Video Experimental Relacionado
Updated: Jul 28, 2026
08:47
Microdialysis of Excitatory Amino Acids During EEG Recordings in Freely Moving Rats
Published on: November 8, 2018
Concentración de aluminio en el cerebro en la diálisis encefalopatía
Lancet (London, England)
|April 29, 1978
Resumen
La encefalopatía por diálisis está relacionada con altos niveles de aluminio en el cerebro. El uso de agua del grifo sin tratar durante la diálisis aumenta significativamente la acumulación de aluminio, destacando su neurotoxicidad.
Área de la Ciencia:
- Nefrología Nefrología.
- La neurociencia es la neurociencia.
- Toxicología Toxicología.
Sus antecedentes:
- La encefalopatía por diálisis es un trastorno neurológico grave que se observa en pacientes con insuficiencia renal.
- Los niveles elevados de aluminio se han sospechado como un factor que contribuye a su patogénesis.
Objetivo del estudio:
- Para investigar la relación entre las concentraciones de aluminio en el cerebro y la encefalopatía por diálisis.
- Identificar las fuentes de aluminio que contribuyen a niveles cerebrales elevados en pacientes sometidos a diálisis.
Principales métodos:
- Medición de las concentraciones cerebrales de aluminio en pacientes con encefalopatía por diálisis, controles dializados y pacientes urémicos no dializados.
- Comparación de los niveles de aluminio en la materia gris y blanca.
- Correlación de los niveles de aluminio en el cerebro con la calidad del agua utilizada para la diálisis y la ingesta de aglutinantes de fosfato.
Principales resultados:
- Se encontraron concentraciones de aluminio cerebral significativamente más altas en pacientes con encefalopatía por diálisis en comparación con los controles.
- La materia gris mostró una mayor acumulación de aluminio que la materia blanca.
- El agua del grifo utilizada para la diálisis fue identificada como la principal fuente de aumento del aluminio en el cerebro.
Conclusiones:
- Los altos niveles de aluminio en el cerebro están fuertemente asociados con la encefalopatía por diálisis.
- El uso de agua del grifo sin tratar o suavizada en la diálisis es un importante contribuyente a la neurotoxicidad del aluminio.
- La acumulación de aluminio en el cerebro puede persistir incluso después del trasplante de riñón.
Videos de Conceptos Relacionados
01:26Alzheimer's Disease: Overview
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:19Encephalitis l: Introduction
Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
01:29Alzheimer Disease l: Introduction
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
01:23Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
01:22Dementia l: Introduction
Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
01:29Hepatic Encephalopathy
DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...