In the present study, we investigated the anti-cancer effect of various potencies
of Ruta graveolens (Ruta) on COLO-205 cell line, as evidenced by cytotoxicity, migration, clonogenecity, morphological
and biochemical changes and modification in the levels of genes associated with apoptosis
and cell cycle. On treatment of COLO-205 cells maximal effects were seen with mother
tincture (MT) and 30C potencies, wherein decrease in cell viability along with reduced
clonogenecity and migration capabilities were noted. In addition morphological and
biochemical alterations such as nuclear changes (fragmented nuclei with condensed
chromatin) and DNA ladder-like pattern (increased amount of fragmented DNA) in COLO-205
cells indicating apoptotic related cell death were seen. The expression of apoptosis
and cell-cycle related regulatory genes assessed by reverse transcriptase-PCR revealed
an up-regulation of caspase 9, caspase-3, Bax, p21 and p27 expression and down-regulation
of Bcl-2 expression in treated cells. The mode of cell death was suggestive of intrinsic
apoptotic pathway along with cell cycle arrest at the G2/M of the cell cycle. Our
findings indicate that phytochemicals present in Ruta showed potential for natural therapeutic product development for colon carcinoma.
Keywords
Ruta
- Apoptosis - Cell cycle arrest - GC–MS