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Transplacentally induced neuronal migration disorders: An animal model for the study of the epilepsies by Isabelle M. Germano; Ellen F. Sperber is a Neuroscience article available to read on EtoBox.

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Recent clinical and laboratory data suggest that there is a link between neuronal migration disorders (NMD) and increased seizure threshold. To characterize an animal model with features similar to human NMD and to assess seizure susceptibility, NMD were induced in the rat at the time of neuroblastic division (PG15) and three other gestational ages (PG 13, PG14, PG16) by transplacental exposure to methylaxozymethanol (MAM, 25 mg/kg). Offspring pups were monitored for spontaneous and electrographic seizures. At postnatal day 14, randomly selected rat pups were sacrificed for histological examination. In other MAM-exposed pups and controls, status epilepticus was induced by intraperitoneal administration of kainic acid. On histology, NMD were found in all PG 15 MAM-exposed rats, in comparison to 63% of PG 13, 70% of PG 14, 80% of PG16. Histological features included cortical laminar disorganization, ectopic neurons in the subcortical white matter and in cortical layer I, persistent granular layer, marginal glioneuronal heterotopia, and discrete areas of neuronal ectopia in the CA1 subfield of the hippocampus. Based on the severity of the neuronal migration abnormalities, rats were di

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Author

Isabelle M. Germano; Ellen F. Sperber

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0360-4012)

Published

1998

Language

EN

Field

Neuroscience (Life Sciences)