FGF9 and epilepsy: Fgf9 deletion in GABAergic neurons caused neuronal apoptosis and decreased the expression of GABA by activating the adenylatecyclase (AC)/ cyclic AMP (cAMP) and extracellular signal-regulated kinase (ERK) signaling pathway, causing a GABA/Glu imbalance and inducing epilepsy in mice.