BDNF and glaucoma: In previous studies, we analysed microglial activation [9,10,11,12,13] and the expression of different proinflammatory cytokines (IL-1β, IL-6, IL-17, IFN-γ, TNF-α), anti-inflammatory cytokines (IL-4 and IL-10), BDNF, VEGF, and fractalkine (CX3CL1) [14] in a mouse model of glaucoma at different time points (1, 3, 5, 7, and 15 days) after ocular hypertension (OHT) induction.