Fig. 3: PRMT1 enhances chemoresistance of esophageal TICs.

a, b Flow cytometric analysis showed that the percentage of OV6+ cells was significantly increased in LV-PRMT1 cells compared with LV-GFP cells. Data are shown as the mean ± SD, *P < 0.05, **P < 0.01. c, d Flow cytometric analysis revealed that the standard 4 days of chemotherapy with cis-platinum (2.5 g/ml) augmented the percentage of OV6+ subpopulation in ECA109 and TE1 cells. Data are presented as mean ± SD *P < 0.05, **P < 0.01. DDP, cis-platinum. e Cyclocystokinin-8 assay (CCK8) indicated that PRMT1 overexpression enhanced the cell viability of ECA109 and TE1 OV6+ cells in the presence of cis-platinum (0.6 g/ml). Data are shown as the mean ± SD, P < 0.01. f, g Increased ability of colony formation was also observed in LV-PRMT1 groups compared with LV-GFP groups after treated with cis-platinum (0.6 g/ml) for 14 days. Data are presented as the mean ± SD *P < 0.05, **P < 0.01. All experiments were performed in triplicates