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Aversive Associative Learning and Memory Formation by Pairing Two Chemicals in Caenorhabditis elegans
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Dab1 is required for synaptic plasticity and associative learning.

Justin Trotter1, Gum Hwa Lee, Tatiana M Kazdoba

  • 1Department of Molecular Pharmacology and Physiology, USF Health Byrd Alzheimer's Institute, University of South Florida, Tampa, Florida 33613, Department of Cell Biology and Neuroscience and Graduate Program in Neuroscience, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, and Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, California 92037.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|September 27, 2013
PubMed
Summary
This summary is machine-generated.

Disabled-1 (Dab1) protein is crucial for adult brain function, regulating synaptic plasticity and learning. Conditional knockout mice show impaired learning and memory due to Dab1 deletion in excitatory neurons.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Developmental Biology

Background:

  • Disabled-1 (Dab1) is an adaptor protein essential for Reelin signaling, critical for neuronal development.
  • Reelin pathway components are expressed in both developing and adult brains.

Purpose of the Study:

  • To investigate the role of Dab1 in the adult forebrain.
  • To develop a conditional knockout mouse model for studying Dab1 function in adult excitatory neurons.

Main Methods:

  • Generated an adult forebrain-specific, excitatory neuron-specific conditional knockout mouse line for Dab1.
  • Analyzed Dab1 expression patterns in postnatal and adult forebrain.
  • Assessed synaptic function, learning, and memory in knockout mice.

Main Results:

  • Dab1 is expressed in excitatory and inhibitory neurons, localized in various cellular compartments.
  • Conditional knockout of Dab1 in adult excitatory neurons impaired hippocampal-dependent learning and spatial memory.
  • Reduced dendritic spine size and defects in Akt/ERK signaling were observed.
  • No significant changes in neuronal positioning, dendrite morphology, spine density, or synaptic composition were noted.

Conclusions:

  • Reelin-Dab1 signaling plays a critical role in adult forebrain synaptic function.
  • This pathway is essential for learning and memory processes in the adult brain.