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Updated: Jun 22, 2026
Efficient Derivation of Human Neuronal Progenitors and Neurons from Pluripotent Human Embryonic Stem Cells with Small Molecule Induction
Published on: October 28, 2011
Erk1/2 promotes proliferation and inhibits neuronal differentiation of neural stem cells
Bin Wang1, Yuan Gao, Zhifeng Xiao
1Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100190, China.
Abstract:
Neural stem cells (NSCs) are in a complex niche in which cell-extrinsic cues and cell-intrinsic genetic mechanisms in chorus mediate their cellular processes such as self-renewal and differentiation. In this study, we found that inactivation of Erk1/2 with U0126 in NSCs significantly promoted neuronal differentiation and inhibited proliferation. Sustained Erk1/2 inactivity was required in this process. We also found that nerve growth factor (NGF) and collagen could promote the proliferation and inhibit neuronal differentiation by activating phosphorylation of Erk1/2. Cell-cycle regulators such as cyclin-dependent kinase 2 (Cdk2), Cyclin D1 and Hes1 mediated the effect of Erk on NSCs proliferation and differentiation. Our results showed that Erk1/2 played an important role in the interplay between cell-extrinsic cues and cell-intrinsic genetic mechanisms in neural stem cell biology.
Insights
Inactivating Erk1/2 in neural stem cells (NSCs) promotes neuronal differentiation and inhibits proliferation. This pathway is crucial for how external cues and internal genetics control NSC behavior.
Area of Science:
- Neuroscience
- Stem Cell Biology
- Cell Signaling
Background:
- Neural stem cells (NSCs) self-renewal and differentiation are regulated by complex interactions.
- Cell-extrinsic cues and cell-intrinsic genetic mechanisms interplay to control NSC fate.
Purpose of the Study:
- To investigate the role of Erk1/2 signaling in regulating neural stem cell (NSC) proliferation and differentiation.
- To elucidate how external factors like nerve growth factor (NGF) and collagen influence Erk1/2 activity in NSCs.
Main Methods:
- Inactivation of Erk1/2 using the inhibitor U0126 in NSCs.
- Treatment of NSCs with nerve growth factor (NGF) and collagen.
- Analysis of cell-cycle regulators including Cdk2, Cyclin D1, and Hes1.
Main Results:
- Erk1/2 inactivation significantly promoted neuronal differentiation and inhibited NSC proliferation.
- Sustained Erk1/2 inactivity was necessary for these effects.
- NGF and collagen promoted proliferation and inhibited differentiation by activating Erk1/2 phosphorylation.
- Cell-cycle regulators mediated Erk's effects on NSC proliferation and differentiation.
Conclusions:
- Erk1/2 signaling is a key mediator in the interplay between extrinsic cues and intrinsic mechanisms governing neural stem cell biology.
- Modulating Erk1/2 activity offers a potential strategy for controlling NSC fate for therapeutic applications.
