Caspase 3 Cleavage
Caspase 3 Cleavage - Related Videos
03:34
Assessing Caspase-Mediated Cleavage of Viral and Host Proteins in Virus-Infected Cells
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2025
The video demonstrates a method to assess caspase-mediated protein cleavage in virus-infected cells. Post-viral infection, caspases get activated and degrade various host cellular proteins and viral nucleoproteins while specific caspase inhibitors prevent this degradation, as confirmed by western blotting.
02:54
Caspase-3/7 Assay: A Luminescence-Based Assay to Quantify Apoptosis by Measuring Caspase-3/7 Activities in Frog Skin Explants
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2025
This video describes an in vitro Caspase-3/7 luminescent assay to quantify cell death or apoptosis. The assay measures luminescence produced following caspase-3/7 cleavage of a pro-luminescent DEVD substrate. The luminescence generated is proportional to caspase-3/7 activity.
08:41
Caspase-3 Activity in the Rat Amygdala Measured by Spectrofluorometry After Myocardial Infarction
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Cited by 20 •
2016
Myocardial infarction (MI) is not only followed by impaired cardiac function but also by apoptosis in the amygdala, a brain region involved in the behavioral consequences of MI. This protocol describes how to induce MI, collect amygdala tissue and measure caspase-3 activity, a marker of apoptosis, therein.
08:20
Analysis of Apoptosis in Zebrafish Embryos by Whole-mount Immunofluorescence to Detect Activated Caspase 3
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Cited by 84 •
2013
Certain genetic perturbations or exposure to toxins can disrupt normal developmental processes leading to death of specific cell types. The analysis of activated Caspase 3 by whole-mount immunofluorescence in zebrafish embryos reveals stage- and tissue-specific localization of cells specifically undergoing apoptosis.
04:01
Assessment of the Activation of Multiple Caspases in Macrophages
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2025
This video demonstrates the assessment of multiple caspase activations in bone marrow-derived macrophages through stimulation with the influenza virus. Following macrophage lysis, heat-inactivation of lysate, and centrifugation, intracellular caspases are collected for subsequent immunological analysis.
FAQs
Activation depends on proteolytic processing of procaspase-3 by initiator caspases. This cleavage converts the inactive precursor into active subunits, allowing the enzyme to act on cellular proteins. The sequence places caspase-3 downstream of initiating apoptotic signals and makes its cleavage a molecular transition from an inactive precursor to execution-stage proteolysis.
Once activated, caspase-3 recognizes protein substrates that contain particular aspartate residues. Cleavage at these sites disrupts proteins needed for cellular structure and function, helping produce DNA fragmentation, cytoskeletal breakdown, and shrinkage. Thus, substrate sequence and accessibility influence which cellular components are dismantled during apoptosis within the cell.
Initiator caspases and caspase-3 have different positions in the cleavage sequence. Initiator enzymes process procaspase-3, whereas the activated enzyme cleaves downstream cellular substrates. This division of labor separates pathway initiation from broad cellular dismantling, helping researchers interpret cleaved caspase-3 as evidence of execution-stage apoptotic activity rather than simply an upstream signal.
The most informative assay depends on the research question. Immunoblotting can assess the presence of cleaved caspase-3, immunostaining can identify cells displaying the cleaved enzyme, and activity assays can evaluate caspase-related enzymatic activity. These approaches provide distinct readouts, so the method should match whether the study emphasizes detection, cellular identification, or activity.
In disease research, toxicology, and anticancer-treatment studies, cleaved caspase-3 measurements provide a way to evaluate whether experimental conditions engage apoptotic cell death. The same readout can support comparisons among treatments or biological states, while interpretation remains tied to the assay used, including protein detection, cellular staining, or activity measurement.
Developmental biology can use cleaved caspase-3 detection to examine regulated cell death during development. Because activation is linked to downstream protein cleavage and characteristic cellular changes, staining or other measurements can connect apoptotic execution with observed cell loss. This makes the marker useful for relating molecular events to developmental patterns.