Related Experiment Video
Updated: Jul 20, 2026
07:43
An Enzyme- and Serum-free Neural Stem Cell Culture Model for EMT Investigation Suited for Drug Discovery
Published on: August 23, 2016
Dexamethasone-Induced Effects on B-50/GAP-43 Expression and Neurite Outgrowth in PC 12 Cells
E R A Jap Tjoen San1, M Schmidt-Michels1, A B Oestreicher2
1Division of Molecular Neurobiology, Institute of Molecular Biology and Medical Biotechnology, Rudolf Magnus Institute. University of Utrecht, Padualaan 8, 3584, CH Utrecht, Netherlands.
Journal of Molecular Neuroscience : MN
|April 8, 2017
Summary
Nerve growth factor (NGF) and dexamethasone (DEX) affect B-50/GAP-43 protein levels and neurite outgrowth in PC 12 cells. B-50/GAP-43 is crucial for NGF-induced neurite extension, with DEX modulating these effects.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- PC 12 cells are a model system for neuronal differentiation.
- B-550/GAP-43 is a nervous system-specific protein implicated in neurite outgrowth.
Purpose of the Study:
- To investigate the role of B-50/GAP-43 in NGF-induced neuritogenesis in PC 12 cells.
- To determine the effects of dexamethasone (DEX) on B-50/GAP-43 levels and neurite outgrowth.
Main Methods:
- PC 12 cells were treated with NGF and/or DEX.
- B-50/GAP-43 protein levels were measured.
- Neurite outgrowth was quantified.
Main Results:
- NGF treatment increased B-50/GAP-43 levels and neurite outgrowth, peaking at 24 hours.
- DEX inhibited B-50/GAP-43 expression and neurite outgrowth, but NGF could still enhance B-50/GAP-43 levels in the presence of DEX.
- The findings suggest a tight coupling between B-50/GAP-43 levels and neurite outgrowth.
Conclusions:
- The basal level of B-50/GAP-43 is sufficient to initiate NGF-induced neuritogenesis.
- DEX and NGF appear to act via distinct mechanisms to regulate B-50/GAP-43 and neurite outgrowth.
- A threshold level of B-50/GAP-43 may be necessary for significant neurite outgrowth.
