5-Fluorouracil (5-FU) is the major chemotherapeutic agent for the treatment of
colorectal carcinoma, which were found to have N-
glycans containing
polylactosamine on the
cancer cell surface. Alterations in the expression and structure of
polylactosamine glycans are associated with cellular differentiation and
oncogenesis. However, little is known with regard to the correlation between the levels of
polylactosamine expressed in
colon cancer cells and the anticancer effect of
5-FU. In the present study, SW620 cells were treated with the half maximal inhibitory concentration (IC50; determined by MTT-assay) of
5-FU.
Hoechst 33258 staining and flow cytometric analysis indicated that
5-FU administration resulted in apoptosis in SW620 cells. An increased percentage of cells in S phase was also observed among the SW620 cells treated with
5-FU. Under the same experimental conditions, a decrease in the 5-FU‑induced inhibition of
polylactosamine glycans was recorded. However, an increase in the activity of
alkaline phosphatase was also observed. Furthermore, pretreatment of the SW620 cells with
5-FU inhibited the expression of β1,3-N-acetylglucosaminyltransferase-8 (β3Gn-T8) and cluster of differentiation (CD)147 in a time-dependent manner. Overall, changes in glycosylation were associated with the anticancer effect of
5-FU in the
colon cancer cells. In conclusion,
polylactosamine may be a useful target for the identification of substances with anticancer activity.