Potential Candidates for Biomarkers in Bipolar Disorder: A Proteomic Approach through Systems Biology

Area of Science:

• Proteomics
• Neuroscience
• Biochemistry

Background:

• Bipolar disorder (BD) is a severe mental health condition causing significant disability, cognitive impairment, and high suicide rates.
• Current diagnosis relies solely on clinical symptoms, which are often non-specific, leading to underdiagnosis and misdiagnosis.
• Identifying objective biomarkers is crucial for accurate diagnosis and effective treatment strategies.

Purpose of the Study:

• To review and analyze proteomic data from blood samples of individuals with BD and healthy controls.
• To identify dysfunctional molecular pathways associated with the pathophysiology of bipolar disorder.
• To explore potential protein biomarkers for improved diagnostic and prognostic capabilities.

Main Methods:

• A systematic literature search was conducted in PubMed for original articles on proteomic analysis in BD.
• Seven relevant studies were selected, and data were extracted for network analysis.
• Protein-protein interaction networks were constructed using STRING, and pathway analysis was performed with ClueGO and R package pathview.

Main Results:

• Proteomic analysis revealed proteins involved in diverse biological processes, including growth, endocrine regulation, iron transport, protease inhibition, pathogen defense, and cholesterol transport.
• Pathway analysis highlighted the involvement of identified proteins in the complement system and coagulation cascade.
• These findings suggest specific metabolic pathways are dysregulated in bipolar disorder.

Conclusions:

• The study identifies the complement system and coagulation cascade as key pathways potentially involved in bipolar disorder pathophysiology.
• The identified proteins represent potential biomarker candidates for enhancing the diagnosis and prognosis of BD.
• Further research into these molecular pathways could lead to the development of novel pharmacological treatments for bipolar disorder.