Subacute Iron Exposure in Rats Induces Behavioral Impairments, Oxidative Stress, and Histopathological Alterations

Area of Science:

• Neuroscience
• Toxicology
• Biochemistry

Background:

• Iron overload poses risks to brain health, potentially causing behavioral, biochemical, and structural issues.
• Maintaining iron homeostasis is crucial, especially in conditions associated with iron dysregulation.

Purpose of the Study:

• To investigate the neurobehavioral and neurobiological effects of short-term, subacute iron exposure.
• To model and assess the impact of excess iron on brain integrity and function.

Main Methods:

• Male Wistar rats were administered ferrous sulfate (10 mg/kg) intraperitoneally daily for five days.
• Neurobehavioral tests included Open Field Test (OFT), Elevated Plus Maze (EPM), Free Exploration Test (FET), and Light/Dark Box (LDB).
• Biochemical assays measured oxidative stress markers (MDA, SOD, CAT), and histopathology examined brain regions (cerebellum, hippocampus, prefrontal cortex, striatum).

Main Results:

• Iron exposure led to increased anxiety-like behaviors, decreased exploratory activity, and heightened immobility in rats.
• Biochemical analysis revealed elevated malondialdehyde (MDA) and reduced superoxide dismutase (SOD) and catalase (CAT) activities, indicating significant oxidative stress.
• Histopathology showed neuronal misalignment, vacuolation, and early neurodegeneration in key brain areas.

Conclusions:

• Short-term, repeated iron exposure induces significant neurobehavioral changes and oxidative damage in the brain.
• Structural alterations, including neurodegeneration signs, accompany the observed functional deficits.
• These findings emphasize the importance of monitoring iron levels to prevent neurotoxicity and manage iron-related disorders.