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Acetaminophen (paracetamol) affects empathy-like behavior in rats: Dose-response relationship
Sevim Kandis1, Mehmet Ates2, Servet Kizildag2
1Department of Physiology, Dokuz Eylul University, School of Medicine, Izmir, Turkey.
Pharmacology, Biochemistry, and Behavior
|October 26, 2018
Summary
Acetaminophen (paracetamol) reduces empathy-like behavior in rats by decreasing oxytocin and vasopressin levels in key brain regions. This common pain reliever may impact social cognition and emotional processing.
Area of Science:
- Neuroscience
- Psychopharmacology
- Animal Behavior
Background:
- Empathy is crucial for social interaction and prosocial behavior.
- Impaired empathy is linked to aggression and criminal behavior.
- Acetaminophen (paracetamol), a common analgesic, has been previously associated with reduced empathy in humans.
Purpose of the Study:
- To investigate the effects of acetaminophen on empathy-like behavior in Sprague Dawley rats.
- To explore the underlying neurohormonal mechanisms, specifically oxytocin and vasopressin levels, affected by acetaminophen exposure.
Main Methods:
- Empathy-like behavior was assessed in rats 30 minutes after acetaminophen administration (100, 200, 400 mg/kg).
- The impact of single high-dose and repeated low-dose acetaminophen on empathy-like behavior and anxiety was evaluated.
- Oxytocin and vasopressin levels in the prefrontal cortex and amygdala were analyzed.
Main Results:
- A single high dose of acetaminophen reduced empathy-like behavior.
- Repeated low-dose acetaminophen administration also decreased empathy-like behavior.
- Acetaminophen exposure led to decreased oxytocin and vasopressin levels in the prefrontal cortex and amygdala.
- A negative correlation was observed between enhanced empathic behavior (delay in door opening) and prefrontal cortex oxytocin levels.
Conclusions:
- Acetaminophen administration, both single high-dose and repeated low-dose, impairs empathy-like behavior in rats.
- These behavioral changes correlate with reduced oxytocin and vasopressin levels in the prefrontal cortex and amygdala.
- Findings suggest a potential mechanism linking acetaminophen, oxytocin, and empathy-like behavior, warranting further investigation into other empathic brain pathways.
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