Metabolic Profiling of Suprachiasmatic Nucleus Reveals Multifaceted Effects in an Alzheimer’s Disease Mouse Model

Apr 12, 2021Journal of Alzheimer's disease : JAD

Metabolic changes in the brain's internal clock system in a mouse model of Alzheimer's disease

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Abstract

Significant metabolic deficits were observed in the superchiasmatic nucleus (SCN) of Tg2576 Alzheimer's disease mice.

  • Reductions in glucose, glutamate, , and glutamine indicate impaired GABAergic glucose oxidation and neurotransmitter cycling.
  • Low levels of the redox co-factor NADPH and glutathione suggest a state of redox disbalance.
  • There is decreased expression of the core clock protein Bmal1, particularly in activated astrocytes.
  • A reduction in GABA transporter 1 (GAT1) expression in astrocytes points to decreased GABA recycling.

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Key numbers

significantly reduced in SCN of
Decrease in levels
Comparison of levels in SCN of Tg2576 vs. wild-type mice.
Glucose and glutamate levels significantly decreased in SCN of
Reduction in glucose and glutamate
Metabolic profiling of SCN in Tg2576 vs. wild-type mice.

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