Transdiagnostic Behavioral Phenotypes and Comorbid Gastrointestinal Symptoms in Neurodevelopmental Disorders: An...

Area of Science:

• Neuroscience
• Developmental Psychology
• Genetics

Background:

• Neurodevelopmental disorders (NDD), such as autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD), present with diverse behavioral patterns and overlapping symptoms.
• Understanding these variations is crucial for effective diagnosis and intervention.

Purpose of the Study:

• To identify behavior-based subgroups within a cohort of children diagnosed with NDD.
• To investigate the relationship between gastrointestinal (GI) symptoms and behavioral phenotypes in these subgroups.

Main Methods:

• Utilized a heterogeneous mixture model (HMM) on behavioral data from 1716 participants (typically developing, ASD, ADHD).
• Analyzed data from the Province of Ontario Neurodevelopmental Disorders (POND) network.
• Examined the prevalence of GI symptoms across identified behavioral clusters.

Main Results:

• Six distinct behavioral clusters were identified.
• Five clusters comprised individuals with mixed diagnoses (typically developing, ASD, ADHD).
• One cluster, exclusively containing participants with ASD and ADHD, exhibited the most severe behavioral phenotype and significantly higher prevalence of GI symptoms.

Conclusions:

• Behavioral dimensions, rather than diagnostic labels alone, are essential for delineating NDD subgroups.
• The strong association between severe behavioral phenotypes and GI symptoms highlights the potential role of the gut-brain axis in NDD.
• Further research into gut-brain axis signaling pathways may elucidate biological mechanisms underlying individual differences in NDD behavioral profiles.