This document summarizes 5 references about bipolar disorder: 1. A review of research on the efficacy and safety of antidepressant use in treating depressive episodes of bipolar disorder. 2. A review and update on suicide behaviors in bipolar disorder for clinicians. 3. A review of the role of the innate immune receptor Toll-like receptor 4 signaling in neuropsychiatric diseases. 4. A systematic review of biological aspects and potential biomarkers for psychotic bipolar disorder. 5. A review on interventions for comorbid problem gambling and psychiatric disorders.