Fig. 2From: 5-Methoxytryptophan enhances the sensitivity of sorafenib on the inhibition of proliferation and metastasis for lung cancer cellsSynergistic inhibitory effect of the combination treatment of sorafenib and 5-MTP on the cell viability and proliferation of LLC cells. (A) Combination treatment showed a synergistic inhibitory effect on the growth of LLC cells compared to the single treatments in cytotoxicity assay. (B) The combination treatment induced the inhibition effect on cell proliferation. Asterisks indicate a significant difference in drug-treated cells at indicated concentrations singly compared to DMSO-treated cells. *P < 0.05Back to article page