Effects of the Recurrent and Different Doses of Ketamine Exposure on Anxiety-like Behaviors and Locomotor Activity in Juvenile Rats

Repeated exposure to 50 mg/kg ketamine in juvenile male rats increased anxiety-like behavior, impaired memory and spatial navigation, and altered grooming and transition behaviors compared to saline controls. Lower doses (5 and 20 mg/kg) produced mixed effects, with 20 mg/kg reducing anxiety as measured by light-zone time. The study suggests dose-dependent long-term behavioral effects of ketamine in juvenile rats.

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Abstract

Background: Ketamine is a widely used anesthetic agent. Although the potential adverse effects of ketamine use in juvenile age are uncertain, certain studies reported that children exposed to recurrent anesthesia could face an increased risk of neurodevelopmental deficits in motor function and behavioral risks. We aimed to investigate the long-term effects of repeated exposure to various ketamine doses on anxious behavior and locomotor activity in juvenile rats. background: Ketamine is a widely used anesthetic agent. Although the potential adverse effects of ketamine use in juvenile age are uncertain, certain studies reported that children exposed to recurrent anesthesia could face an increased risk of neurodevelopmental deficits in motor function and behavioral risks. Objective: We aimed to investigate the long-term effects of repeated exposure to various ketamine doses on anxious behavior and locomotor activity in juvenile rats. objective: We aimed to investigate the long-term effects of repeated exposure to various ketamine doses on anxious behavior and locomotor activity in juvenile rats. Methods: Thirty-two Wistar Albino juvenile male rats were randomized into 5 mg/kg, 20 mg/kg, and 50 mg/kg ketamine (KET) and saline (Group C) Groups and KET was administered for 3 consecutive days at 3-hour intervals in 3 doses. Ten days after the last KET dose, behavioral parameters were analyzed with an open field test (OFT), elevated plus maze (EPM), and light-dark box (LDB). Statistical analysis was conducted with One-Way ANOVA and Tukey test. method: Thirty-two Wistar Albino juvenile male rats were randomized into 5 mg/kg, 20 mg/kg and 50 mg/kg ketamine (KET) and saline (Group C) Groups and KET was administered for 3 consecutive days at 3-hour intervals in 3 doses. Ten days after the last KET dose, behavioral parameters were analyzed with open field test (OFT), elevated plus maze (EPM) and light dark box (LDB). Statistical analysis was conducted with One-Way ANOVA and Tukey test. Results: Unsupported rearing behavior decreased in 5 and 50 mg/kg KET Groups when compared to Group C. Incorrect transition time, total grooming time, and transfer latency time increased significantly in the 50 mg/kg KET Group when compared to Group C. result: Unsupported rearing behavior decreased in 5 and 50 mg/kg KET Groups when compared to Group C. Incorrect transition time, total grooming time, stretched attend posture, and transfer latency time increased significantly in 50 mg/kg KET Group when compared to Group C. These results suggested that 50 mg/kg KET led to higher anxiety. Light zone time decreased in only 20 mg/kg KET Group, where anxiety was lower. Conclusion: These results suggested that 50 mg/kg KET led to anxiety-like behavior and destroyed memory and spatial navigation. Ketamine doses were associated with late effects of ketamine on anxiety-like behavior in juvenile rats. Further studies are needed to determine the mechanisms that play a role in the different effects of ketamine doses on anxiety and memory. conclusion: Ketamine doses were associated with late effects of ketamine on the anxiety-like behavior in juvenile rats. Further studies are needed to determine the mechanisms that play a role in different effects of ketamine doses on anxiety. other: -