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Updated: May 30, 2026
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Methods for the Modulation and Analysis of NF-κB-dependent Adult Neurogenesis
Published on: February 13, 2014
Nuclear factor κB-dependent neurite remodeling is mediated by Notch pathway
Sara Anna Bonini1, Giulia Ferrari-Toninelli, Daniela Uberti
1Department of Biomedical Sciences and Biotechnologies, University of Brescia, 25123 Brescia, Italy.
Summary
Nuclear factor kappa B (NF-κB) and Notch signaling pathways interact to regulate neuronal structure. Loss of NF-κB p50 subunit impairs cortical neuron morphology, dependent on Notch pathway activation.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- The interplay between signaling pathways is crucial for neuronal development and function.
- Nuclear factor kappa B (NF-κB) and Notch signaling are key regulators in cellular processes, including neuronal plasticity.
Purpose of the Study:
- To investigate the potential crosstalk between NF-κB and Notch signaling in primary cortical neurons.
- To determine the role of this interaction in regulating neuronal morphology and network formation.
Main Methods:
- Utilized p50(-/-) mice and acute inhibition of p50 nuclear translocation to study NF-κB deficiency.
- Employed γ-secretase inhibitor DAPT and Notch RNA interference to modulate Notch signaling.
- Analyzed neuronal morphology, neurite branching, and varicosities.
- Examined Notch1 and Jagged1 expression and distribution via immunoreactivity.
Main Results:
- Lack of p50 in cortical neurons led to reduced neurite branching, loss of varicosities, and hyperactivation of Notch1 signaling.
- Morphological defects in p50(-/-) neurons were rescued by DAPT treatment or Notch RNA interference, indicating Notch dependency.
- The p50 subunit was identified as a transcriptional repressor of the Notch ligand Jagged1.
- Altered distribution of Notch1 and Jagged1 was observed in the cortex of p50(-/-) mice.
Conclusions:
- NF-κB and Notch signaling pathways exhibit crosstalk that significantly influences cortical neuron morphology.
- The p50 subunit of NF-κB negatively regulates Jagged1, thereby controlling Notch signaling.
- This crosstalk is critical for maintaining structural plasticity in the developing cortex, with implications for physiological and pathological conditions.
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