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Updated: May 13, 2026

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Optic Nerve Transection: A Model of Adult Neuron Apoptosis in the Central Nervous System
Published on: May 12, 2011
Apoptosis in neurodegenerative disorders.
1Laboratory of Neurosciences, National Institute on Aging, Gerontology Research Center, 5,600 Nathan Shock Drive, Baltimore, Maryland 21224, USA. mattsonm@grc.nia.nih.gov
Nature Reviews. Molecular Cell Biology
|March 20, 2001
Summary
Neuronal death, or apoptosis, drives neurodegenerative diseases like Alzheimer's. Understanding its mechanisms offers new therapeutic targets for these conditions.
Area of Science:
- Neuroscience
- Cell Biology
- Genetics
Background:
- Neuronal death is central to neurological disorders such as Alzheimer's, Parkinson's, and stroke.
- Apoptosis, a programmed cell death pathway, is implicated in these conditions.
- Key factors in apoptosis include oxidative stress, calcium imbalance, and caspase activation.
Purpose of the Study:
- To elucidate the shared mechanisms of neuronal death in neurodegenerative diseases.
- To identify survival pathways that counteract neuronal apoptosis.
- To explore novel therapeutic strategies based on understanding these pathways.
Main Methods:
- Review and synthesis of current research on neuronal apoptosis.
- Analysis of genetic and environmental factors contributing to neurodegeneration.
- Investigation of molecular pathways involved in cell survival and death.
Main Results:
- Evidence supports a common apoptotic pathway in various neurodegenerative diseases.
- Survival signals that counteract apoptosis involve managing oxidative stress and calcium homeostasis.
- Mitochondrial function plays a critical role in neuronal survival.
Conclusions:
- Targeting the mechanisms of neuronal apoptosis presents promising therapeutic avenues.
- Interventions aimed at promoting neuronal survival could treat neurodegenerative disorders.
- Further research into apoptosis regulation may yield effective treatments.
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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.
Phagocytosis of Apoptotic Cells
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Autophagic Cell Death
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