Video Experimental Relacionado
Updated: Jul 6, 2026
07:35
Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
Published on: June 1, 2022
Disfunción múltiple de la cadena respiratoria sensible a la quinona debido a la deficiencia generalizada de la
A Rötig1, E L Appelkvist, V Geromel
1Unité de Recherches sur les Handicaps Génétiques de l'Enfant, INSERM U393, Hôpital des Enfants-Malades, Paris, France.
Lancet (London, England)
|September 6, 2000
Resumen
La deficiencia de la coenzima Q10, una rara enfermedad mitocondrial, causa graves problemas neurológicos y renales. El diagnóstico temprano y el tratamiento con ubidecarenona oral (coenzima Q10) mejoran significativamente los resultados de los pacientes.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- La medicina mitocondrial es la medicina de las mitocondrias.
- Genética La genética.
Sus antecedentes:
- Las deficiencias de la cadena respiratoria son un grupo diverso de trastornos metabólicos hereditarios graves, a menudo intratables.
- La deficiencia de la coenzima Q10 (ubiquinona) es una subclase específica que requiere un diagnóstico oportuno y preciso para un manejo efectivo.
Objetivo del estudio:
- Para investigar la función de la cadena respiratoria en hermanos que presentan encefalomiopatía severa y insuficiencia renal.
- Para diagnosticar y caracterizar la deficiencia de la coenzima Q10 como una posible causa subyacente.
- Para evaluar la eficacia terapéutica de la ubidecarenona oral en individuos afectados.
Principales métodos:
- Actividades evaluadas de enzimas de la cadena respiratoria en biopsias musculares, linfocitos y fibroblastos.
- Cuantificación de los niveles de la coenzima Q10 celular utilizando cromatografía líquida de alto rendimiento y marcado radiológico.
- Monitoreo del estado clínico y los parámetros bioquímicos durante 3 años de terapia oral con quinona.
Principales resultados:
- Deficiencia confirmada de las enzimas de la cadena respiratoria dependientes de la coenzima Q10 en múltiples tipos de tejidos.
- Se demostraron niveles indetectables de coenzima Q10, lo que apoya una deficiencia generalizada.
- Se observó una mejora significativa en la condición del paciente y las actividades enzimáticas con el tratamiento oral con ubidecarenona.
Conclusiones:
- La deficiencia de enzimas de la cadena respiratoria sensibles a múltiples quinonas es un trastorno tratable.
- La administración oral de ubidecarenona ofrece una estrategia terapéutica exitosa.
- Destaca la importancia de considerar y diagnosticar la deficiencia de la coenzima Q10 en las presentaciones clínicas relevantes.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:30The Electron Transport Chain
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q in...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q in...
01:41The Supercomplexes in the Crista Membrane
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
01:43Electron Transport Chain: Complex III and IV
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
01:20Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
01:23Chronic Obstructive Pulmonary Disease II: Emphysema
Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
01:24Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features
Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...