Background: Metastasis often happened in colorectal cancer patients. It is still unclear on
the metastatic mechanism on colorectal cancer. Hence, we used a proteomic method to find the multiplex
markers associated with metastasis. The colorectal cancer cell lines RKO and HT29 had been
identified as the hepatic metastasis model in vitro.
Method: Here, we compared the two cell proteome profiles and found some new molecular events of
CRC metastasis. Using iTRAQ based proteomics method, we identified 1985 specific proteins, out of
which 212 were found to be significantly changed in two cell lines. 28 candidate genes were confirmed
by Q-PCR and 9 candidate proteins were further validated by western blot.
Results: Bioinformatics analysis revealed the altered proteins played roles in actin cytoskeleton, focal
adhesion and so on. KEGG analysis of the altered proteins indicated several signal pathways related to
tumor invasion and metastasis. The expression of some genes was related to epigenetic changes. These
results may supply an perspicacity with some new molecular biomarkers development in colorectal
Conclusion: In a word, this study had identify several novel moleculars for CRC metastasis and development.