Status epilepticus in immature rats leads to behavioural and cognitive impairment and epileptogenesis

The European Journal of Neuroscience
Hana KubováA Pitkanen

Abstract

It remains under dispute whether status epilepticus (SE) in the perinatal period or early childhood or the underlying neuropathology is the cause of functional impairment later in life. The present study examined whether SE induced by LiCl-pilocarpine in normal immature brain (at the age of 12 or 25 days; P12 or P25) causes cognitive decline and epileptogenesis, and the data were compared to those of rats undergoing SE as adults. Rats in the P12 group had impaired memory (repeated exposure to open-field paradigm) and emotional behaviour (lower proportion of open-arm entries and higher incidence of risk assessment period in elevated plus-maze) when assessed 3 months after SE, although not as severe as in the older age groups. Importantly, video-electroencephalography monitoring 3 months after SE demonstrated that 25% of rats in the P12 and 50% in P25 group developed spontaneous seizures. Only nonconvulsive seizures (ictal activity in hippocampus accompanied by automatisms) were recorded in the P12 group whereas rats in the P25 group exhibited clonic convulsions. The present findings indicate that SE is harmful to the immature brain as early as P12, which might be compared with early infancy in humans.

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Citations

Aug 17, 2010·Journal of Neural Transmission·Adelisandra Silva Santos CastelhanoRoberta Monterazzo Cysneiros
Jul 7, 2009·Nature Reviews. Neurology·Sanjay N Rakhade, Frances E Jensen
Jun 16, 2007·Epilepsia·Morris H ScantleburySolomon L Moshé
Aug 18, 2009·Epilepsia·Aristea S Galanopoulou, Solomon L Moshé
Apr 11, 2006·Epilepsy Currents·Claude G Wasterlain
Aug 11, 2010·Epilepsy Currents·F Edward DudekKevin J Staley
Sep 8, 2012·Epilepsy Research and Treatment·Emilie Sheppard, Sarah Lippé
Jan 16, 2013·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·Sandro Daniel CórdovaDiogo Losch de Oliveira
Aug 7, 2012·Journal of the Neurological Sciences·Takeshi MatsushigeTakashi Ichiyama
Aug 24, 2010·Seminars in Pediatric Neurology·Karthik RajasekaranHoward P Goodkin
Oct 7, 2008·Epilepsy & Behavior : E&B·Asla Pitkänen, Katarzyna Lukasiuk
Jan 8, 2008·Epilepsy Research·Grygoriy TsenovPavel Mares
Mar 14, 2014·Epilepsia·Jean-Baptiste FaureJean-Christophe Cassel
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Jun 28, 2011·Epilepsy & Behavior : E&B·Hélène RoyMaryse Lassonde

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