Developmental Pathways From Genetic Predispositions to Psychopathology in Adolescence

Area of Science:

• Developmental Psychology
• Psychiatric Genetics
• Child and Adolescent Psychiatry

Background:

• Psychopathologies frequently co-occur, indicating shared genetic and environmental influences.
• Understanding these links is crucial for identifying at-risk youth and developing targeted interventions.

Purpose of the Study:

• To investigate the mediated associations between genetic predispositions for higher-order psychopathology and symptom development from childhood to adolescence.
• To examine the role of early childhood psychopathology symptoms as mediators in this developmental pathway.

Main Methods:

• Utilized two large longitudinal birth cohorts (Generation R Study and ALSPAC).
• Calculated polygenic scores (PGS) for externalizing, internalizing, and neurodevelopmental psychopathology.
• Employed growth curve modeling and mediation analyses to assess developmental trajectories and mediated effects from age 6 to 14.

Main Results:

• The polygenic score for neurodevelopmental problems significantly predicted both baseline levels and developmental slopes of psychopathological symptoms.
• These effects were often mediated by higher levels of psychopathology symptoms present at baseline (age 6).

Conclusions:

• The polygenic score for neurodevelopmental problems shows promise as a broad indicator of susceptibility to psychopathology in the general youth population.
• These findings highlight the importance of early childhood symptomology in the developmental pathway from genetic predisposition to adolescent psychopathology.