MIR155HG and epilepsy: In this work, the observed physiological alterations in LTP induction and expression, together with the alterations in the molecular composition of synapses, provide a good insight on the very early alterations of synaptic plasticity in adult rodents following two forms of epileptiform activity: (1) seizure-like activity (the one induced by bicuculline, 10 μM, Bic) and (2) neuronal interictal-like activity (induced by Mg2+ suppression, 0Mg2+), characteristic resting brain activity pattern of epilepsy patients, often observed in the latent period of epileptogenesis in animal models.