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Transthyretin influences spatial reference memory.

João Carlos Sousa1, Fernanda Marques, Eduardo Dias-Ferreira

  • 1Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.

Neurobiology of Learning and Memory
|August 19, 2007
PubMed
Summary
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Transthyretin (TTR) deficiency impairs spatial memory in young mice. The absence of TTR accelerates age-related cognitive decline, suggesting TTR plays a crucial role in maintaining learning and memory functions.

Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Transthyretin (TTR) is a key transport protein in plasma and cerebrospinal fluid.
  • TTR binds thyroxine, retinol, and amyloid beta peptide.
  • Reduced TTR levels are observed in Alzheimer's disease cerebrospinal fluid.

Purpose of the Study:

  • To investigate the role of TTR in learning and memory.
  • To assess the impact of TTR deficiency on cognitive performance across different age groups.

Main Methods:

  • Studied young adult and old TTR-null 129/Sv mice.
  • Compared cognitive performance in spatial reference memory tasks with age-matched wild-type mice.

Main Results:

  • Five-month-old TTR-null mice exhibited spatial reference memory impairment compared to wild-type controls.

Related Experiment Videos

  • Aging worsened memory performance in wild-type mice, but not in TTR-null mice.
  • No significant differences in spatial reference memory were found between old TTR-null and wild-type mice.

    • Conclusions:

    • The absence of TTR appears to accelerate age-related cognitive decline.
    • TTR deficiency leads to early-onset spatial memory deficits.
    • TTR is critical for maintaining cognitive function during aging.