From Natural Behavior to Drug Screening: Invertebrates as Models to Study Mechanisms Associated with Alcohol Use...

Area of Science:

• Neuroscience and Molecular Biology
• Behavioral Science
• Genetics and Genomics

Background:

• Alcohol use disorders (AUDs) arise from complex changes in brain function.
• The molecular basis for the transition from normal ethanol consumption to addiction remains unclear.
• Invertebrate models offer conserved mechanisms for studying ethanol's effects on behavior and neuronal adaptation.

Purpose of the Study:

• To review current knowledge on behavioral and cellular responses to ethanol.
• To explore molecular mechanisms of neuronal adaptation to ethanol as a cellular stressor.
• To highlight conserved pathways and potential drug targets for ethanol-induced behaviors.

Main Methods:

• Literature review focusing on recent advances (last 5 years) in invertebrate models.
• Analysis of studies on Drosophila melanogaster, Caenorhabditis elegans, and Apis mellifera.
• Examination of behavioral, cellular, and molecular responses to ethanol exposure.

Main Results:

• Low ethanol levels can trigger beneficial compensatory mechanisms and alter learning/memory-related brain structures.
• Ethanol's odor elicits behavioral and molecular responses; minimal networks regulate consumption.
• Heat shock and oxidative stress pathways are involved in ethanol adaptation, challenged by additional stressors.

Conclusions:

• Invertebrate models are crucial for uncovering fundamental principles of neuronal adaptation to ethanol.
• Conserved molecular mechanisms, including cellular stress responses, underlie ethanol-induced behaviors across species.
• Drug targets for AUDs can be identified by studying these conserved pathways in invertebrates.