Video Experimental Relacionado
Updated: Aug 7, 2026
10:39
Purification of Mitochondria from Yeast Cells
Published on: August 24, 2009
Las mitocondrias y la apoptosis
1La Jolla Institute for Allergy and Immunology, 10355 Science Center Drive, San Diego, CA 92121, USA.
Science (New York, N.Y.)
|August 28, 1998
Resumen
Las mitocondrias juegan un papel central en la apoptosis, regulando la muerte celular a través de eventos como la liberación de caspasas y cambios potenciales. Comprender estas vías mitocondriales es clave para descifrar los mecanismos fisiológicos de muerte celular.
Área de la Ciencia:
- Biología celular Biología celular.
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La apoptosis, o muerte celular programada, es crucial para el desarrollo y la homeostasis tisular.
- Las mitocondrias son los reguladores centrales de la vía de la apoptosis intrínseca.
- Los eventos mitocondriales clave incluyen la liberación del citocromo c y la pérdida del potencial de la membrana mitocondrial.
Objetivo del estudio:
- Para dilucidar las funciones multifacéticas de las mitocondrias en el inicio y la regulación de la apoptosis.
- Para detallar las vías de señalización que convergen en las mitocondrias durante la muerte celular programada.
Principales métodos:
- Análisis de los eventos mitocondriales durante la apoptosis.
- Investigación de la participación de la proteína de la familia Bcl-2 pro y antiapoptótica.
- Examen de las vías de señalización que influyen en la función mitocondrial en la muerte celular.
Principales resultados:
- Las mitocondrias orquestan eventos críticos de apoptosis, incluida la liberación del activador de la caspasa y la bioenergética alterada.
- La disipación del potencial de transmembrana mitocondrial es un indicador clave de la apoptosis.
- Las proteínas de la familia Bcl-2 modulan las vías de la apoptosis mitocondrial.
Conclusiones:
- Las mitocondrias son fundamentales en la ejecución de la muerte celular fisiológica.
- Cascadas de señalización distintas convergen en las mitocondrias para controlar la apoptosis.
- Comprender las funciones mitocondriales en la apoptosis es vital para las estrategias terapéuticas.
Videos de Conceptos Relacionados
01:37Mitochondria
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
01:30Apoptosis
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
01:31The Intrinsic Apoptotic Pathway
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
01:18Autophagic Cell Death
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
01:37Mitochondria
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
01:22Cellular Injury V: Apoptosis and Autophagy
Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...