Death Inducing Signaling Complex
Death Inducing Signaling Complex - Related Videos
07:17
Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
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Cited by 7 •
2021
Here, an experimental workflow is presented that enables the detection of caspase-8 processing directly at the death-inducing signaling complex (DISC) and determines the composition of this complex. This methodology has broad applications, from unraveling the molecular mechanisms of cell death pathways to the dynamic modeling of apoptosis networks.
03:50
An Ex Vivo Technique to Induce Neuronal Death via Oligodendrocyte-Specific CD8+ T Cells
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2025
This video demonstrates an ex vivo technique to induce brain cell death mediated through cytotoxic CD8+ T cells. Upon obtaining brain slices, activated oligodendrocyte-directed CD8+ T cells are transferred onto the slices to target the myelin sheath and oligodendrocytes. Post-incubation, the damage to myelin and neuronal death can be assessed histologically in the regions of interest.
02:06
Inducing Brain Death in a Mouse Model Using a Balloon Catheter
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2025
This video demonstrates the procedure for inducing brain death in a mouse model by increasing controlled intracranial pressure through a balloon catheter, mimicking natural brain death.
01:30
Assembly of Signaling Complexes
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2023
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions. Interaction domains in cell signaling Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
01:59
Modeling Reactive Oxygen Species-Induced Neuronal Death in Mouse Cerebellar Granule Neurons
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2025
This video outlines the generation of a neuronal injury model using reactive oxygen species (ROS) in mouse primary cerebellar granule neurons. It details the process of inducing oxidative stress by adding high concentrations of hydrogen peroxide. ROS exposure causes DNA strand breaks and genomic instability. Additionally, the oxidation of cellular proteins impairs their functions, while lipid peroxidation compromises membrane integrity. This cascade leads to cytochrome c release and caspase...
FAQs
The critical early event is clustering of cell-surface death receptors after an external ligand binds. This organization creates a concentrated signaling platform where adaptor proteins can associate through death-domain interactions. By bringing these components together, clustering enables assembly of the downstream complex and links an extracellular death signal to the intracellular machinery that initiates apoptosis.
FADD functions as an adaptor between activated death receptors and initiator procaspases. Its death-domain interactions connect the receptor-associated structure to the proteins needed for caspase activation. This position makes FADD a key molecular bridge: it does not provide the initiating signal, but helps convert receptor engagement into assembly of the signaling complex.
The assembled complex recruits procaspase-8 and procaspase-10, concentrating these inactive precursors at the signaling site. Their recruitment promotes activation, followed by cleavage of downstream substrates. Those cleavage events drive the cellular dismantling associated with apoptosis, so procaspase recruitment is the step that connects DISC assembly with execution of the death program.
DISC signaling begins with a death signal outside the cell, delivered when ligands such as Fas ligand or tumor necrosis factor engage cell-surface death receptors. This external initiation distinguishes the extrinsic apoptotic route from cell-death processes defined by different initiating signals. The receptor-centered mechanism therefore provides a way to study how extracellular cues control cell elimination.
Examining DISC formation helps researchers understand how tissues remove damaged or unwanted cells. The sequence from receptor engagement through adaptor recruitment, procaspase activation, and substrate cleavage reveals how a local external signal can produce controlled cellular dismantling. This information is relevant to understanding tissue maintenance and the biological consequences of regulated cell death.
The complex is relevant because regulated removal of cells affects both immune regulation and cancer biology. Its signaling provides a molecular context for examining how cells respond to death-inducing ligands and how unwanted cells are eliminated. Studying these events can therefore connect receptor-triggered apoptosis with broader questions about tissue control and abnormal cell persistence.
A conceptual analysis follows a defined sequence: ligand binding, death-receptor clustering, FADD recruitment through death-domain interactions, procaspase-8 and procaspase-10 assembly, initiator activation, and cleavage of downstream substrates. Tracking this order helps distinguish an initiating receptor event from later execution steps and clarifies where changes in the signaling pathway may affect apoptotic outcomes.
DISC research provides a framework for considering therapies that target apoptotic signaling because it identifies several linked stages between an external ligand and cell dismantling. Investigators can relate receptor engagement, adaptor assembly, initiator-caspase activation, and downstream substrate cleavage to therapeutic strategies. This pathway-level view helps connect molecular signaling events with efforts to influence cell survival or elimination.