Abstract
Despite the development of anti-epilepsy drugs, drug-refractory epilepsy still becomes a challenging problem along with an increased incidence of epilepsy. To face that challenge and increase patients’ quality of life, treatment of epilepsy must effectively prevent epileptogenesis, not only symptomatic treatment. AKT signaling pathway was proven to have important roles in epilepsy through its function in the synaptic plasticity, neurogenesis, axon guidance, modulation of the glutamate transporter, and activation of the Ca2+ channel. AKT also activated mTOR signaling pathway as activator of mTORC1 and also effector of mTORC2. Several studies showed the ability of long-term rapamycin treatment to inhibit mTORC2. This study used organotypic hippocampal slice cultures (OHSC) and long-term rapamycin treatment was administered for 3, 5, 8, and 10 days at a dose of 20 nM after induction of epilepsy by low-Mg2+ medium administration for 40 minutes. Low-Mg2+ medium administration induced seizure activity in OHSC showed by significant increase in intracellular Ca2+expressionand also significantly increase AKT activity. After administration of long-term rapamycin treatment AKT activity and intracellular Ca2+expression were significantly reduced. The longer the treatment of rapamycin, the lower the AKT activity and intracellular Ca2+expression. Long-term rapamycin treatment has the potential to become a novel epilepsy drug through its ability to attenuate AKT activity and suppress the seizures proven by lower intracellular Ca2+expression.
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