Impulsivity as a common process across borderline personality and substance use disorders

Area of Science:

• Psychiatry
• Psychology
• Genetics

Background:

• Borderline Personality Disorder (BPD) and Substance Use Disorders (SUD) frequently co-occur, posing significant public health challenges.
• Impulsivity is a recognized heritable trait linked to the development and persistence of both BPD and SUD.
• Previous research highlights the BPD-SUD comorbidity, necessitating further investigation into shared underlying mechanisms.

Purpose of the Study:

• To re-examine the role of impulsivity as a common factor in Borderline Personality Disorder (BPD) and Substance Use Disorders (SUD).
• To explore the multidimensional aspects of impulsivity in relation to BPD and SUD.
• To investigate the interaction between impulsivity, negative affectivity, and these disorders.

Main Methods:

• Literature review and theoretical integration of existing research on impulsivity, BPD, and SUD.
• Focus on the multidimensional nature of impulsivity, including its various facets.
• Examination of the interplay between impulsivity, trait negative affectivity, and state negative affectivity.

Main Results:

• Impulsivity is a core, heritable characteristic contributing to both Borderline Personality Disorder (BPD) and Substance Use Disorders (SUD).
• The multidimensionality of impulsivity is crucial for understanding its role in these comorbid conditions.
• Negative affectivity (both trait and state) interacts with impulsivity, influencing the expression and maintenance of BPD and SUD.

Conclusions:

• Impulsivity is a critical transdiagnostic construct linking Borderline Personality Disorder (BPD) and Substance Use Disorders (SUD).
• A comprehensive understanding of impulsivity's dimensions and its interaction with negative affect is essential for effective assessment and treatment strategies.
• Further research into these specific pathways can inform novel interventions for individuals with comorbid BPD and SUD.