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  • Title: Status epilepticus induced by lithium-pilocarpine in the immature rat does not change the long-term susceptibility to seizures.
    Author: Nehlig A, Dubé C, Koning E.
    Journal: Epilepsy Res; 2002 Sep; 51(1-2):189-97. PubMed ID: 12350394.
    Abstract:
    The causal relationship between early seizures and subsequent temporal lobe epilepsy has not yet been established. Prospective clinical studies reported that seizures occurring early in life rarely result in hippocampal sclerosis. Likewise, in most experimental models, early seizures occurring before the end of the second postnatal week do not lead to neuronal damage and subsequent epilepsy. In some models, this early event decreases latency sensitivity and threshold to seizures. In the present study, we induced lithium and pilocarpine status epilepticus (SE) in 10-day-old (P10) rats. The goal of this study was to determine whether this early life SE altered the sensitivity to convulsants such as pentylenetetrazol (20 and 25 mg/kg), picrotoxin (2.5 and 4.0 mg/kg) and kainate (5 and 8 mg/kg) during adulthood. The occurrence of electrographic seizures (spike-and-wave discharges, SWD) and/or of behavioral seizures was monitored. There was no difference in latency to and duration of SWDs and seizures between lithium-saline and lithium-pilocarpine exposed rats. Thus, SE induced by lithium and pilocarpine early in life does not change the sensitivity to limbic seizures or seizures induced by GABA(A) antagonists during adulthood.
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