It was reported recently that
allyl isothiocyanate (
AITC) could inhibit various types of
cancer cell growth. In the present study, we further investigated whether
AITC could inhibit the growth of human
breast cancer cells. Unexpectedly, we found that
AITC did not inhibit, rather slightly promoted, the proliferation of MDA-MB-231
breast cancer cells, although it did have inhibitory effect on MCF-7
breast cancer cells. Cytofluorimetric analysis revealed that
AITC (10 µM) did not induce apoptosis and cell cycle arrest in MDA-MB-231 cells. In addition,
AITC significantly (p < 0.05) increased the expression of BCL-2 and mTOR genes and
Beclin-1 protein in MDA-MB-231 cells. No significant changes in expression of PRKAA1 and PER2 genes,
Caspase-8,
Caspase-9, PARP, p-mTOR, and NF-κB p65
proteins were observed in these
AITC-treated cells. Importantly,
AITC displayed cytotoxic effect on MCF-10A human breast epithelial cell line. These observations suggest that
AITC may not have inhibitory activity in MDA-MB-231
breast cancer cells. This in vitro study warrants more preclinical and clinical studies on the beneficial and harmful effects of
AITC in healthy and
cancer cells.