New synthetic inhibitors of fatty acid synthase with anticancer activity

Abstract

Fatty acid synthase (FASN) is a lipogenic enzyme that is highly expressed in different human cancers. Here we report the development of a new series of polyphenolic compounds 5-­30 that have been evaluated for their cytotoxic capacity in SK-­Br3 cells, a human breast cancer cell line with high FASN expression. The compounds with an IC50 < 50 ����M have been tested for their ability to inhibit FASN activity. Among them, derivative 30 blocks the 90% of FASN activity at low concentration (4 ����M), is highly cytotoxic in a broad panel of tumor cells, induces apoptosis, and blocks the activation of HER2, AKT and ERK pathways. Remarkably, 30 does not activate carnitine palmitoyltransferase-­1 (CPT-­1) nor induces in mice weight loss, which are the main drawbacks of other previously described FASN inhibitors. Thus, FASN inhibitor 30 may aid the validation of this enzyme as a therapeutic target for the treatment of cancer.