Background: Colorectal cancer is the third most commonly diagnosed cancer in the world, causing
many deaths every year. Combined chemotherapy has opened a new horizon in treating colorectal cancer. The
objective of the present study is to investigate the activity of oxaliplatin in combination with emetine and patulin
against colorectal cancer models.
Materials and Methods: IC50 values of oxaliplatin, emetine and patulin were determined against human colorectal
cancer cell lines (HT-29 and Caco-2) using MTT reduction assay. Synergistic, antagonistic and additive
effects from the selected binary combinations were determined as a factor of sequence of administration and
added concentrations. Proteomics was carried out to identify the proteins which were accountable for combined
drug action applying to the selected drug combination.
Results: Oxaliplatin in combination with patulin produced synergism against human colorectal cancer models
depending on dose and sequence of drug administration. Bolus administration of oxaliplatin with patulin proved
to be the best in terms of synergistic outcome. Altered expressions of nine proteins (ACTG, PROF1, PPIA,
PDIA3, COF1, GSTP1, ALDOA, TBA1C and TBB5) were considered for combined drug actions of oxaliplatin
Conclusion: Bolus administration of oxaliplatin with patulin has the potential to be used in the treatment of
colorectal cancer, and would warrant further evaluation using suitable animal model.