Video Experimental Relacionado
Updated: Aug 4, 2026
08:16
Stereotaxic Infusion of Oligomeric Amyloid-beta into the Mouse Hippocampus
Published on: June 17, 2015
RAGE y la neurotoxicidad del péptido beta amiloide en la enfermedad de Alzheimer
1Department of Pathology, Columbia University, College of Physicians and Surgeons, New York 10032, USA.
Nature
|August 22, 1996
Resumen
El receptor de los productos finales de glicación avanzada (RAGE) media los efectos del péptido beta amiloide en la enfermedad de Alzheimer. El aumento de RAGE en el cerebro sugiere su papel en el daño neuronal.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología Molecular Biología Molecular
- Patología Patología Patología.
Sus antecedentes:
- El péptido amiloide-beta está implicado en la patogénesis de la enfermedad de Alzheimer (EA).
- La amiloide-beta induce neurotoxicidad a través del estrés oxidante y la activación microglial.
- Se ha planteado la hipótesis de un receptor específico de la superficie celular para el beta amiloide, pero no se ha identificado.
Objetivo del estudio:
- Para identificar el receptor de la superficie celular que media los efectos del péptido beta amiloide.
- Para investigar el papel de este receptor en la patología de la enfermedad de Alzheimer.
Principales métodos:
- Investigó la interacción entre el péptido beta amiloide y el receptor de los productos finales de glicación avanzada (RAGE).
- Se examinaron los efectos de la interacción amiloide-beta/RAGE en las células neuronales y microgliales.
- Evalúa los niveles de expresión de RAGE en el tejido cerebral de la enfermedad de Alzheimer.
Principales resultados:
- Proporcionó evidencia de que RAGE actúa como un receptor para el péptido beta amiloide.
- Se demostró que RAGE media los efectos neurotóxicos del beta amiloide en las neuronas y la microglia.
- Se observó un aumento de la expresión de RAGE en los cerebros de pacientes con enfermedad de Alzheimer.
Conclusiones:
- RAGE es un mediador clave de los efectos perjudiciales del péptido beta amiloide en la enfermedad de Alzheimer.
- La expresión elevada de RAGE en los cerebros de AD destaca su importancia en la disfunción neuronal y la muerte.
- Dirigirse a RAGE puede ofrecer una estrategia terapéutica para la enfermedad de Alzheimer.
Más Videos Relacionados
08:01Intracerebroventricular Injection of Amyloid-β Peptides in Normal Mice to Acutely Induce Alzheimer-like Cognitive Deficits
Published on: March 16, 2016
10:19Neurodegeneration in an Animal Model of Chronic Amyloid-beta Oligomer Infusion Is Counteracted by Antibody Treatment Infused with Osmotic Pumps
Published on: August 14, 2016
Videos de Conceptos Relacionados
03:03Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
03:03Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
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...
01:22Alzheimer's Disease: Treatment
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
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...