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Inflexible ethanol intake: A putative link with the Lrrk2 pathway
Daniel Almeida da Silva E Silva1, Andrea Frozino Ribeiro2, Samara Damasceno1
1Departmento de Biologia Geral, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil.
Behavioural Brain Research
|July 15, 2016
Summary
This study reveals that the Lrrk2 gene is upregulated in mice exhibiting compulsive alcohol drinking, suggesting its critical role in alcohol addiction. This finding offers new insights into the genetic underpinnings of excessive ethanol consumption.
Area of Science:
- Neuroscience
- Genetics
- Addiction Research
Background:
- Alcoholism is a complex disorder influenced by genetics and ethanol intake.
- Striatal gene expression changes are linked to excessive drug consumption and relapse.
- Understanding these changes is crucial for addiction research.
Purpose of the Study:
- To investigate striatal transcript regulation in a murine model of varying ethanol intake.
- To correlate specific ethanol consumption patterns with gene expression in the striatum.
- To identify genetic pathways involved in compulsive alcohol consumption.
Main Methods:
- Utilized a chronic three-bottle free-choice murine model.
- Categorized mice into Light, Heavy, and Inflexible Drinkers based on ethanol preference.
- Analyzed striatal gene expression changes in relation to intake patterns.
Main Results:
- Identified distinct striatal transcript regulation patterns across different drinking groups.
- Found significant upregulation of the Lrrk2 gene exclusively in Inflexible Drinkers.
- Lrrk2 encodes a multifunctional protein with kinase and GTPase activities.
Conclusions:
- The Lrrk2 pathway is implicated in compulsive ethanol intake behavior.
- This study provides the first evidence linking Lrrk2 to the compulsive nature of alcohol addiction.
- Findings suggest Lrrk2 as a potential target for understanding and treating alcohol use disorder.
