Long-term effects of status epilepticus in the immature brain are specific for age and model.

Abstract:

PURPOSE:Status epilepticus (SE) is more common in children than adults and has a high mortality and morbidity rate. SE in adult rats results in long-term disturbances in learning and memory, as well as an enhanced seizure susceptibility to further seizures. In contrast, a number of studies suggest that the immature brain is less vulnerable to the morphologic and physiologic alterations after SE. The goal of this study was to determine whether the long-term consequences of SE during development on hippocampal plasticity and cognitive function are age and model specific. METHODS:We used lithium-pilocarpine (Li-PC) to induce SE at different age points during development (P12, P16, P20) and evaluated the effects of this abnormal neural activity on spatial memory performance and seizure susceptibility in the animals beginning at P55, corresponding to young adulthood. RESULTS:We demonstrated that SE at P12 did not result in any structural or functional changes detectable in adulthood, whereas SE at both P16 and P20 induced cell loss and mossy fiber sprouting within the hippocampus and cognitive impairment when the animals were tested as adults. CONCLUSIONS:Whereas the seizure threshold to generalized seizures was not altered, animals with SE at P20 showed an increased susceptibility to kindling in adulthood.

journal_name

Epilepsia

journal_title

Epilepsia

authors

Cilio MR,Sogawa Y,Cha BH,Liu X,Huang LT,Holmes GL

doi

10.1046/j.1528-1157.2003.48802.x

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

518-28

issue

4

eissn

0013-9580

issn

1528-1167

pii

epi48802

journal_volume

44

pub_type

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