Video Experimental Relacionado

Updated: Apr 30, 2026

Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices

Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices

Published on: July 15, 2010

La ubiquitina hidrolasa Uch-L1 rescata las disminuciones inducidas por beta-amiloide en la función sináptica y la

Bing Gong¹, Zixuan Cao, Ping Zheng

¹Department of Pathology and Taub Institute, Columbia University, New York, NY 10032, USA.

|August 23, 2006

Resumen

La ubiquitina C-terminal hidrolasa L1 (Uch-L1) es crucial para la función cognitiva y la salud sináptica. Restauración de la actividad de Uch-L1 en el Alzheimer.

Área de la Ciencia:

La neurociencia es la neurociencia.
Biología Molecular Biología Molecular
Enfermedades neurodegenerativas Las enfermedades neurodegenerativas.

Sus antecedentes:

El sistema neuronal ubiquitina/proteasomal está implicado en la patogénesis de la enfermedad de Alzheimer (EA).
La ubiquitina C-terminal hidrolasa L1 (Uch-L1) juega un papel vital en el mantenimiento de las funciones sinápticas y cognitivas.

Objetivo del estudio:

Investigar el papel de Uch-L1 en la función sináptica y cognitiva.
Evaluar el potencial terapéutico de la transducción de la proteína Uch-L1 en un modelo de enfermedad de Alzheimer.

Principales métodos:

Se utilizaron rebanadas del hipocampo tratadas con amiloide-beta oligomérico (Abeta).
Empleó el modelo de ratón transgénico APP/PS1 de la enfermedad de Alzheimer.
La proteína Uch-L1 administrada se fusionó con el dominio de transducción de la proteína transactivadora del VIH (TAT).

Principales resultados:

La transducción de la proteína de fusión Uch-L1-TAT restauró la actividad enzimática y la función sináptica en rodajas tratadas con Abeta.
Las inyecciones intraperitoneas de Uch-L1-TAT mejoraron la retención del aprendizaje contextual en ratones APP/PS1.
Efectos beneficiosos correlacionados con la restablecida subunidad IIalpha reguladora de PKA, la actividad de PKA y la fosforilación de CREB.

Conclusiones:

Uch-L1 es esencial para la función sináptica y cognitiva normal.
La transducción de la proteína Uch-L1 representa una estrategia terapéutica prometedora para la enfermedad de Alzheimer.
El mecanismo implica la restauración de las vías de señalización clave, incluidas PKA y CREB.

Más Videos Relacionados

Stereotaxic Infusion of Oligomeric Amyloid-beta into the Mouse Hippocampus

Stereotaxic Infusion of Oligomeric Amyloid-beta into the Mouse Hippocampus

Published on: June 17, 2015

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain

Quantifying Subcellular Ubiquitin-proteasome Activity in the Rodent Brain

Published on: May 21, 2019

Videos de Conceptos Relacionados

Lysosomal Hydrolases

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...

The Unfolded Protein Response

The Unfolded Protein Response

The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...

Export of Misfolded Proteins out of the ER

Export of Misfolded Proteins out of the ER

After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...

Alzheimer Disease ll: Pathophysiology

Alzheimer 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...

Dementia l: Introduction

Dementia 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...