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Published on: April 23, 2019
Synaptic Zn(2+) homeostasis and its significance
Atsushi Takeda1, Masatoshi Nakamura, Hiroaki Fujii
1Department of Bioorganic Chemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan. takedaa@u-shizuoka-ken.ac.jp
Metallomics : Integrated Biometal Science
|February 21, 2013
Summary
Zinc homeostasis is crucial for brain function, impacting synaptic signaling and cognitive abilities. Maintaining balanced zinc levels in the brain is essential for healthy neurological development and function.
Area of Science:
- Neuroscience
- Biochemistry
- Physiology
Background:
- Serum zinc levels are linked to hypothalamic-pituitary-adrenal (HPA) axis activation and glucocorticoid levels.
- Zinc homeostasis is vital for physiological functions, maintained in the brain by specialized barriers.
- Chronic zinc deficiency in youth suppresses brain extracellular fluid zinc and synaptic vesicle zinc, impacting development.
Purpose of the Study:
- To summarize the significance of synaptic zinc (Zn(2+)) homeostasis in zincergic neuron activity.
- To explore the role of Zn(2+) signaling in synaptic plasticity and cognitive function.
- To highlight the relationship between synaptic Zn(2+) pools and glutamatergic neuron activity.
Main Methods:
- Review of existing literature on zinc homeostasis and its effects on the brain.
- Analysis of the mechanisms controlling Zn(2+) release and reuptake in synaptic vesicles and extracellular spaces.
- Discussion of the impact of altered Zn(2+) signaling on synaptic plasticity and cognition.
Main Results:
- Zn(2+) acts as a signal in both intracellular and extracellular compartments, released from glutamatergic neuron terminals.
- Synaptic Zn(2+) signals are implicated in synaptic plasticity, including long-term potentiation (LTP) and cognitive functions.
- Both deficiency and excess of synaptic Zn(2+) can negatively affect cognitive processes.
Conclusions:
- Synaptic Zn(2+) homeostasis is critical for normal brain function and is regulated by synaptic vesicle and extracellular zinc pools.
- Dysregulation of synaptic Zn(2+) homeostasis, particularly in zincergic neurons, impacts cognitive activity.
- Further research is needed to fully elucidate the precise role of Zn(2+) signaling in cognitive functions.
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