Regulatory T cells in children with attention deficit hyperactivity disorder: A case-control study

Area of Science:

• Immunology
• Neuroscience
• Pediatrics

Background:

• Attention deficit hyperactivity disorder (ADHD) pathophysiology remains unclear.
• Immune system dysregulation is a potential factor due to links with allergies and inflammation.
• This study investigates immune cells in children with ADHD.

Purpose of the Study:

• To evaluate peripheral lymphocyte subpopulations in children with ADHD.
• To specifically assess regulatory T cells (Tregs) in children diagnosed with ADHD.
• To explore the relationship between immune cell profiles and ADHD.

Main Methods:

• A case-control study involving 49 children with ADHD and 35 healthy controls (ages 7-12).
• Psychopathology screened using the Kiddie Schedule for Affective Disorders and Schizophrenia.
• ADHD symptom severity assessed via the distracted-Continuous Performance Test.
• Peripheral lymphocyte subpopulations and Tregs analyzed using flow cytometry.

Main Results:

• No significant differences in overall peripheral blood lymphocyte subsets between groups.
• Children with ADHD showed significantly higher levels of regulatory T cells (Tregs) compared to controls (p=0.004).
• Regression analysis indicated Tregs were statistically significant and associated with increased ADHD probability (p=0.042).

Conclusions:

• Elevated Treg levels are associated with a higher likelihood of ADHD.
• Immune regulatory cell changes may be a significant factor in ADHD.
• This research suggests potential avenues for ADHD treatment focusing on immune regulation.