Related Experiment Video
Updated: Jun 15, 2026
10:29
Morphological and Functional Evaluation of Axons and their Synapses during Axon Death in Drosophila melanogaster
Published on: March 16, 2020
Sertad1 plays an essential role in developmental and pathological neuron death
Subhas C Biswas1, Yi Zhang, Grace Iyirhiaro
1Department of Pathology and Cell Biology and Taub Center for Alzheimer's Disease Research, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.
Summary
Sertad1 activates cell cycle proteins essential for neuron death. Downregulating Sertad1 protects neurons in models of DNA damage, Alzheimer's disease, and developmental cell death, suggesting it as a therapeutic target.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Neuronal death involves cell cycle proteins, but regulation remains unclear.
- The in vivo relevance of this pathway is not well understood.
- Identifying key regulators is crucial for understanding neurodegeneration and development.
Purpose of the Study:
- To identify novel regulators of neuronal cell death pathways.
- To investigate the role of Sertad1 in neuronal apoptosis and developmental death.
- To assess Sertad1 as a potential therapeutic target for neurological disorders.
Main Methods:
- Differential screening of neuron cultures subjected to DNA damage.
- RNA interference (RNAi) to downregulate Sertad1 expression.
- Neuronal survival assays under various death-inducing conditions (NGF deprivation, Abeta exposure, DNA damage).
- In vivo studies of developmental neuronal death in the cerebral cortex.
Main Results:
- Sertad1, a Cdk4 activator, was identified as a key transcript induced by DNA damage in neurons.
- Sertad1 is upregulated in neurons upon nerve growth factor (NGF) deprivation and beta-amyloid (Abeta) exposure.
- RNAi-mediated knockdown of Sertad1 significantly protected neurons in all tested death models.
- Sertad1 is required for the initiation of the apoptotic cell cycle pathway during NGF withdrawal.
- Sertad1 expression is essential for normal developmental neuronal death in the cerebral cortex.
Conclusions:
- Sertad1 is a critical mediator of neuronal death in response to trophic support deprivation, DNA damage, and Abeta exposure.
- Sertad1 plays an essential role in both pathological and developmental neuronal cell death in vitro and in vivo.
- Sertad1 represents a promising therapeutic target for conditions involving excessive or aberrant neuronal loss, such as Alzheimer's disease.
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