Video Experimental Relacionado
Updated: Jun 26, 2026
14:58
Methods for the Modulation and Analysis of NF-κB-dependent Adult Neurogenesis
Published on: February 14, 2014
Los antagonistas de la IAP inducen la autobiquitinación de las c-IAP, la activación de la NF-kappaB y la apoptosis
Eugene Varfolomeev1, John W Blankenship, Sarah M Wayson
1Department of Protein Engineering, Genentech, Inc., South San Francisco, CA 94080, USA.
Cell
|November 21, 2007
Resumen
Los antagonistas de pequeñas moléculas dirigidos a las proteínas del inhibidor de la apoptosis (IAP) inducen la muerte celular del cáncer al desencadenar la autoubiquitinación y la degradación de los c-IAP. Estos antagonistas de IAP también afectan la señalización del TNF y la regulación de la vía NF-kappaB.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
- Oncología Oncología Oncología.
Sus antecedentes:
- Las proteínas inhibidoras de la apoptosis (IAP) son reguladores cruciales de la muerte celular, a menudo sobreexpresadas en los cánceres.
- Los IAP presentan objetivos atractivos para nuevas estrategias terapéuticas contra el cáncer.
Objetivo del estudio:
- Investigar el mecanismo de acción de los antagonistas de IAP de pequeñas moléculas.
- Para aclarar el papel de las proteínas c-IAP en la muerte celular y las vías de señalización.
Principales métodos:
- Tratamiento de las células con antagonistas de IAP de pequeñas moléculas.
- Análisis de la ubiquitinación y degradación de las proteínas a través de vías proteasomales.
- Evaluación de la inducción de la muerte celular, la señalización del TNF y la actividad de la vía NF-kappaB.
Principales resultados:
- Los antagonistas de IAP de pequeñas moléculas inducen la autoubiquitinación y la degradación de los c-IAP.
- Los antagonistas de la IAP desencadenan la muerte celular dependiente del TNF y dependiente de la biosíntesis de proteínas.
- c-IAP1 y c-IAP2 regulan la señalización NF-kappaB promoviendo la degradación de NIK.
Conclusiones:
- Los antagonistas de IAP de molécula pequeña representan un enfoque terapéutico prometedor para el tratamiento del cáncer.
- Dirigirse a los IAP puede inducir la muerte de las células cancerosas y modular las vías de señalización críticas como NF-kappaB.
Más Videos Relacionados
Videos de Conceptos Relacionados
02:26NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
01:24Caspases
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 cells.
01:17The Extrinsic Apoptotic Pathway
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...
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...
01:22Cellular 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...