1. Cyclic peroxides and analogs: Antibacterial, antimalarial, and cytotoxic marine products from Xisha sponge Diacarnus sp.
- Author
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Leng X, He H, Lazaro JEH, Chen X, Ouyang H, Li T, Yan X, and He S
- Subjects
- Humans, Animals, Molecular Structure, Antineoplastic Agents pharmacology, Antineoplastic Agents chemistry, Antineoplastic Agents isolation & purification, Drug Screening Assays, Antitumor, Apoptosis drug effects, Parasitic Sensitivity Tests, Plasmodium falciparum drug effects, Structure-Activity Relationship, Microbial Sensitivity Tests, Cell Line, Tumor, Dose-Response Relationship, Drug, Cell Survival drug effects, Cell Proliferation drug effects, Antimalarials pharmacology, Antimalarials chemistry, Antimalarials isolation & purification, Porifera chemistry, Peroxides pharmacology, Peroxides chemistry, Peroxides isolation & purification, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents isolation & purification
- Abstract
A chemical investigation of the dichloromethane extract from the Xisha sponge Diacarnus sp. revealed seven undescribed norterpene cyclic peroxides, named diacarperoxides T-Z, and five unreported related norterpenes, named diacarnoids E-I, and eleven previously reported compounds. The structures of these isolated compounds, including their absolute configurations, were elucidated based on extensive spectroscopic analyses, electronic circular dichroism (ECD) calculations, Snatzke's method, [Rh
2 (OCOCF3 )4 ]-induced ECD spectra, and modified Mosher's method. Bioassays were performed to assess the antibacterial activity against six pathogenic bacteria, cytotoxicities toward three cancer cell lines, and antimalarial activity against Plasmodium parasites. Most of the cyclic peroxides exhibited substantial antibacterial activity (MIC 1-8 μg/mL). Diacarperoxide W and nuapapuin A showed substantial antimalarial activity with IC50 values of 0.98 and 2.83 μM. Moreover, many compounds exhibited <50% cell survival rates, and IC50 values of 0.22-6.33 μM. The apoptosis assay showed that nuapapuin A induced cancer cell apoptosis in a dose-dependent manner., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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