Background: Perampanel is a highly selective and non-competitive α-amino-3-hydroxy-
5 -methyl-4-isoxazole propionate (AMPA) receptor (AMPAR) antagonist, which has been licensed
as an orally administered antiepileptic drug in more than 55 countries. Recently, perampanel
was found to exert neuroprotective effects in hemorrhagic and ischemic stroke models.
Objective: In this study, the protective effect of perampanel was investigated.
Methods: The protective effect of perampanel was investigated in an in vitro Traumatic Neuronal
Injury (TNI) model in primary cultured cortical neurons.
Results: We found that perampanel significantly preserved morphological changes, attenuated lactate
dehydrogenase (LDH) release and inhibited caspase-3 activation after TNI. The TNI-induced
necroptosis, as evidenced by flow cytometry, was markedly reduced by perampanel treatment. The
results of western blot showed that perampanel decreased the expression and phosphorylation of
the necroptotic factors, receptor protein interacting kinase 1 (RIPK1) and RIPK3. In addition, treatment
with perampanel increased the phosphorylation of Akt and GSK3β in a time-dependent manner
up to 24 h after TNI. Treatment with the Akt inhibitor LY294002 partially reversed the protective
effects of perampanel.
Conclusion: Our present data suggest that necroptosis plays a key role in the pathogenesis of neuronal
death after TNI, and that perampanel might have therapeutic potential for patients with Traumatic
Brain Injury (TBI).