Video Experimental Relacionado
Updated: Sep 9, 2025

10:25
Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes
Published on: September 27, 2024
715
Los órganos procesadores promueven el control de la calidad lisosómica y la supervivencia celular durante la
bioRxiv : the preprint server for biology
|September 5, 2025
Resumen
Los lisosomas se recuperan del daño formando cuerpos de procesamiento (PB), que son cruciales para la supervivencia celular. Estos PB trabajan con gránulos de estrés para reparar el daño celular y mantener la homeostasis.
Área de la Ciencia:
- Biología celular
- Biología molecular
- La bioquímica
Sus antecedentes:
- Los lisosomas son órganos vitales susceptibles al estrés.
- El mantenimiento de la homeostasis celular requiere una respuesta y recuperación efectivas del daño lisosomal.
- Los mecanismos de recuperación lisosómica son menos conocidos que las respuestas de daño agudo.
Objetivo del estudio:
- Identificar las diferencias moleculares entre la respuesta al daño lisosomal agudo y las fases de recuperación.
- Investigar el papel de los organismos de procesamiento en la recuperación lisosómica.
- Para aclarar la función de los PB en la supervivencia celular después de la lesión lisosómica.
Principales métodos:
- Se ha investigado la regulación traslacional durante el estrés lisosomal.
- Cuerpos de procesamiento identificados como nuevas estructuras formadas durante la recuperación lisosómica.
- Se examinó la interacción entre los PB y los gránulos de tensión (SG).
- Se evaluó el papel de los PB en el control de la calidad lisosómica y la supervivencia celular.
Principales resultados:
- La recuperación lisosómica desencadena la formación de un cuerpo de procesamiento (PB), distinto de la formación de gránulos de estrés agudo (SG).
- Los PB son esenciales para el control de la calidad lisosómica y la supervivencia celular durante la recuperación.
- Los PB colaboran con los SG para estabilizar las membranas lisosomales dañadas.
- Los PB reclutan las catepsinas liberadas, contribuyendo a la supervivencia celular.
Conclusiones:
- Los cuerpos procesadores (CP) son los efectores clave del programa de recuperación lisosómica.
- Los condensados biomoleculares como PB y SG juegan un papel crítico en la respuesta celular al daño lisosomal.
- Los hallazgos ponen de relieve la relevancia más amplia de los PB en los procesos de daño celular y enfermedad.
Videos de Conceptos Relacionados
Lysosomes
19.9K
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
19.9K
Delivery Pathways to the Lysosome
6.9K
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
6.9K
Lysosomal Hydrolases
3.9K
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,...
3.9K
Autophagy
4.6K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
4.6K
Phagocytosis of Apoptotic Cells
4.0K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized...
Normal cells contain receptors that prevent them from being recognized...
4.0K
The Proteasome
1.1K
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
1.1K

