To further investigate whether DFP exposure induces overexpression of other IEGs, we analyzed, by qRT-PCR, the expression in the brain of fosab, atf3, junBa, npas4a, and npas4b, the zebrafish orthologues of C-FOS, JUNB, ATF3, and NPAS4, respectively, four genes that are expressed at high levels in the very first hours that follow epileptic seizures in pharmacological models of epilepsy in rats25. The gene discussed is NPAS4; the disease is epilepsy.