Widespread pH abnormalities in patients with malformations of cortical development and epilepsy: A phosphorus-31 brain MR spectroscopy study
| Autor: | Mauricio Ricardo Moreira da Silva Filho, Celi Santos Andrade, Miriam Harumi Tsunemi, Alexandre Fligelman Kanas, Eun Joo Park, Maria Concepcion Garcia Otaduy, Claudia da Costa Leite, Kette D. Valente |
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| Rok vydání: | 2014 |
| Předmět: |
Adult
Male In vivo magnetic resonance spectroscopy Pathology medicine.medical_specialty Magnetic Resonance Spectroscopy Phosphocreatine Young Adult Epilepsy Imaging Three-Dimensional Developmental Neuroscience Centrum semiovale medicine Polymicrogyria Humans Analysis of Variance medicine.diagnostic_test business.industry Brain Phosphorus Magnetic resonance imaging General Medicine Hydrogen-Ion Concentration Middle Aged Cortical dysplasia medicine.disease Malformations of Cortical Development Nap Schizencephaly Case-Control Studies Pediatrics Perinatology and Child Health Female Neurology (clinical) business |
| Zdroj: | Brain and Development. 36:899-906 |
| ISSN: | 0387-7604 |
| Popis: | Neuroimaging studies demonstrate that not only the lesions of malformations of cortical development (MCD) but also the normal-appearing parenchyma (NAP) present metabolic impairments, as revealed with (1)H-MRS. We have previously detected biochemical disturbances in MCD lesions with phosphorus-31 magnetic resonance spectroscopy (31P-MRS). Our hypothesis is that pH abnormalities extend beyond the visible lesions.Three-dimensional 31P-MRS at 3.0 T was performed in 37 patients with epilepsy and MCD, and in 31 matched-control subjects. The patients were assigned into three main MCD subgroups: cortical dysplasia (n=10); heterotopia (n=14); schizencephaly/polymicrogyria (n=13). Voxels (12.5 cm3) were selected in five homologous regions containing NAP: right putamen; left putamen; frontoparietal parasagittal cortex; right centrum semiovale; and left centrum semiovale. Robust methods of quantification were applied, and the intracellular pH was calculated with the chemical shifts of inorganic phosphate (Pi) relative to phosphocreatine (PCr).In comparison to controls and considering a Bonferroni adjusted p-value0.01, MCD patients presented significant reduction in intracellular pH in the frontoparietal parasagittal cortex (6.985±0.022), right centrum semiovale (7.004±0.029), and left centrum semiovale (6.995±0.030), compared to controls (mean values±standard deviations of 7.087±0.048, 7.096±0.042, 7.088±0.045, respectively). Dunnet and Dunn tests demonstrated that the differences in pH values remained statistically significant in all MCD subgroups. No significant differences were found for the putamina.The present study demonstrates widespread acidosis in the NAP, and reinforces the idea that MCD visible lesions are only the tip of the iceberg. |
| Databáze: | OpenAIRE |
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