Cytotoxic 14-Membered Macrolides from a Mangrove-Derived Endophytic Fungus, Pestalotiopsis microspora

Shuai Liu, Haofu Dai, Gamall Makhloufi, Christian Heering, Christoph Janiak, Rudolf Hartmann, Attila Mándi, T. Kurtán, Werner E G Müller, Matthias U. Kassack, Wenhan Lin, Zhen Liu, Peter Proksch

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38 Citations (Scopus)


Seven new 14-membered macrolides, pestalotioprolides C (2), D-H (4-8), and 7-O-methylnigrosporolide (3), together with four known analogues, pestalotioprolide B (1), seiricuprolide (9), nigrosporolide (10), and 4,7-dihydroxy-13-tetradeca-2,5,8-trienolide (11), were isolated from the mangrove-derived endophytic fungus Pestalotiopsis microspora. Their structures were elucidated by analysis of NMR and MS data and by comparison with literature data. Single-crystal X-ray diffraction analysis was used to confirm the absolute configurations of 1, 2, and 10, while Mosher's method and the TDDFT-ECD approach were applied to determine the absolute configurations of 5 and 6. Compounds 3-6 showed significant cytotoxicity against the murine lymphoma cell line L5178Y with IC50 values of 0.7, 5.6, 3.4, and 3.9 μM, respectively, while compound 5 showed potent activity against the human ovarian cancer cell line A2780 with an IC50 value of 1.2 μM. Structure-activity relationships are discussed. Coculture of P. microspora with Streptomyces lividans caused a roughly 10-fold enhanced accumulation of compounds 5 and 6 compared to axenic fungal control.

Original languageEnglish
Pages (from-to)2332-2340
Number of pages9
JournalJournal of Natural Products
Issue number9
Publication statusPublished - Sep 23 2016

ASJC Scopus subject areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

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    Liu, S., Dai, H., Makhloufi, G., Heering, C., Janiak, C., Hartmann, R., Mándi, A., Kurtán, T., Müller, W. E. G., Kassack, M. U., Lin, W., Liu, Z., & Proksch, P. (2016). Cytotoxic 14-Membered Macrolides from a Mangrove-Derived Endophytic Fungus, Pestalotiopsis microspora. Journal of Natural Products, 79(9), 2332-2340.