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Abstract Title:

Piperlongumine (piplartine) and analogues: Antiproliferative microtubule-destabilising agents.

Abstract Source:

Eur J Med Chem. 2017 Jan 5 ;125:453-463. Epub 2016 Sep 16. PMID: 27689728

Abstract Author(s):

Mary J Meegan, Seema Nathwani, Brendan Twamley, Daniela M Zisterer, Niamh M O'Boyle

Article Affiliation:

Mary J Meegan

Abstract:

Piperlongumine (piplartine, 1) is a small molecule alkaloid that is receiving intense interest due to its antiproliferative and anticancer activities. We investigated the effects of 1 on tubulin and microtubules. Using both an isolated tubulin assay, and a combination of sedimentation and western blotting, we demonstrated that 1 is a tubulin-destabilising agent. This result was confirmed by immunofluorescence and confocal microscopy, which showed that microtubules in MCF-7 breast cancer cells were depolymerized when treated with 1. We synthesised a number of analogues of 1 to explore structure-activity relationships. Compound 13 had the best cytotoxic profile of this series, showing potent effects in human breast carcinoma MCF-7 cells whilst being relatively non-toxic to non-tumorigenic MCF-10a cells. These compounds will be further developed as potential clinical candidates for the treatment of breast cancer.

Study Type : In Vitro Study

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