A eudesmane-type sesquiterpene isolated from <i>Pluchea odorata</i> (L.) Cass. combats three hallmarks of cancer cells

Author(s)
Michael Blaschke, Ruxandra McKinnon, Chi Huu Nguyen, Silvio Holzner, Martin Zehl, Atanas Georgiev Atanasov, Karin Schelch, Sigurd Krieger, Rene Diaz, Richard Frisch, Bjoern Feistel, Walter Jäger, Gerhard F. Ecker, Verena M. Dirsch, Michael Grusch, Istvan Zupko, Ernst Urban, Brigitte Kopp, Georg Krupitza
Abstract

Pluchea odorata is ethno pharmaceutically used to treat inflammation-associated disorders. The dichloromethane extract (DME) was tested in the carrageenan-induced rat paw oedema assay investigating its effect on inflammation that was inhibited by 37%. Also an in vitro anti-neoplastic potential was reported. However, rather limited information about the bio-activity of purified compounds and their cellular mechanisms are available. Therefore, two of the most abundant eudesmanes in P. odorata were isolated and their anti-neoplastic and anti-intravasative activities were studied. HL-60 cells were treated with P. odorata compounds and metabolic activity, cell number reduction, cell cycle progression and apoptosis induction were correlated with relevant protein expression. Tumour cell intravasation through lymph endothelial monolayers was measured and potential causal mechanisms were analyzed by Western blotting. Compound PO-1 decreased the metabolic activity of HL-60 cells (IC50=8.9μM after 72h) and 10μM PO-1 induced apoptosis, while PO-2 showed just weak anti-neoplastic activities at concentrations beyond 100μM. PO-1 arrested the cell cycle in G1 and this correlated with induction of JunB expression. Independent of this mechanism 25μM PO-1 decreased MCF-7 spheroid intravasation through the lymph endothelial barrier. Hence, PO-1 inhibits an early step of metastasis, impairs unrestricted proliferation and induces apoptosis at low micromolar concentrations. These results warrant further testing in vivo to challenge the potential of PO-1 as novel lead compound.

Organisation(s)
External organisation(s)
Medizinische Universität Wien, Finzelberg GmbH & Co KG, University of Szeged, Institute for Ethnobiology, Playa Diana, San José, Petén, Guatemala.
Journal
Mutation Research: fundamental and molecular mechanisms of mutagenesis
Volume
777
Pages
79-90
No. of pages
12
ISSN
1386-1964
DOI
https://doi.org/10.1016/j.mrfmmm.2015.04.011
Publication date
05-2015
Peer reviewed
Yes
Austrian Fields of Science 2012
301904 Cancer research, 301207 Pharmaceutical chemistry, 301204 Pharmacognosy
Keywords
ASJC Scopus subject areas
Genetics, Molecular Biology, Health, Toxicology and Mutagenesis
Sustainable Development Goals
SDG 3 - Good Health and Well-being
Portal url
https://ucris.univie.ac.at/portal/en/publications/a-eudesmanetype-sesquiterpene-isolated-from-pluchea-odorata-l-cass-combats-three-hallmarks-of-cancer-cells(4d323de3-d2ac-427a-908b-6134244d2e02).html