Neuronal Apoptosis Analysis
Neuronal Apoptosis Analysis - Related Videos
12:06
Optic Nerve Transection: A Model of Adult Neuron Apoptosis in the Central Nervous System
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Cited by 40 •
2011
Optic Nerve transection is a widely used model of adult CNS injury. Ninety percent of retinal ganglion cells (RGCs) whose axons are completely transected (axotomy) die within 14 days after axotomy. This model is easily amenable to experimental manipulations and highly reproducible.
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.
07:42
Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c
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Cited by 15 •
2011
In this protocol, we describe the direct cytoplasmic microinjection of cytochrome c protein into fibroblasts and primary sympathetic neurons. This technique allows for the introduction of cytochrome c protein into the cytoplasm of cells and mimics the release of cytochrome c from mitochondria, which occurs during apoptosis.
01:30
Apoptosis
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2023
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 reduction of the tissue.
02:58
Immunoblot Analysis of Apoptosis Inhibition in Host Cells Expressing an Antiapoptotic Bacterial Protein
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2026
Source: Berens, C. et al. Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling. J. Vis. Exp. (2015)This video demonstrates the use of immunoblotting to assess apoptosis inhibition by the bacterial effector protein CaeB in human cells. It outlines the steps for detecting apoptotic markers following doxycycline-induced expression of pro-apoptotic proteins in host cells expressing the effector.
FAQs
Together, these indicators connect an intracellular organelle-level change with activation of cell-death machinery. Mitochondrial dysfunction signals an altered neuronal survival state, whereas caspase activation provides evidence that apoptosis-related molecular execution is occurring. Considering both helps researchers interpret neuronal loss more rigorously than relying on a single measurement, particularly when evaluating disease, injury, or possible neuroprotective effects.
DNA fragmentation and phosphatidylserine externalization provide complementary evidence because they reflect different observable changes in an affected neuron. DNA fragmentation indicates damage to genetic material, while phosphatidylserine externalization identifies a change at the cell surface. Including both measurements strengthens interpretation of apoptotic loss and can help separate it from less specifically characterized neuronal decline.
Distinction depends on using several apoptosis-associated indicators rather than treating any single change as conclusive. Mitochondrial dysfunction, caspase activation, DNA fragmentation, and phosphatidylserine externalization examine different aspects of the cellular response. When interpreted together, these measurements help determine whether observed neuronal loss is consistent with apoptosis instead of another form of cell loss.
Genetic and environmental factors can be evaluated by measuring how they alter apoptosis-associated neuronal changes. A comparison of these influences can reveal effects on mitochondrial function, caspase activity, DNA fragmentation, or phosphatidylserine externalization. This approach links a specific factor to neuron survival outcomes and helps identify mechanisms that may contribute to developmental abnormalities, disease, or neural damage.
A measurement panel should include mitochondrial dysfunction, caspase activation, DNA fragmentation, and phosphatidylserine externalization. These indicators span molecular and cellular changes rather than focusing on one signal alone. Reviewing the panel as a whole can help researchers characterize apoptotic change, compare experimental conditions, and judge whether an intervention is associated with improved neuronal survival.
Analysis can be structured by first identifying the experimental factor or treatment, then measuring the relevant apoptosis-associated changes and comparing the resulting neuronal survival patterns. Interpretation should connect each observed marker to the broader outcome rather than report markers in isolation. This workflow supports testing how genetic or environmental conditions, injury, or candidate neuroprotective treatments affect neurons.
Neuronal apoptosis analysis is useful across nervous system development, neurodegenerative disorders, developmental abnormalities, and neural injury. In each setting, the measurements can clarify whether altered neuronal survival is accompanied by molecular and cellular changes associated with apoptosis. The same framework also provides evidence for evaluating targeted interventions and understanding how damage or disease affects neural cells.