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Caspase-1, Caspase-4 and Caspase-5 in humans, and Caspase-1 and Caspase-11 in mice play important roles in inducing cell death by pyroptosis. This limits the life and proliferation time of intracellular and extracellular pathogens.
For many years, neither "apoptosis" nor "programmed cell death" was a highly cited term. Two discoveries brought cell death from obscurity to a major field of research: identification of the first component of the cell death control and effector mechanisms, and linkage of abnormalities in cell death to human disease, in particular cancer.
Overview of signal transduction pathways involved in apoptosis. Cell death is the event of a biological cell ceasing to carry out its functions. This may be the result of the natural process of old cells dying and being replaced by new ones, as in programmed cell death, or may result from factors such as diseases, localized injury, or the death of the organism of which the cells are part.
Degradation of nuclear DNA into nucleosomal units is one of the hallmarks of apoptotic cell death. It occurs in response to various apoptotic stimuli in a wide variety of cell types. Molecular characterization of this process identified a specific DNase (CAD, caspase-activated DNase) that cleaves chromosomal DNA in a caspase-dependent manner.
The death-inducing signaling complex (DISC) is a multi-protein complex formed by members of the death receptor family of apoptosis-inducing cellular receptors. [1] A typical example is FasR, which forms the DISC upon trimerization as a result of its ligand binding. The DISC is composed of the death receptor, FADD, and caspase 8. It transduces a ...
Caspase-2 is an important enzyme in the cysteine aspartate protease family, known as caspases, which are central to the regulation of apoptosis and, in certain cases, inflammation. While many caspases are mainly involved in the initiation and execution of cell death, caspase-2 has a broader range of functions.
Caspase-10 is an enzyme that, in humans, is encoded by the CASP10 gene. [3] This gene encodes a protein that is a member of the cysteine-aspartic acid protease family. Sequential activation of caspases plays a central role in the execution-phase of cell apoptosis.
The second is that cleavage takes place while caspase 9 is still in its monomeric form. [13] [16] In each case, caspase 9 activation leads to the activation of a full caspase cascade and subsequent cell death. It has been suggested that the evolutionary reason for the multimeric protein complex activating the caspase cascade is to ensure trace ...