Video Experimental Relacionado
Updated: May 7, 2026

11:18
Automated Separation of C. elegans Variably Colonized by a Bacterial Pathogen
Published on: March 21, 2014
8.0K
La proteína adaptadora candidata CED-6 promueve el envolvimiento de las células apoptóticas en C. elegans
1Cold Spring Harbor Laboratory, New York 11724, USA.
Cell
|July 11, 1998
Resumen
Los científicos identificaron el gen ced-6, crucial para envolver las células durante la muerte celular programada (apoptosis) en C. elegans. Este descubrimiento arroja luz sobre los mecanismos moleculares del aclaramiento celular.
Área de la Ciencia:
- Biología celular Biología celular.
- Biología del desarrollo Biología del desarrollo.
- Genética La genética.
Sus antecedentes:
- El envolvimiento celular, o fagocitosis, de las células apoptóticas es vital para la homeostasis tisular.
- Los mecanismos moleculares que regulan este proceso fundamental aún no se comprenden por completo.
Objetivo del estudio:
- Identificar y caracterizar los genes involucrados en el engulfment de las células apoptóticas en C. elegans.
- Para aclarar la función del nuevo gen ced-6 en este proceso.
Principales métodos:
- Clonado y caracterización funcional del gen ced-6.
- Análisis del mosaico genético en C. elegans.
- Análisis de los dominios de la proteína CED-6.
Principales resultados:
- El gen ced-6 fue clonado y se encontró que es esencial para la envoltura celular apoptótica en C. elegans.
- La proteína CED-6 posee un dominio de unión a la fosfotirosina y una región rica en prolina/serina.
- El análisis del mosaico genético indicó que ced-6 funciona dentro de la célula envolvente.
- ced-6 promueve la envoltura de las células en las etapas apoptóticas temprana y tardía.
Conclusiones:
- CED-6 actúa como una molécula adaptadora en una vía de transducción de señales.
- Esta vía media específicamente el reconocimiento y la envoltura de las células apoptóticas.
- Los hallazgos proporcionan información crítica sobre la base molecular del aclaramiento de la muerte celular programada.
Videos de Conceptos Relacionados
Cancer Cell Migration through Invadopodia
2.5K
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
2.5K
Apoptosis
12.3K
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...
12.3K
Caspases
8.7K
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
8.7K
The Extrinsic Apoptotic Pathway
6.2K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
6.2K
The Intrinsic Apoptotic Pathway
6.2K
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...
6.2K
Phagocytosis of Apoptotic Cells
3.9K
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...
3.9K

