Impaired spatial learning in the Morris water maze induced by serotonin reuptake inhibitors in rats

Area of Science:

• Neuroscience
• Pharmacology
• Behavioral Science

Background:

• Selective serotonin reuptake inhibitors (SSRIs) are widely prescribed antidepressants.
• Their effects on cognitive functions, particularly spatial learning, require further investigation.

Purpose of the Study:

• To evaluate the impact of citalopram and fluoxetine on spatial learning in a rat model.
• To determine if SSRIs induce deficits in complex spatial tasks.

Main Methods:

• Adult male rats were trained in the Morris water maze for four days.
• Animals received daily intraperitoneal injections of varying doses of citalopram or fluoxetine, or their respective vehicles, before training.

Main Results:

• Citalopram (4 and 8 mg/kg) and fluoxetine (8 and 16 mg/kg) significantly increased latencies and traveled distances to find the hidden platform.
• These findings indicate dose-dependent impairments in spatial learning.

Conclusions:

• SSRIs, including citalopram and fluoxetine, can negatively affect spatial learning abilities.
• These results suggest potential cognitive side effects of SSRIs in complex learning tasks.