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Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
Neuroprotective role of taurine during aging
Abdeslem El Idrissi1, Chang Hui Shen, William J L'amoreaux
1Department of Biology, Center for Developmental Neuroscience, City University of New York Graduate School, Staten Island, NY, 10314, USA, abdeslem.elidrissi@csi.cuny.edu.
Amino Acids
|August 22, 2013
Summary
Taurine supplementation improved spatial memory in aged mice by enhancing the brain's GABAergic system. This dietary intervention counteracted age-related declines in neurotransmitter levels and neuronal function, suggesting a protective role for taurine.
Area of Science:
- Neuroscience
- Aging Research
- Neurochemistry
Background:
- Brain aging involves neurochemical changes, including decreased GABA receptors and glutamate decarboxylase (GAD), impacting cognitive functions like memory.
- Age-related decline in cognitive abilities may stem from reduced GABA inhibitory neurotransmission.
Purpose of the Study:
- To investigate the effects of chronic taurine supplementation on age-dependent cognitive decline in mice.
- To examine taurine's impact on the GABAergic and somatostatinergic systems in the aging brain.
Main Methods:
- Administered chronic taurine supplementation to aged mice.
- Assessed spatial memory acquisition and retention.
- Analyzed neurochemical changes in the hippocampus, including neurotransmitter levels, GAD expression, GABA receptor subunits, and neuronal populations.
- Recorded electrophysiological responses in hippocampal CA1 regions.
Main Results:
- Taurine supplementation significantly improved spatial memory in aged mice.
- Taurine increased GABA and glutamate levels and both GAD isoforms (65 and 67) expression.
- Taurine increased somatostatin levels and the number of somatostatin-positive neurons.
- Taurine decreased hippocampal expression of GABAA receptor β3 subunits.
- Electrophysiological recordings showed enhanced synaptic function in the hippocampus.
Conclusions:
- Taurine supplementation counteracts age-related deficits in spatial memory and neurochemical alterations.
- Taurine positively modulates the GABAergic and somatostatinergic systems, opposing age-induced changes.
- Taurine shows potential as a protective agent against age-related cognitive decline through its interaction with the GABAergic system.
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