Fig. 1

Serum DJ-1 expression correlates tumor progression and upregulates from ESCC cells for irradiation. A ELISA results of DJ-1 levels in serum of ESCC patients (n = 177) and normal donors (n = 50). B-C The expression of DJ-1 in serum of ESCC patients at multiple stages (T and N) by ELISA. D ELISA results of DJ-1 levels in serum of ESCC patients (n = 46) at the point of before and after radiotherapy (40 Gy). E–F ELISA results of DJ-1 expression in medium of 6 ESCC cell lines at the point of 2 h after 6 Gy-irradiation. G-H ELISA results of DJ-1 expression in medium of K150 and E109 cells at the point of 2 h after receiving multiple doses (0, 2, 4, 6, 8 and 10 Gy) of irradiation. I-J ELISA results of DJ-1 expression in medium of K150 and E109 cells at multiple timing (0.5, 1, 2, 4, 8, 12 and 24 h) after receiving 8 Gy irradiation. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001