Oxidative Stress Response in Behavioral Models

Oxidative stress arises when the production of reactive oxygen species (ROS) overwhelms endogenous antioxidant defences, leading to damage of lipids, proteins and nucleic acids. In behavioural models, particularly rodent paradigms such as repeated restraint, forced swim and tail suspension tests, stressors activate the hypothalamic-pituitary-adrenal (HPA) axis, elevating glucocorticoids and driving redox imbalances in brain regions implicated in mood and cognition. These models reveal how chronic or acute stress triggers cascades of neuronal inflammation, mitochondrial dysfunction and cell death pathways including apoptosis and pyroptosis. By quantifying markers such as malondialdehyde, reduced glutathione and activities of superoxide dismutase and catalase, researchers can map the interplay between stress-induced behavioural changes and underlying oxidative injury. This approach highlights the contribution of oxidative stress to anxiety- and depression-like phenotypes, offering insight into neurodegenerative and psychiatric disorders. Moreover, it provides a platform to evaluate antioxidant strategies and to elucidate fundamental mechanisms linking environmental stressors to neural health.

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Oxidative Stress Response in Behavioral Models publication trend

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Technical terms

Reactive oxygen species (ROS): Highly reactive molecules derived from oxygen metabolism that can damage cellular components if not neutralised.

Antioxidant enzymes: Endogenous proteins such as superoxide dismutase, catalase and glutathione peroxidase that detoxify ROS.

Malondialdehyde (MDA): A by-product of lipid peroxidation used as a marker of oxidative membrane damage.

Pyroptosis: A form of programmed cell death characterised by inflammasome activation and membrane pore formation, often linked to inflammation.

Hypothalamic-pituitary-adrenal (HPA) axis: The neuroendocrine system that governs stress hormone release and orchestrates physiological responses to stress.

References

1. The effect of calpain inhibitor-I on copper oxide nanoparticle-induced damage and cerebral ischemia-reperfusion in a rat model. Biomedicine & Pharmacotherapy (2024).
2. Restraint Stress-Induced Immunosuppression Is Associated with Concurrent Macrophage Pyroptosis Cell Death in Mice. International Journal of Molecular Sciences (2023).
3. Activation of the hypothalamic-pituitary-adrenal stress axis induces cellular oxidative stress. Frontiers in Neuroscience (2015).
4. Neuroprotective Effects of Cornus officinalis on Stress-Induced Hippocampal Deficits in Rats and H2O2-Induced Neurotoxicity in SH-SY5Y Neuroblastoma Cells. Antioxidants (2019).