CD8A and melanoma: IL-7 mediated the elevation of sCD127 secretion by peripheral CD8+ T cells from both melanoma patients (137.6 ± 17.09 pg/mL vs. 112.9 ± 13.84 pg/mL; P < 0.0001, Fig. 2h) and controls (165.7 ± 21.91 pg/mL vs. 133.8 ± 15.10 pg/mL; P = 0.0024, Fig. 2h).