A Synergistic Combination of Oleanolic Acid and Apatinib to Enhance Antitumor Effect on Liver Cancer Cells and Protect against Hepatic Injury

As a pentacyclic triterpenoid, OA (oleanolic acid) has exhibited antiinflammatory, immunomodulatory and antitumor effects. VEGFR-2 (vascular endothelial cells receptor-2) tyrosine kinase activity could be inhibited by apatinib, a small-molecule antiangiogenic agent.Thus, this study sought to investigate the mechanism underlying the synergistic antitumor activity of combined OA and apatinib patent.Through CCK8 (Cell counting kit 8 assay), flow cytometric and western blotting techniques, we conducted in vitro studies on apatinib and OA effects on cell proliferation and apoptosis in H22 cell line. H22 tumor-burdened mice model was established in vivo, while the related signaling pathways were studied via pathological examination, western blotting and qPCR (quantitative polymerase chain reaction).Growth of H22 cells in vitro and in vivo could be inhibited effectively by apatinib and OA. Thus, OA repaired liver function and inhibited oxidative stress induced by apatinib.OA can treat apatinib induced liver injury in H22 Tumor-burdened mice by enhancing the suppresssive effect of apatinib on the growth of tumor.