RT Journal Article SR Electronic T1 Mepacrine Antagonises Tumour Cell Growth Induced by Natural Polyamines JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 2765 OP 2768 VO 28 IS 5A A1 ROSSI, TIZIANA A1 COPPI, ANDREA A1 BRUNI, ELISA A1 RUBERTO, ANTONIO A1 GIUDICE, STEFANIA A1 BAGGIO, GIOSUÉ YR 2008 UL http://ar.iiarjournals.org/content/28/5A/2765.abstract AB Background: Mepacrine is an antiproliferative agent, characterised by an aliphatic chain similar to that of natural polyamines whose activation is closely associated with cell proliferation and may lead to malignant transformation and neurodegenerative diseases. This study aims to investigate a possible antagonism between mepacrine and polyamines in tumour proliferation. Materials and Methods: MCF-7 and Vero cells were cultured in Eagle's minimum essential medium and then subjected to graded concentrations of putrescine, spermine and spermidine alone and in combination with mepacrine. Methyl thiazole tetrazolium test and Western-blotting were performed. Results: Putrescine and spermidine at 0.5 mg/l significantly stimulated cell growth, whereas mepacrine treatment confirmed the enhanced p21 expression previously reported by a recent study and growth inhibition. When used in combination, mepacrine antagonized MCF-7 growth induced by polyamines. Conclusion: Our results suggest that mepacrine may represent a choice in the treatment of tumours induced by the modified concentration of polyamines.