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Investigation of the effects of a new synthetic iron nanochelator on neuronal excitability in the presence and absence of oxidative stress

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Author(s): Zahra Ghasemi | Saeedeh Fakharzadeh | Mohammad Hassan Nazaran | Mahyar Janahmadi

Journal: Physiology and Pharmacology
ISSN 1735-0581

Volume: 16;
Issue: 2;
Start page: 95;
Date: 2012;
Original page

Keywords: Iron nanochelator | H2O2 | Intracellular recording | Neuronal excitability | Ion channels

ABSTRACT
Introduction: Oxidative stress is one of the important pathologic factors involved in the pathogenesis of neurodegenerative diseases. Antioxidants as neutralizing agents of free radicals are one of the treatment options for these diseases and antioxidant agents that can pass through blood brain barrier have beneficial effects. In the present research, the antioxidant effect of a new iron nanochelator on the electrophysiological characteristics of neural cells following H2O2– induced oxidative stress was investigated. Methods:Intracellular recordings were made under the current clamp condition on F1 cells of Helix aspersa. Effects of oxidant agent, H2O2(1 mM), in the presence of the new iron nanochelator at high (2.63 mM) and low (263 µM) concentrations were assessed on the firing pattern and action potential parameters and were compared to the control condition. Results:Application of H2O2led to a significant decrease in the firing pattern and AP amplitude and an increase in the time to peak compared with control condition. Addition of the antioxidant following H2O2treatment increased these parameters and restored them to the control condition. On the other hand, effects of H2O2 on the electrical activity of cell were modulated when the antioxidant was used earlier. Conclusion:Based on the modulating effects of the new synthesized iron nanochelator on verified action potential parameters in the presence of H2O2, it can be concluded that nanochelator probably exerts its antioxidant effects through the alterations of the function of ion channels.
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