Modafinil Administration to Preadolescent Rat Impairs Non-Selective Attention, Frontal Cortex D₂ Expression and...

Area of Science:

• Neuroscience
• Pharmacology
• Neurochemistry

Background:

• Psychostimulant misuse, including modafinil (MOD) as a neuropotentiator, is rising among young people.
• While MOD is explored for ADHD treatment, its effects on healthy young brains require investigation due to early psychostimulant use and ADHD misdiagnosis rates.

Purpose of the Study:

• To assess the impact of chronic MOD treatment on neurochemicals (GABA, glutamate), dopamine D2 receptor expression, and non-selective attention (NSA) in the mesocorticolimbic system of young, healthy rats.

Main Methods:

• Preadolescent male Sprague-Dawley rats received daily MOD (75 mg/kg) or vehicle for 14 days.
• Neurochemical (GLU, GABA) and D2 receptor levels were measured in the nucleus accumbens (NAc), ventral tegmental area (VTA), and prefrontal cortex (PFC).
• Behavioral testing assessed non-selective attention (NSA).

Main Results:

• Chronic MOD administration during adolescence led to reduced D2 receptor expression in the PFC.
• MOD treatment decreased GABA levels in the VTA.
• Significant alterations in NSA behavior were observed, alongside changes in GLU and GABA levels in the NAc.

Conclusions:

• Adolescent MOD exposure induces neurochemical and behavioral changes within the mesocorticolimbic system.
• Findings highlight potential neurological risks associated with chronic MOD use in healthy young individuals.
• This study contributes to understanding the effects of neuropotentiator abuse on the developing brain.