Video Experimental Relacionado
Updated: Jun 24, 2026

10:19
Neurodegeneration in an Animal Model of Chronic Amyloid-beta Oligomer Infusion Is Counteracted by Antibody Treatment Infused with Osmotic Pumps
Published on: August 14, 2016
9.6K
Efectos de la respiración a ritmo lento en el plasma Aβ y los espacios perivasculares cerebrales
medRxiv : the preprint server for health sciences
|January 16, 2026
Resumen
La respiración a ritmo lento redujo los niveles de amiloide-beta 42 (Aβ42) en adultos de 50 a 70 años. Esta intervención puede afectar el Alzheimer
Área de la Ciencia:
- Neurociencia
- Gerontología
- Investigación Cardiovascular
Sus antecedentes:
- El envejecimiento es el principal factor de riesgo de la enfermedad de Alzheimer (EA), relacionado con el desequilibrio autonómico y los niveles elevados de amiloide-beta (Aβ) en plasma.
- Investigaciones previas indicaron que la respiración a ritmo lento (SPB) puede reducir los niveles de Aβ e influir en la actividad autonómica.
Objetivo del estudio:
- Investigar los efectos a largo plazo de SPB en los niveles de Aβ en plasma en adultos de 50 a 70 años.
- Explorar el impacto de SPB en la estructura cerebral y la función cognitiva en este grupo de edad.
Principales métodos:
- Se aleatorizaron 62 adultos (50-70 años) a 10 semanas de SPB diario o a un control de respiración a ritmo aleatorio.
- Se evaluaron el Aβ42 en plasma, Aβ40, la proporción Aβ42/Aβ40, la estructura cerebral (espacios perivasculares, volúmenes del hipocampo) y la cognición.
- Los protocolos individualizados determinaron los ritmos de respiración para cada grupo.
Principales resultados:
- El grupo SPB demostró una reducción significativa en los niveles de Aβ42 en plasma en comparación con el grupo de control.
- No se encontraron diferencias significativas entre grupos para Aβ40 o las proporciones Aβ40/Aβ42.
- SPB no produjo efectos significativos en la estructura cerebral o el rendimiento cognitivo.
Conclusiones:
- Diez semanas de SPB redujeron eficazmente los niveles de Aβ42 en plasma en adultos de mediana edad y mayores.
- Se necesita más investigación para dilucidar los mecanismos y el potencial de SPB en la mitigación de la acumulación de Aβ.
- Las modificaciones en los métodos de intervención y control pueden haber influido en los hallazgos no significativos para los resultados secundarios.
Palabras clave:
respiración a ritmo lentoamiloide-betaespacios perivascularesneurocienciagerontologíainvestigación cardiovascularMás Videos Relacionados
Videos de Conceptos Relacionados
Factors Affecting Respiration
Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Alterations in Respiration II
There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Cerebrospinal Fluid
Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.
Cerebral Edema ll: Pathophysiology
Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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 microglia. Abnormal...

