping as an in-situ remediation technique by assessing its impact on sediment environment, microbial communities, and macrobenthic fauna.
View Article and Find Full Text PDFBiology (Basel)
August 2025
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are promising molecular biomarkers widely applied in paleoenvironmental reconstructions, including temperature and pH. However, knowledge of the microorganisms responsible for brGDGT production in marine environments remains limited, which constrains the further development and application of brGDGT-based proxies for reconstructing past marine conditions. In this study, both 'living' intact polar lipid-derived brGDGTs (IPL-brGDGTs) and 'fossil' core brGDGTs (CL-brGDGTs), together with bacterial community compositions, were analysed in multiple sediment cores collected along a nearshore-to-offshore transect in the East China Sea (ECS).
View Article and Find Full Text PDFBiotechnol Rep (Amst)
September 2025
Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 250001, Colombia.
Quorum sensing (QS) regulates virulence factors in bacteria associated with acne vulgaris. Consequently, extracts from marine actinobacteria sourced from Colombian Caribbean sponges and octocorals were screened for quorum quenching (QQ) and anti-biofilm activity. The most promising extract, G12.
View Article and Find Full Text PDFInt J Mol Sci
August 2025
Food, Nutrition and Natural Product Chemistry Laboratory, School of Science and Technology, Bangladesh Open University, Gazipur 1705, Bangladesh.
The widespread emergence of resistant pathogenic microorganisms are diminishing the effectiveness of existing antimicrobial drugs, posing an enormous threat to global public health. This phenomenon, known as antimicrobial resistance (AMR), is primarily driven by the misuse and overuse of antimicrobial drugs. Natural product researchers around the globe, in response to antibiotics resistance, are searching for new antimicrobial lead compounds from unexplored or underexplored ecological niches such as the marine environment.
View Article and Find Full Text PDFMar Drugs
July 2025
Pharmaceutical Sciences Division, University of Wisconsin-Madison, Madison, WI 53705, USA.
During the course of genome mining initiatives, we identified a marine-derived , assigned here as strain WMMD956; the genome of WMMD956 appeared to contain a number of features associated with everninomicins, well-known antimicrobial orthosomycins. In addition, LCMS-based hierarchical clustering analysis and principal component analysis () revealed that WMMD956 displayed an extreme degree of metabolomic and genomic novelty. Dereplication of high-resolution tandem mass spectrometry (HRMS/MS) and Global Natural Product Social molecular networking platform (GNPS) analysis of WMMD956 resulted in the identification of several analogs of the previously known everninomicin.
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