A genetic animal model of human neocortical heterotopia associated with seizures
| Autor: | Stuart S. Berr, John C. Goble, Frank Schottler, Leonard M. Eisenman, Anand Rao, Daniel E. Couture, Yasunobu Goto, Theodore Jackson, Ken Ichiro Hiramatsu, Jennifer L. Collins, Zong Fu Chen, Kevin S. Lee, Giuseppe Lanzino, Seung Chyul Hong, Heidi Scrable, Edward H. Bertram, Reed A. Omary, Hakan Caner, Haruaki Yamamoto |
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| Rok vydání: | 1997 |
| Předmět: |
Male
Electroencephalography Choristoma Rats Mutant Strains Epilepsy Prosencephalon Neural Pathways medicine Image Processing Computer-Assisted Animals Cerebral Cortex Neocortex medicine.diagnostic_test General Neuroscience Neurogenesis Articles medicine.disease Magnetic Resonance Imaging Rats Disease Models Animal medicine.anatomical_structure Neuronal migration disorder Heterotopia (medicine) Cerebral cortex Forebrain Female Psychology Neuroscience |
| Zdroj: | The Journal of neuroscience : the official journal of the Society for Neuroscience. 17(16) |
| ISSN: | 0270-6474 |
| Popis: | Malformations of the human neocortex are commonly associated with developmental delays, mental retardation, and epilepsy. This study describes a novel neurologically mutant rat exhibiting a forebrain anomaly resembling the human neuronal migration disorder of double cortex. This mutant displays a telencephalic internal structural heterotopia (tish) that is inherited in an autosomal recessive manner. The bilateral heterotopia is prominent below the frontal and parietal neocortices but is rarely observed in temporal neocortex. Neurons in the heterotopia exhibit neocortical-like morphologies and send typical projections to subcortical sites; however, characteristic lamination and radial orientation are disturbed in the heterotopia. The period of neurogenesis during which cells in the heterotopia are generated is the same as in the normotopic neocortex; however, the cells in the heterotopia exhibit a "rim-to-core" neurogenetic pattern rather than the characteristic "inside-out" pattern observed in normotopic neocortex. Similar to the human syndrome of double cortex, some of the animals with the tish phenotype exhibit spontaneous recurrent electrographic and behavioral seizures. The tish rat is a unique neurological mutant that shares several features with a human cortical malformation associated with epilepsy. On the basis of its regional connectivity, histological composition, and period of neurogenesis, the heterotopic region in the tish rat is neocortical in nature. This neurological mutant represents a novel model system for investigating mechanisms of aberrant neocortical development and is likely to provide insights into the cellular and molecular events contributing to seizure development in dysplastic neocortex. |
| Databáze: | OpenAIRE |
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