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2.
Neuropsychobiology ; 66(1): 57-62, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22797278

RESUMEN

BACKGROUND: Reelin is under epigenetic control and has been reported to be decreased in cortical regions in schizophrenia. METHODS: To establish if expression of reelin is altered in specific cortical, hippocampal or thalamic regions of schizophrenia patients, we measured gene expression of reelin in a postmortem study of elderly patients with schizophrenia and non-affected controls in both hemispheres differentiating between gray and white matter. We compared cerebral postmortem samples (dorsolateral prefrontal cortex BA9 and BA46, superior temporal cortex BA22, entorhinal cortex BA28, sensoric cortex BA1-3, hippocampus, CA4, mediodorsal nucleus of the thalamus) from 12 schizophrenia patients with 13 normal subjects investigating gene expression of reelin in the gray and white matter of both hemispheres by in situ-hybridization. RESULTS: The left prefrontal area (BA9) of schizophrenia patients revealed a decreased expression of reelin-mRNA of 29.1% in the white (p = 0.022) and 13.6% in the gray matter (p = 0.007) compared to the control group. None of the other regions examined showed any statistically significant differences. CONCLUSION: Since reelin is responsible for migration and synapse formation, the decreased gene expression of reelin in the left prefrontal area of schizophrenia patients points to neurodevelopmental deficits in neuronal migration and synaptic plasticity. However, our study group was small, and results should be verified using larger samples.


Asunto(s)
Moléculas de Adhesión Celular Neuronal/metabolismo , Proteínas de la Matriz Extracelular/metabolismo , Proteínas del Tejido Nervioso/metabolismo , Corteza Prefrontal/metabolismo , ARN Mensajero/análisis , Esquizofrenia/metabolismo , Serina Endopeptidasas/metabolismo , Anciano , Anciano de 80 o más Años , Estudios de Casos y Controles , Moléculas de Adhesión Celular Neuronal/genética , Movimiento Celular/genética , Movimiento Celular/fisiología , Corteza Cerebral/metabolismo , Proteínas de la Matriz Extracelular/genética , Femenino , Expresión Génica , Perfilación de la Expresión Génica , Hipocampo/metabolismo , Humanos , Hibridación in Situ , Masculino , Núcleo Talámico Mediodorsal/metabolismo , Persona de Mediana Edad , Proteínas del Tejido Nervioso/genética , Plasticidad Neuronal , Neuronas/metabolismo , Proteína Reelina , Esquizofrenia/genética , Serina Endopeptidasas/genética , Sinapsis/genética , Sinapsis/metabolismo , Tálamo/metabolismo
4.
J Neural Transm (Vienna) ; 116(12): 1657-65, 2009 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-19823762

RESUMEN

An important risk gene in schizophrenia is D-: amino acid oxidase (DAAO). To establish if expression of DAAO is altered in cortical, hippocampal or thalamic regions of schizophrenia patients, we measured gene expression of DAAO in a post-mortem study of elderly patients with schizophrenia and non-affected controls in both hemispheres differentiating between gray and white matter. We compared cerebral post-mortem samples (granular frontal cortex BA9, middle frontal cortex BA46, superior temporal cortex BA22, entorhinal cortex BA28, sensoric cortex BA1-3, hippocampus (CA4), mediodorsal nucleus of the thalamus) from 10 schizophrenia patients to 13 normal subjects investigating gene expression of DAAO in the gray and white matter of both hemispheres of the above-mentioned brain regions by in situ-hybridization. We found increased expression of DAAO-mRNA in the hippocampal CA4 of schizophrenic patients. Compared to the control group, both hemispheres of the hippocampus of schizophrenic patients showed an increased expression of 46% (right, P = 0.013) and 54% (left, P = 0.019), respectively. None of the other regions examined showed statistically significant differences in DAAO expression. This post-mortem study demonstrated increased gene expression of DAAO in the left and right hippocampus of schizophrenia patients. This increased expression could be responsible for a decrease in local D-: serine levels leading to a NMDA-receptor hypofunction that is hypothesized to play a major role in the pathophysiology of schizophrenia. However, our study group was small and results should be verified using larger samples.


Asunto(s)
D-Aminoácido Oxidasa/metabolismo , Giro Dentado/enzimología , Esquizofrenia/enzimología , Anciano , Corteza Cerebral/enzimología , Corteza Cerebral/metabolismo , D-Aminoácido Oxidasa/genética , Giro Dentado/metabolismo , Femenino , Lateralidad Funcional , Expresión Génica , Humanos , Hibridación in Situ , Masculino , Fibras Nerviosas Mielínicas/enzimología , Fibras Nerviosas Mielínicas/metabolismo , Fibras Nerviosas Amielínicas/enzimología , Fibras Nerviosas Amielínicas/metabolismo , ARN Mensajero/metabolismo , Esquizofrenia/genética , Esquizofrenia/metabolismo , Tálamo/enzimología , Tálamo/metabolismo
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