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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Postnatal caffeine treatment affects differently two pentylenetetrazol seizure models in rats.

Effects of repeated postnatal administration of caffeine (10 and 20mg/kg s.c. daily from P7 to P11) were studied in two models of epileptic seizures characterized by spike-and-wave EEG rhythm in 18- and 25-day-old rats. Rhythmic metrazol activity (RMA, model of human absences) was induced by low dose of pentylenetetrazol (PTZ, 20mg/kg or 40mg/kg, i.p.) and minimal clonic seizures (model of human myoclonic seizures) by two successive doses of PTZ (20 and 40mg/kg i.p.). Early postnatal caffeine treatment resulted in significant changes of RMA only in 18-day-old rats. Anticonvulsant effects were observed in RMA episodes elicited by the 20-mg/kg dose of PTZ in both caffeine groups whereas latency of RMA episodes induced by the 40-mg/kg dose was shortened and their duration was prolonged. No changes were found in 25-day-old animals. Incidence, EEG and motor pattern of minimal clonic seizures were not changed. Some animals in both control age groups exhibited transition to generalized tonic-clonic seizures. This type of seizures never appeared in caffeine-treated 25-day-old animals. Mixed effects of postnatal caffeine exposure were demonstrated; these predominantly anticonvulsant effects are age- and model-specific.[1]


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