Inbred mice strain shows neurobehavioral changes when exposed to tannery effluent

Area of Science:

• Environmental toxicology
• Neuroscience
• Mammalian toxicology

Background:

• Tanning industries generate toxic waste, posing environmental and health risks.
• Limited research exists on the neurobehavioral impact of tannery effluent ingestion in mammals.
• This study addresses the knowledge gap regarding tannery effluent neurotoxicity.

Purpose of the Study:

• To investigate the neurobehavioral effects of chronic tannery effluent exposure in male C57BL/6J mice.
• To evaluate potential anxiety, depression, and memory deficits induced by effluent intake.
• To determine dose-dependent effects of tannery effluent on animal behavior.

Main Methods:

• Male C57BL/6J mice were exposed to 0.1%, 1%, and 5% tannery effluent concentrations for 120 days.
• Behavioral tests included elevated plus maze (EPM), open-field (OF), neophobia test, forced swim test, and object recognition test.
• Neurobehavioral outcomes assessed included anxiety, depression, and memory-related behaviors.

Main Results:

• Tannery effluent exposure increased anxiety scores in the EPM test.
• Anxiogenic behavior was indicated by increased latency to eat in the neophobia test.
• Increased immobility in the forced swim test suggested depression-predictive behavior.
• No significant differences in central locomotion (OF) or object recognition were observed.

Conclusions:

• Chronic intake of tannery effluents induces neurobehavioral changes indicative of anxiety and depression in mice.
• No significant memory deficits were detected in the exposed animals.
• These findings highlight the potential neurotoxic risks of tannery waste on mammalian health.