Video Experimental Relacionado
Updated: Feb 22, 2026
07:20
Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
Published on: January 31, 2025
1.3K
Principios fundamentales de los mecanismos de iniciación de la autofagia
Tetsuya Kotani1, Hitoshi Nakatogawa2,3
1Cell Biology Center, Institute of Integrated Research, Institute of Science Tokyo, Yokohama, Japan.
Nature structural & molecular biology
|February 20, 2026
Resumen
La autofagia, un proceso celular, degrada componentes no deseados a través de vías masivas o selectivas. Esta revisión detalla los mecanismos moleculares que controlan la iniciación de la autofagia para la homeostasis celular y el control de calidad.
Área de la Ciencia:
- Biología Celular; Biología Molecular; Bioquímica
Sus antecedentes:
- La autofagia es un proceso celular fundamental crucial para mantener la homeostasis.; Implica la degradación de componentes citoplasmáticos a través de lisosomas.; Se activan distintas vías autofágicas por diversas señales fisiológicas.
Objetivo del estudio:
- Revisar los avances recientes en la comprensión de la autofagia.; Elucidar los mecanismos moleculares subyacentes a la autofagia masiva y selectiva.; Explorar los principios compartidos que rigen la iniciación de la autofagia.
Principales métodos:
- Revisión bibliográfica de investigaciones recientes sobre autofagia.; Análisis de los mecanismos moleculares para el reconocimiento de carga y la biogénesis de membranas.; Discusión del ensamblaje de factores mediado por separación de fases.
Principales resultados:
- Mecanismos detallados para la degradación masiva durante la privación de nutrientes.; Perspectivas sobre la autofagia selectiva para eliminar componentes celulares específicos.; Identificación de principios compartidos como la separación de fases y la coordinación carga-membrana.
Conclusiones:
- La iniciación de la autofagia implica mecanismos diversos y específicos del contexto que convergen en principios fundamentales.; La comprensión de estos mecanismos es clave para la homeostasis celular y el control de calidad.; Los avances recientes revelan una coordinación intrincada entre el reconocimiento de carga y la biogénesis de membranas.
Videos de Conceptos Relacionados
01:27Autophagy
5.9K
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,...
5.9K
01:18Autophagic Cell Death
4.7K
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...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
4.7K
01:36Delivery Pathways to the Lysosome
10.3K
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...
10.3K
03:03mTOR Signaling and Cancer Progression
4.9K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.9K
01:31The Intrinsic Apoptotic Pathway
8.8K
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...
8.8K
01:22PI3K/mTOR/AKT Signaling Pathway
5.8K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.8K