This diversity of mechanisms of tumorigenesis suggests
that there are probably various processes that could be
critical targets for prevention of tumor. In an attempt to
explore the effects as well as underlying mechanisms of
2-MCA in human colorectal adenocarcinoma COLO
205 cells, we performed a series of experiments to delineate
the effects of 2-MCA on proliferation and activities of
topoisomerase I and II in COLO 205 cells. Our results
implicate that 2-MCA inhibited both topoisomerase I and
II activities as well as increased lysosomal vacuolation
with elevated volume of acidic compartment (VAC) and
cytotoxicity. Finally, 2-MCA induced apoptosis, leading
to the inhibition of cell growth, both in vitro and in vivo.