Two new hydroazulenoid (prenyl guaiane) diterpenes, dictyone acetate (2) and 3,4-epoxy 13-hydroxy pachydictyol A (4) were isolated from the petroleum ether fraction of the alcoholic extract of the brown alga, Dictyota dichotoma (Hudson) Lamouroux, which was collected from the Red Sea coasts at Hurgada, Egypt, together with three known ones, pachydictyol A (1), dictyone (3) and 11-hydroxypachydictyol A (dictyol E) (5). In addition, the steroidal compound, stigmasta-5,(E)-24(28)-dien-3-beta-ol (fucosterol) (6) was also isolated. The structures of the isolated compounds have been determined on the basis of spectroscopic evidences as well as physical and chemical correlation with known compounds. Compounds 1, 2, 3 and 5 showed moderate cytotoxic activity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1515/znc-2003-1-203 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Night-break treatment with blue and green lights regulates erect thallus formation in the brown alga (KU-1293).
Front Plant Sci
January 2025
Faculty of Marine Science and Technology, Fukui Prefectural University, Obama, Fukui, Japan.
In this study, we investigated the photoperiodic responses regulating erect thallus formation in (KU-1293). We found that, through critical day length analysis and night break treatment culture experiments, formed erect thalli under short-day conditions, indicating a genuine photoperiodic response. The critical day length for this morphological change was 10-11 h.
View Article and Find Full Text PDFA Cedrane and a Fusarin from the Algicolous Fungus Fusarium graminearum 12Ⅱ2N and Response to Mycoparasitism.
Chem Biodivers
January 2025
Yantai Institute of Coastal Zone Research, Coastal biology and Bioresource Utilization, 17 Chunhui Road, 264003, Yantai, CHINA.
The fungal genus Fusarium is a treasure-trove of structurally diverse secondary metabolites, contributed greatly by marine-derived strains. A new cedrane sesquiterpene, fusacedrol (1), and a new fusarin member, fusarin M (2), were isolated from F. graminearum 12Ⅱ2N that was isolated as an endophyte from the marine brown alga Sargassum sp.
View Article and Find Full Text PDFIshophloroglucin A Isolated from Protects Glomerular Cells from Methylglyoxal-Induced Diacarbonyl Stress and Inhibits the Pathogenesis of Diabetic Nephropathy.
Mar Drugs
January 2025
Division of Functional Food Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea.
(), an edible brown alga, is rich in isophloroglucin A (IPA) phlorotannin compounds and is effective in preventing diseases, including diabetes. We evaluated its anti-glycation ability, intracellular reactive oxygen species scavenging activity, inhibitory effect on the accumulation of intracellular MGO/MGO-derived advanced glycation end products (AGE), and regulation of downstream signaling pathways related to the AGE-receptor for AGEs (RAGE) interaction. IPA (0.
View Article and Find Full Text PDFOptimization of a Sonotrode Extraction Method and New Insight of Phenolic Composition of .
Mar Drugs
January 2025
Institute of Nutrition and Food Technology 'José Mataix', Biomedical Research Center, University of Granada, 18071 Granada, Spain.
The optimization of bioactive compound extraction from using ultrasound-assisted extraction (UAE) via sonotrode was investigated to maximize phenolic recovery and antioxidant activity while promoting a sustainable process. Optimal conditions (40% / ethanol in water, 38 min, 36% amplitude) were selected to maximize phenolic recovery while considering environmental and energy sustainability by optimizing extraction efficiency and minimizing solvent and energy usage. HPLC-ESI-QTOF-MS analysis tentatively identified 25 phenolic compounds, including sulfated phenolic acids, phlorotannins, flavonoids, and halophenols, with some reported for the first time in , underscoring the complexity of this alga's metabolome.
View Article and Find Full Text PDFCellular and biochemical alterations induced by diesel oil in the brown alga Sargassum cymosum var. stenophyllum cultured in vitro.
Chemosphere
January 2025
Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, P. O. Box 476, 88049-900, Florianopolis, SC, Brazil. Electronic address:
The effect of the in vitro acute exposure to diesel oil (0.001%, 0.01%, 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!