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The Role of Toll and Nonnuclear NF-κB Signaling in the Response to Alcohol

Nigel S Atkinson1

  • 1Department of Neuroscience and The Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, USA.

Cells
|June 10, 2023
PubMed

Insights

Neuroimmune signaling, particularly Toll-like receptor (TLR) pathways in the central nervous system (CNS), is crucial for understanding alcohol addiction and damage in alcohol use disorder (AUD). Drosophila studies reveal novel roles for TLRs in shaping alcohol responsivity and behavior.

Area of Science:

  • Neuroimmunology
  • Neurobiology of Alcohol Use Disorder
  • Molecular Signaling Pathways

Background:

  • Neuroimmune signaling is increasingly recognized as central to alcohol addiction and the neurological damage associated with alcohol use disorder (AUD).
  • The neuroimmune system modulates neural activity through alterations in gene expression.

Purpose of the Study:

  • To review the role of central nervous system (CNS) Toll-like receptor (TLR) signaling in the context of alcohol exposure and AUD.
  • To explore novel functions of TLR signaling pathways in the nervous system, particularly in shaping behavior.

Main Methods:

  • Review of existing literature on neuroimmune signaling and alcohol's effects.
  • Analysis of observations in Drosophila melanogaster regarding TLR signaling and alcohol responsivity.

Main Results:

  • CNS Toll-like receptor (TLR) signaling plays a significant role in the neurobiological response to alcohol.
  • In Drosophila, TLR signaling pathways can be integrated by the nervous system to influence behavior in previously unrecognized ways.
  • Drosophila studies demonstrate that TLRs can function analogously to neurotrophin receptors, and NF-κB activation downstream of TLRs can non-genomically affect alcohol responsivity.

Conclusions:

  • Toll-like receptor (TLR) signaling is a critical component of the neuroimmune response to alcohol, impacting addiction and AUD.
  • The nervous system's co-option of TLR pathways, as seen in Drosophila, highlights their broader and potentially non-genomic influence on behavior and alcohol sensitivity.
Keywords:
DrosophilaNF-κBTolladdictionalcoholinnate immune systemneuroimmune

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