New Cytotoxic 24-Homoscalarane Sesterterpenoids from the Sponge Ircinia felix

Int J Mol Sci. 2015 Sep 11;16(9):21950-8. doi: 10.3390/ijms160921950.

Abstract

Two new 24-homoscalarane sesterterpenoids, felixins F (1) and G (2), were isolated from the sponge Ircinia felix. The structures of new homoscalaranes 1 and 2 were elucidated by extensive spectroscopic methods, particularly with one-dimensional (1D) and two-dimensional (2D) NMR, and, by comparison, the spectral data with those of known analogues. The cytotoxicity of 1 and 2 against the proliferation of a limited panel of tumor cell lines was evaluated and 1 was found to show cytotoxicity toward the leukemia K562, MOLT-4, and SUP-T1 cells (IC50 ≤ 5.0 μM).

Keywords: Ircinia felix; cytotoxicity; homoscalarane; sesterterpenoid; sponge.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Line
  • Cell Proliferation / drug effects
  • Humans
  • Molecular Structure
  • Porifera / chemistry*
  • Sesterterpenes / chemistry*
  • Sesterterpenes / toxicity*

Substances

  • Sesterterpenes