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August 14, 2026Marine DrugsOpen Access

Two New Indole Derivatives from the Beibu Gulf Coral-Derived Fungus Pestalotiopsis microspora GXIMD 02530

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Authors

HSHui ShiGuangxi UniversityGYGuihua YangQilu University of TechnologyXLXiaolin LiuGuangxi University

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Implication

In vitro experimental study uncovers novel indole derivatives from marine fungus, indicating potential templates for anti-inflammatory and antibacterial therapies.

Key Points

  • To isolate and structurally characterize secondary metabolites from the coral-associated fungus Pestalotiopsis microspora GXIMD 02530 and assess their biological activities.
  • Extracted fungal metabolites and determined chemical structures and absolute configurations using spectroscopic analysis, electronic circular dichroism (ECD) calculations, single-crystal X-ray diffraction, and chiral chromatography.
  • Evaluated compounds for anti-inflammatory potential via LPS-induced NF-κB luciferase reporter assays and tested antibacterial activity against Gram-positive bacterial strains.
  • Characterized two novel indole derivatives (1 and 2), including the rare racemic tricyclic compound furoindolin A (1), along with fourteen known indole and polyketide compounds.
  • Demonstrated that compounds (±)-1, 3, 4, and 6–12 exhibited inhibitory activity against LPS-induced NF-κB luciferase expression.
  • Showed phomopsilactone (10) exhibited antibacterial activity against Staphylococcus epidermidis (MIC 15.6 μg/mL), Bacillus subtilis (MIC 31.25 μg/mL), and Staphylococcus aureus (MIC 62.5 μg/mL).

Cite This Study

Shi et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec7bab70b84ec8b914541https://doi.org/10.3390/md24080279
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