Related Experiment Video
Updated: May 12, 2026
04:42
Developing a Rat Model for Bipolar Disorder
Published on: May 2, 2025
[Early onset bipolar disorder: validation from admixture analyses and biomarkers]
Pierre Alexis Geoffroy1, Bruno Etain, Stéphane Jamain
1Hôpital H. Mondor-A. Chenevier, Pôle de psychiatrie, et Fondation Fonda Mental, Créteil, France.
Summary
Early onset bipolar disorder (BD) presents unique severe characteristics, impacting diagnosis and treatment. Age at onset is a crucial specifier for future classifications and targeted interventions.
Area of Science:
- Psychiatry
- Genetics
- Neuroscience
Context:
- Bipolar disorder (BD) exhibits clinical heterogeneity, particularly concerning age at onset (AAO).
- AAO is a potential specifier for future diagnostic classifications.
- Early onset BD (EOBD) presents distinct clinical and biological features.
Purpose:
- To review evidence on admixture analyses and biomarkers in early onset BD.
- To support the inclusion of AAO as a diagnostic specifier in BD.
- To highlight the clinical significance of EOBD.
Summary:
- Admixture studies identify three BD subgroups based on AAO (early, intermediate, late), with cut-offs at 21 and 35 years.
- EOBD is characterized by higher rates of suicide attempts, rapid cycling, substance misuse, psychosis, and anxiety disorders.
- Genetic, biological, imaging, and cognitive markers support the validity of the EOBD subgroup.
Impact:
- Clinician awareness is crucial for early detection and management of EOBD.
- EOBD affects 44.80% of BD cases, necessitating specific diagnostic and treatment approaches.
- Including AAO as a specifier in DSM-5 can improve BD course and outcome prediction.
Related Concept Videos
01:30Bipolar Disorder
Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
01:29Biological Causes of Schizophrenia
Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin studies.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin studies.
01:28Human Genetics
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
01:25Borderline Personality Disorder
Borderline Personality Disorder is a complex and multifaceted mental health condition characterized by pervasive instability in interpersonal relationships, self-image, emotions, and impulse control. This instability manifests in extreme emotional reactions, fear of abandonment, and self-destructive behaviors. The disorder significantly impacts daily functioning, often leading to distress in both personal and professional domains.
Genetic and Environmental Contributions
Borderline Personality...
Genetic and Environmental Contributions
Borderline Personality...
01:27Depressive Disorders: Etiology
Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
01:30Attention-Deficit/Hyperactivity Disorder
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.