The secretion of multiple NFs 72 h after LV/c-Jun transduction. The secretion of GDNF (A), BDNF (B), Artn (C), LIF (D), NGF (E), and NT-3 (F) was determined in the LV/c-Jun, LV/GFP and NT groups through enzyme-linked immunosorbent assay. Graph bars: mean±SD; *p<0.05.