Novel Caryophyllane-Related Sesquiterpenoids with Anti-Inflammatory Activity from Rumphella antipathes (Linnaeus, 1758)

Mar Drugs. 2020 Nov 6;18(11):554. doi: 10.3390/md18110554.

Abstract

Two previously undescribed caryophyllane-related sesquiterpenoids, antipacids A (1) and B (2), with a novel bicyclo[5.2.0] core skeleton, and known compound clovane-2β,9α-diol (3), along with rumphellolide L (4), an esterified product of 1 and 3, were isolated from the organic extract of octocoral Rumphella antipathes. Their structures, including the absolute configurations were elucidated by spectroscopic and chemical experiments. In vivo anti-inflammatory activity analysis indicated that antipacid B (2) inhibited the generation of superoxide anions and the release of elastase by human neutrophils, with IC50 values of 11.22 and 23.53 μM, respectively, while rumphellolide L (4) suppressed the release of elastase with an IC50 value of 7.63 μM.

Keywords: Rumphella antipathes; antipacid; caryophyllane; clovane; elastase; rumphellolide; superoxide anion.

Publication types

  • Comparative Study

MeSH terms

  • Animals
  • Anthozoa / metabolism*
  • Anti-Inflammatory Agents / isolation & purification
  • Anti-Inflammatory Agents / pharmacology*
  • Humans
  • Leukocyte Elastase / metabolism
  • Molecular Structure
  • Neutrophils / drug effects*
  • Neutrophils / metabolism
  • Polycyclic Sesquiterpenes / isolation & purification
  • Polycyclic Sesquiterpenes / pharmacology*
  • Structure-Activity Relationship
  • Superoxides / metabolism

Substances

  • Anti-Inflammatory Agents
  • Polycyclic Sesquiterpenes
  • Superoxides
  • ELANE protein, human
  • Leukocyte Elastase