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- W1520659786 abstract "Focal cortical dysplasia (FCD) is known to be a major cause of intractable epilepsy. The cellular mechanism(s) underlying the epileptogenicity of FCD remain largely unknown. Because recent studies indicate that metabotropic glutamate receptor subtypes (mGluRs) play a role in epileptogenesis, we investigated the expression and cellular distribution pattern of mGluRs in FCD specimens.Immunocytochemical expression of group I and group II mGluR subtypes was investigated in 15 specimens of human FCD obtained during epilepsy surgery.Strong mGluR1alpha and mGluR5 (group I mGluRs) immunoreactivity (IR) was observed in the majority of FCD specimens in dysplastic as well as in heterotopic neurons. mGluR1alpha was expressed in a subpopulation of neurons (mainly large dysplastic cells), whereas mGluR5 was represented in a higher percentage of dysplastic neuronal cells. Group II mGluRs (mGluR2/3) IR was observed less frequently than that in group I mGluRs and generally appeared in <10% of the dysplastic neurons. IR for all three mGluR subtypes was observed in balloon cells. mGluR2/3 appeared to be most frequently expressed in glial fibrillary acidic protein (GFAP)-positive balloon cells (glial type), and mGluR1alpha, in microtubule-associated protein (MAP)2-positive cells (neuronal type). mGluR5 was present in the majority of balloon cells. Occasionally glial mGluR1alpha IR was observed in bizarre glial cells with di- or multinuclei. Reactive astrocytes were intensively stained, mainly with mGluR5 and mGluR2/3.The cellular distribution of mGluR subtypes, with high expression of mGluR1alpha and mGluR5 in dysplastic neurons, suggests a possible contribution of group I mGluRs to the intrinsic and high epileptogenicity of dysplastic cortical regions." @default.
- W1520659786 created "2016-06-24" @default.
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- W1520659786 date "2003-06-01" @default.
- W1520659786 modified "2023-10-15" @default.
- W1520659786 title "Expression and Cell Distribution of Group I and Group II Metabotropic Glutamate Receptor Subtypes in Taylor-type Focal Cortical Dysplasia" @default.
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- W1520659786 doi "https://doi.org/10.1046/j.1528-1157.2003.54802.x" @default.
- W1520659786 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12790891" @default.
- W1520659786 hasPublicationYear "2003" @default.
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