Age-Dependent Intestinal Repair: Implications for Foals with Severe Colic

Area of Science:

• Veterinary Medicine
• Gastroenterology
• Equine Health

Background:

• Colic is a major cause of death in horses, particularly strangulating obstruction, which compromises the intestinal barrier.
• Rapid intestinal barrier repair post-surgery is crucial for survival, preventing bacterial translocation.
• Younger horses (neonates) exhibit poorer clinical outcomes compared to older horses, suggesting age-dependent factors influence recovery.

Purpose of the Study:

• To review the roles of the gut microbiome, nutrition, stress, and the enteric nervous system (ENS) in equine intestinal repair.
• To understand how these factors influence the maturation of intestinal repair mechanisms in foals.
• To explore how these developmental processes may explain age-dependent outcomes in equine colic.

Main Methods:

• Literature review synthesizing current knowledge on equine intestinal repair.
• Analysis of the interplay between microbial colonization, diet, stress, and the ENS in neonatal development.
• Examination of age-related disparities in colic survival and their potential underlying mechanisms.

Main Results:

• The enteric glial cell network, crucial for intestinal repair, develops postnatally and is influenced by gut microbial colonization.
• Dietary changes and gut bacteria composition significantly modulate the development of the enteric nervous system (ENS) in early life.
• Immature repair mechanisms in neonates, potentially linked to ENS development, may contribute to poorer colic outcomes.

Conclusions:

• The maturation of intestinal repair in foals is a complex process influenced by the gut microbiome, nutrition, and the developing ENS.
• Understanding these factors is key to addressing age-related differences in colic outcomes.
• Targeting these pathways could improve survival rates in young horses suffering from colic.