A basic solution to activate the cholinergic anti-inflammatory pathway via the mesothelium?

Area of Science:

• Neuroimmunology
• Gastroenterology
• Physiology

Background:

• Vagal nerve stimulation reduces inflammation systemically via the cholinergic anti-inflammatory pathway.
• The spleen is central to this pathway, but lacks direct vagal innervation, creating a physiological puzzle.
• Existing models struggle to explain how the spleen is activated by the vagal nerve.

Purpose of the Study:

• To review current models of the cholinergic anti-inflammatory pathway.
• To present new findings on sodium bicarbonate's role in stimulating splenic anti-inflammatory responses.
• To propose an alternative model for the cholinergic anti-inflammatory pathway.

Main Methods:

• Literature review of proposed cholinergic anti-inflammatory pathway models.
• Analysis of recent experimental data on oral sodium bicarbonate and splenic response.
• Development of a novel mechanistic hypothesis for pathway activation.

Main Results:

• Oral sodium bicarbonate stimulates splenic anti-inflammatory pathways.
• Signal transmission to the spleen may involve the mesothelium.
• A new model is proposed that reconciles existing data with novel findings.

Conclusions:

• The cholinergic anti-inflammatory pathway's mechanism requires re-evaluation.
• Sodium bicarbonate offers a potential therapeutic strategy for inflammatory conditions.
• Further research is critical to elucidate pathway specifics and therapeutic applications.