Amycolasporins and Dibenzoyls from Lichen-Associated Amycolatopsis hippodromi and Their Antibacterial and Anti-inflammatory Activities

J Nat Prod. 2020 Dec 24;83(12):3545-3553. doi: 10.1021/acs.jnatprod.0c00547. Epub 2020 Nov 20.

Abstract

Eleven metabolites, six echinosporins (1-6), four dibenzoyls (7-10), and an aromatic compound (11), were isolated from the fermentation broth of lichen-associated Amycolatopsis hippodromi. The structures of the new compounds (1-5, 8-11) were elucidated by comprehensive spectroscopic analysis including data from experimental and calculated ECD spectra. Amycolasporins A-C (1-3) demonstrated antibacterial activities against Bacillus subtilis, Staphylococcus aureus, and Escherichia coli with MIC values of 25 or 100 μg/mL. Amycolasporin C (3) and the known dibenzoyl (7) attenuated the production of NO due to the suppression of the expression of nitric oxide synthase (iNOS) in LPS-induced RAW 264.7 cells in a dose-dependent manner.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amycolatopsis / chemistry
  • Amycolatopsis / metabolism
  • Animals
  • Anti-Bacterial Agents / pharmacology*
  • Anti-Inflammatory Agents / pharmacology*
  • Benzene Derivatives / chemistry
  • Benzene Derivatives / isolation & purification*
  • Culture Media
  • Fermentation
  • Lactones / chemistry
  • Lactones / isolation & purification
  • Lichens / chemistry*
  • Mice

Substances

  • Anti-Bacterial Agents
  • Anti-Inflammatory Agents
  • Benzene Derivatives
  • Culture Media
  • Lactones
  • echinosporin

Supplementary concepts

  • Amycolatopsis hippodromi