Two new -carboline alkaloids, aspergillspins A-B (-), three new quinolone alkaloids, aspergillspins C-E (-), and two new isocoumarins, aspergillspins F-G (-), together with four known alkaloids were isolated from the marine gorgonian-derived fungus sp. SCSIO 41501. Their structures were identified by spectroscopic analysis, and the absolute configurations of several chiral carbons in and were further established by quantum chemical calculations of the electronic circular dichroism (ECD) spectra. Their cytotoxic and antibacterial activities were also evaluated.
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http://dx.doi.org/10.1080/14786419.2019.1569660 | DOI Listing |
Phytomedicine
December 2024
State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, PR China; Institute of Ocean Research, Ningbo Institute of Marine Medicine, Peking University, Beijing, 100191, PR China. Electronic address:
Background: Marine diterpenes represent a promising reservoir for identifying potential anti-rheumatoid arthritis (RA) candidates. Praelolide is a gorgonian-derived briarane-type diterpenoid with antioxidative and anti-osteoclastogenetic properties.
Objective: This study aims to evaluate the therapeutic efficacy of praelolide against RA and investigate its underlying mechanisms both in vivo and in vitro.
Phytochemistry
November 2022
State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, PR China; Ningbo Institute of Marine Medicines, Peking University, Ningbo, 315832, PR China. Electronic address:
Notoamides are a family of prenylated indole alkaloids with unusual ring systems and possessing a range of significant pharmaceutical activities. Based on LC-MS/MS and genome orientations, ten undescribed notoamide-type alkaloids namely sclerotiamides I-R were isolated from a marine gorgonian-derived fungus Aspergillus sclerotiorum LZDX-33-4. Their structures were determined by extensive spectroscopic data, in association with ECD data and single-crystal X-ray diffraction for configurational assignments.
View Article and Find Full Text PDFJ Nat Prod
July 2022
Institute of Chemistry, Technical University of Berlin, Berlin 10623, Germany.
Natural product dimers have intriguing structural features and often have remarkable pharmacological activities. We report here two uncommon marine gorgonian-derived symmetric dimers, weizhouochrones A () and B (), with indenone-derived monomers, that were isolated from the coral collected from the South China Sea. These dimers are difficult targets for structure elucidation that solely relies upon conventional NMR data such as NOEs and -couplings.
View Article and Find Full Text PDFJ Nat Prod
April 2022
State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, People's Republic of China.
Bioassay-guided fractionation in association with LC-MS and NMR detection led to the isolation of six new alkaloids, sclerotiamides C-H (-), from the marine gorgonian-derived fungus LZDX-33-4. Their structures were determined from extensive spectroscopic data, including ECD data and single-crystal X-ray diffraction analysis for configurational assignments. Sclerotiamides C () and D () are notoamide-type alkaloids with the incorporation of a unique 2,2-diaminopropane unit, and sclerotiamides E () and F () are unprecedented notoamide hybrids with a new coumarin unit.
View Article and Find Full Text PDFBioorg Med Chem
August 2020
State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China; Institute of Ocean Research, Peking University, Beijing 100875, PR China. Electronic address:
HBV infection is a common cause of liver disease with a high burden worldwide. Current therapeutic strategy relies on interferon and nucleos(t)ide-type drugs with the limitation of functional cure. In this study, a structure-based screening of marine natural products from an in-house library was performed to hit HBV inhibitors, and the gorgonian-derived briarane-type diterpenoids showed inhibitory effects against HBV DNA replication in HepAD38 cells.
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