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The Kindling/Sensitization Model and Early Life Stress
1Clinical Professor of Psychiatry, George Washington University School of Medicine, Bipolar Collaborative Network, Bethesda, MD, USA. robert.postmd@gmail.com.
Current Topics in Behavioral Neurosciences
|January 12, 2021
Summary
Bipolar disorder progresses over time, with repeated stressors and episodes increasing reactivity and leading to spontaneous mood shifts. Early intervention is crucial to prevent worsening symptoms and improve treatment outcomes.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Animal models for bipolar disorder's longitudinal course are limited.
- Behavioral sensitization and seizure kindling offer insights into bipolar disorder's progressive nature.
Purpose of the Study:
- To describe sensitization and kindling-like phenomena in bipolar disorder.
- To discuss the mechanisms and clinical implications of these progressive changes.
Main Methods:
- Described aspects of bipolar illness exhibiting sensitization and kindling-like reactivity.
- Discussed underlying mechanisms and clinical treatment implications.
Main Results:
- Early life stress is a risk factor for bipolar disorder and substance abuse.
- Episodes become spontaneous over time, with increased prior episodes linked to faster recurrence, dysfunction, and cognitive impairment.
- Sensitization appears driven by epigenetic mechanisms; US patients show greater sensitization and genetic vulnerability.
Conclusions:
- Sensitization and kindling models underscore the need for early intervention to halt bipolar disorder's progression.
- Neurobiological understanding of these mechanisms can support prevention and sustained prophylactic treatment.
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