Body weight changes and bipolar disorder: a molecular pathway analysis.

Area of Science:

• Genetics
• Psychiatry
• Metabolic Disorders

Background:

• Bipolar disorder (BD) is associated with weight-related disorders, influenced by psychological, social, and treatment factors.
• Weight changes in BD impact treatment adherence, quality of life, prognosis, and mortality risk from comorbidities like diabetes and cardiovascular disease.

Purpose of the Study:

• To identify molecular pathways distinguishing individuals with BD who experience weight changes during treatment from those who do not.
• To explore potential biomarkers for predicting and managing weight fluctuations in bipolar disorder.

Main Methods:

• A hypothesis-free molecular pathway analysis was conducted on the STEP-BD sample (n=618).
• Genetic data underwent cluster analysis to control for stratification.
• Clinical covariates including socioeconomic and treatment variables were incorporated.

Main Results:

• No Genome-Wide Association Study significant findings were identified.
• Six molecular pathways were significantly associated with weight change within the first three months of BD treatment.
• Key pathways identified include CDC42 and Rac Family Small GTPase 1, implicated in insulin regulation and diabetes pathophysiology.

Conclusions:

• Molecular pathways central to energy homeostasis may differentiate individuals with BD who experience weight changes during treatment.
• Findings could guide the development of targeted preventive strategies and personalized treatments to enhance BD management and efficacy.