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A Complex Relationship Among the Circadian Rhythm, Reward Circuit and Substance Use Disorder (SUD)
Saptadip Samanta1, Debasis Bagchi2,3, Mark S Gold4
1Department of Physiology, Midnapore College, Midnapore, West Bengal, 721101, India.
Psychology Research and Behavior Management
|October 16, 2024
Summary
Chronodisruption, including shift work and jet lag, worsens addiction by disrupting brain reward circuits. Chronotherapy may offer new treatment strategies for substance use disorder (SUD).
Area of Science:
- Neuroscience
- Chronobiology
- Addiction Research
Background:
- The human brain regulates physiological functions, circadian rhythms, and behaviors.
- Environmental factors like stress and social issues contribute to addiction.
- Circadian rhythm dysfunction, caused by shift work or jet lag, impairs brain function and can advance substance use disorder (SUD).
Purpose of the Study:
- To explore the intricate relationship between circadian rhythm dysfunction, the brain's reward circuits, and SUD.
- To discuss the potential therapeutic benefits of chronotherapy in managing SUD.
Main Methods:
- This study is a review, synthesizing existing research on chronobiology and addiction.
- It examines the impact of circadian rhythm disruption on neurobiological pathways involved in reward and addiction.
- The review analyzes the role of chronotherapy in SUD treatment strategies.
Main Results:
- There is a significant bidirectional relationship between circadian rhythm disruption and addiction.
- Dysfunctional circadian rhythms, neuroadaptations in reward pathways, and altered clock gene expression in mesolimbic areas are linked to SUD.
- Chronotherapy shows promise as an adjunctive treatment for SUD.
Conclusions:
- Circadian rhythm dysfunction is a key factor contributing to the development and progression of SUD.
- Understanding the interplay between circadian rhythms and reward circuits is crucial for effective SUD treatment.
- Chronotherapy presents a novel therapeutic avenue for individuals with substance use disorder.
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