Improvement of resistance to oxaliplatin by vorinostat in human colorectal cancer cells through inhibition of Nrf2 nuclear translocation.

Vorinostat (suberoylanilide hydroxamic acid: SAHA), a histone deacetylase inhibitor, has potential benefit of improving the resistance to conventional other anti-cancer drugs. This study was aimed to clarify whether SAHA improves the resistance to oxaliplatin (L-OHP), a platinum-based anticancer drug using L-OHP-resistant HCT116 cells (HCT116/OxR), established from colorectal cancer (CRC) cell line HCT116. HCT116/OxR cells showed cross-resistance to other platinum-based drugs.