Intestinal Homeostasis under Stress Siege

Area of Science:

• Gastroenterology
• Neuroimmunology
• Microbiology

Background:

• Intestinal homeostasis relies on gut barrier integrity, including the mucus layer and immunoglobulin A (IgA).
• Stress can disrupt this delicate balance through the brain-gut axis (BGA).
• The BGA involves nervous (enteric nervous system, sympathetic, parasympathetic) and endocrine (hypothalamic-pituitary-adrenal) systems.

Purpose of the Study:

• To review experimental animal models investigating stress's impact on intestinal homeostasis.
• To emphasize the effects of stress on intestinal mucus and IgA.
• To provide a foundation for interventions in stress-exacerbated conditions.

Main Methods:

• Review of experimental animal models.
• Focus on neuroendocrine mediators of the brain-gut axis.
• Analysis of effects on intestinal mucus and IgA.

Main Results:

• Stress significantly impacts intestinal homeostasis via the brain-gut axis.
• Alterations in mucus layer and IgA levels are key consequences.
• Animal models demonstrate specific mechanisms of stress-induced gut dysfunction.

Conclusions:

• Understanding stress's effects on the gut barrier is vital.
• Animal models offer insights into the pathophysiology of stress-related gastrointestinal disorders.
• This knowledge can inform the development of pharmacological and immunological treatments for conditions like irritable bowel syndrome.