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Analysis of Learning and Memory Ability in an Alzheimer's Disease Mouse Model using the Morris Water Maze
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Early Life Exposure to C16-Ceramide Improves Learning and Short-Term Memory Behavior during Adulthood in Mice.

Chia-Min Yeh1, Yun-Ya Sun1, Ting-Yu Chen1

  • 1Department of Life Science, National Taiwan Normal University, 88 Ting-Chou Road, Section 4, Taipei 11677, Taiwan.

ACS Chemical Neuroscience
|April 7, 2023
PubMed
Summary

Early C16-ceramide administration enhances adult learning and memory in mice. This intervention improved cognitive function without impacting glucose metabolism, suggesting a novel therapeutic avenue for memory enhancement.

Keywords:
Alzheimer’s diseaseC16-ceramideCaMKIIErkJ20 micelearning and memory

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Ceramides are crucial cellular components involved in glucose metabolism and apoptosis.
  • The specific role of C16-ceramide in learning and memory remains unexplored.
  • Investigating endogenous lipid signaling in cognitive function is of significant interest.

Purpose of the Study:

  • To determine the effects of early-life C16-ceramide administration on adult learning and memory.
  • To elucidate the underlying molecular mechanisms of C16-ceramide's impact on cognition.
  • To assess the efficacy of C16-ceramide in an Alzheimer's disease mouse model.

Main Methods:

  • C16-ceramide was administered to mice post-weaning.
  • Learning and memory behaviors were assessed in adulthood using behavioral tests.
  • In vitro studies on primary neurons investigated molecular signaling pathways.
  • Epigenetic modifications and gene expression were analyzed.
  • J20 mice (Alzheimer's model) were treated with C16-ceramide and tested using the Morris water maze.

Main Results:

  • Mice receiving early C16-ceramide exhibited enhanced learning and short-term memory in adulthood.
  • Glucose metabolism remained unaffected by the C16-ceramide treatment.
  • In vitro neuronal studies revealed increased calcium influx, CaMKII/CREB, and Erk signaling.
  • Upregulation of H3K4 methylation and Egr-1 abundance was observed.
  • C16-ceramide treatment improved cognitive performance in J20 Alzheimer's model mice.

Conclusions:

  • Early-life administration of C16-ceramide beneficially impacts adult learning and short-term memory.
  • The observed cognitive benefits are associated with specific intracellular signaling pathways and epigenetic changes.
  • C16-ceramide shows potential as a therapeutic agent for cognitive enhancement and in Alzheimer's disease models.