Several other neuroprotective neurotrophic factors have shown beneficial effects in RP models, such as brain-derived neurotrophic factor (BDNF), basic fibroblast growth factor (bFGF), pigment epithelium–derived factor (PEDF), and glial cell–derived growth factor (GDNF) (McGee Sanftner et al., 2001; Scholl et al., 2016). Here, FGF2 is linked to retinitis pigmentosa 1.