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Updated: Jul 30, 2026
Isolation and Culture of Hippocampal Neurons from Prenatal Mice
Published on: July 26, 2012
Attenuation of neurotoxicity in cortical cultures and hippocampal slices from E2F1 knockout mice
T F Gendron1, G A Mealing, J Paris
1Institute for Biological Sciences, National Research Council Canada, Ottawa, Ontario, Canada. tania.gendron@nrc.ca
Abstract:
The E2F1 transcription factor modulates neuronal apoptosis induced by staurosporine, DNA damage and beta-amyloid. We demonstrate E2F1 involvement in neuronal death induced by the more physiological oxygen-glucose deprivation (OGD) in mouse cortical cultures and by anoxia in mouse hippocampal slices. E2F1(+/+) and (-/-) cultures were comparable, in that they contained similar neuronal densities, responded with similar increases in intracellular calcium concentration ([Ca(2+)]i) to glutamate receptor agonists, and showed similar NMDA receptor subunit mRNA expression levels for NR1, NR2A and NR2B. Despite these similarities, E2F1(-/-) cultures were significantly less susceptible to neuronal death than E2F1(+/+) cultures 24 and 48 h following 120-180 min of OGD. Furthermore, the absence of E2F1 significantly improved the ability of CA1 neurons in hippocampal slices to recover synaptic transmission following a transient anoxic insult in vitro. These results, along with our finding that E2F1 mRNA levels are significantly increased following OGD, support a role for E2F1 in the modulation of OGD- and anoxia-induced neuronal death. These findings are consistent with studies showing that overexpression of E2F1 in postmitotic neurons causes neuronal degeneration and the absence of E2F1 decreases infarct volume following cerebral ischemia.
Insights
The transcription factor E2F1 promotes neuronal death following oxygen-glucose deprivation (OGD) and anoxia. Its absence protects neurons and improves synaptic recovery after these insults.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Death Research
Background:
- The transcription factor E2F1 is implicated in neuronal apoptosis.
- E2F1's role in neuronal death induced by physiological insults like oxygen-glucose deprivation (OGD) and anoxia requires further investigation.
Purpose of the Study:
- To investigate the role of E2F1 in neuronal death caused by OGD and anoxia.
- To assess the impact of E2F1 absence on neuronal survival and synaptic function following ischemic conditions.
Main Methods:
- Utilized mouse cortical cultures and hippocampal slices subjected to OGD and anoxia.
- Compared neuronal death and synaptic transmission recovery in E2F1(+/+) and E2F1(-/-) models.
- Measured intracellular calcium concentration and NMDA receptor subunit mRNA expression.
Main Results:
- E2F1(-/-) cultures exhibited significantly reduced neuronal death 24 and 48 hours after OGD compared to E2F1(+/+) cultures.
- Absence of E2F1 improved the recovery of synaptic transmission in CA1 neurons following transient anoxia.
- E2F1 mRNA levels were significantly increased following OGD.
Conclusions:
- E2F1 plays a crucial role in modulating neuronal death induced by OGD and anoxia.
- E2F1 deficiency confers neuroprotection against ischemic insults.
- Targeting E2F1 may offer therapeutic potential for conditions involving cerebral ischemia.
