Extra Virgin Olive Oil Shown To Fight Breast Cancer

Spanish researchers have discovered that extra virgin olive oil may help to combat breast cancer. The scientists have confirmed the bioactivity of polyphenols (natural antioxidants) present in olive oil in breast cancer cell lines.

The study, by scientists from Catalonian Institute of Oncology (ICO; Barcelona, Spain) and the University of Granada (Spain), has validated the anti-HER2 effect of fractions of phenolic compounds, directly extracted from extra virgin olive oil, in breast cancer cell lines. They have used solid-phase extraction methods of semi-preparative liquid chromatography to isolate fractions of commercial oils and, later, separation techniques (capillary electrophoresis and liquid chromatography connected to mass spectrometry) to verify the purity and composition of the fractions.

Such fractions were tested in their anticancer capacity both against positive HER2 and negative HER2 breast cancers, using in vitro models and evaluating the effect of polyphenolic fractions in the expression and activation of HER2 oncoprotein through ELISA specific methods for HER2. Fractions containing polyphonels such as hydroxitirosol, tirosol, elenolic acid, lignans, pinoresinol and acetopinoresinol, and secoiridoids, diacetox oleuropein aglycone, ligustrosid aglycone, and oleuropein aglycone were able to induce important tumoricid effects in a range of micromolar and in a selective way against HER2 oncogene.

Therefore, this study confirmed, according to the investigators, the potentiality of polyphenols to inhibit HER2 activity and to promote its degradation. Such results, together with the fact that humans have consumed secoiridoids and lignans safely for a long time through oil and olive oil consumption, endorse the fact that such phytochemicals could be an excellent and safe basis for the design of new antiHER2 compounds.

This research group of the department of analytical chemistry at the University of Granada (Spain) has developed other interesting research studies in the characterization of polyphenolic profiles of an important number of plants and metabolomic studies of extracts with proved bioactivity through the use of advanced separation techniques.

The study was published in December 2008 in the open access journal BMC Cancer.

Related Links:
Catalonian Institute of Oncology
University of Granada