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Updated: Jan 25, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Forebrain Cholinergic Signaling Regulates Innate Immune Responses and Inflammation.

Kurt R Lehner1, Harold A Silverman1,2, Meghan E Addorisio2

  • 1Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, United States.

Frontiers in Immunology
|April 27, 2019
PubMed
Summary

Forebrain cholinergic neurons control peripheral inflammation by regulating tumor necrosis factor (TNF). Targeting these pathways may offer new treatments for inflammatory diseases like sepsis and Alzheimer's disease.

Keywords:
cytokinesendotoxemiaforebrain cholinergicinflammationneural regulationsepsisvagus nerve

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Area of Science:

  • Neuroscience
  • Immunology
  • Pharmacology

Background:

  • The brain's regulation of peripheral immune function is not fully understood.
  • Neuromediator systems and pathways linking the brain to immunity require further investigation.
  • Cholinergic signaling is a potential pathway for brain-immune communication.

Purpose of the Study:

  • To investigate the role of forebrain cholinergic signaling in regulating peripheral immune function and inflammation.
  • To identify specific neuromediator systems and pathways involved in this regulation.

Main Methods:

  • Utilized selective genetic and pharmacological approaches in murine models.
  • Investigated forebrain-selective genetic ablation of acetylcholine release and vagotomy.
  • Examined the effects of stimulating M1 muscarinic acetylcholine receptors (M1 mAChR) using benzyl quinolone carboxylic acid (BQCA).
  • Employed optogenetic stimulation of basal forebrain cholinergic neurons.
  • Assessed serum TNF levels and survival rates in endotoxemic mice.
  • Utilized M1 mAChR knockout (KO) mice for mechanistic studies.

Main Results:

  • Forebrain cholinergic signaling suppression abolished galantamine's anti-inflammatory effect.
  • Stimulation of M1 mAChR by BQCA suppressed serum TNF levels and improved survival in endotoxemia.
  • These effects were dependent on M1 mAChR and abolished in KO mice.
  • Optogenetic stimulation of basal forebrain cholinergic neurons reduced TNF in endotoxemic mice.

Conclusions:

  • Forebrain cholinergic neurons play a critical role in regulating innate immune responses and inflammation.
  • Targeting forebrain cholinergic signaling, particularly M1 mAChR, presents a novel therapeutic strategy for inflammatory disorders.
  • Cholinergic dysfunction in diseases like Alzheimer's may impair anti-inflammatory regulation, highlighting potential therapeutic avenues.