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Reelin and apoE actions on signal transduction, synaptic function and memory formation
Justin T Rogers1, Edwin J Weeber
1Department of Molecular Pharmacology and Physiology, Johnnie B Byrd Sr. Alzheimer's Center & Research Institute, University of South Florida, 4001 East Fletcher Ave., Tampa FL 33613, USA.
Neuron Glia Biology
|August 14, 2009
Summary
Low-density-lipoprotein receptors (LDLRs) and their ligands, apolipoprotein E and reelin, are crucial for synaptic plasticity and memory in the brain. These molecules also play significant roles in neurodegenerative diseases like Alzheimer's.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Low-density-lipoprotein receptors (LDLRs) are ancient cell surface proteins involved in extracellular signal transduction in the central nervous system (CNS).
- Emerging evidence highlights their critical roles in synaptic plasticity, learning, and memory, particularly within the hippocampus.
- Apolipoprotein E (apoE) and reelin are key LDLR ligands investigated for their influence on neuronal function.
Purpose of the Study:
- To review the role of LDLRs, apoE, and reelin in regulating hippocampal synaptic plasticity.
- To explore the involvement of these molecules in learning, memory, and neurodegenerative diseases.
Main Methods:
- Review of existing literature on LDLRs, apoE, and reelin.
- Analysis of studies utilizing recombinant proteins, knockout/transgenic mouse models, and human ApoE targeted replacement mice.
Main Results:
- LDLRs, apoE, and reelin modulate hippocampal long-term potentiation.
- These molecules specifically affect NMDA and AMPA receptor regulation.
- Dysregulation of these pathways is implicated in neurodegenerative conditions like Alzheimer's disease.
Conclusions:
- LDLRs, apoE, and reelin are significant regulators of hippocampal synaptic plasticity.
- Understanding their signaling pathways is vital for addressing cognitive deficits and neurodegenerative diseases.
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