Age-related characteristics of gastric squamous epithelial mucosa in foals.

The research article investigates the changes in the gastric squamous epithelial mucosa in foals at different stages of development, from fetuses to 35-day-old foals. The findings suggest that the gastric epithelium changes significantly during gestation and continues to develop post-birth, including an increase in epithelial cell layers, thickening of keratinised layers, and increased prominence of papillae.

Objective of the Research

• The study aimed at investigating how the gastric squamous epithelial mucosa develops in foals with age. This is a crucial aspect of understanding the overall gastric output and functions in the foals as they grow.

Study Design and Sample Population

• A sample population was obtained that included 7 fetuses, 10 term foals, and 12 foals aged between 2 to 35 days.
• The gastric stratified squamous epithelial mucosa used in the study were sourced from the right side adjacent to the margo plicatus and along the greater curvature.

Methods and Observations

• The epithelial mucosa of the foetuses was studied at various stages of gestation: 150-270 days, 300 days, and 335 days.
• At 150-270 days, the epithelium was noted to be 8-10 cells thick with a single basal cell layer. The epithelial cells were polyhedral with abundant clear or slightly stained cytoplasm.
• Changes were observed in 300-day fetuses where the basal layer was thicker and a flattened, single-cell layer appeared. Similarly, in the 335-day fetus, the epithelial cells were flat with a keratinised cellular layer that was 1-2 cells thick.
• In term foals, the gastric epithelium had 10-12 cell layers, with 4-5 thin layers of keratinised surface. The study recorded either an absence or lack of prominence of epithelial projections (papillae).
• The study also noted the desquamation, that is, shedding of the keratinised layers in foals aged 2 days and above.

Conclusions

• The gastric epithelium consistently evolved with the age of the foals, with a noted thickening and increased layers of cells.
• There was also a noted thickening of the keratinised layers and progression in the prominence of papillae.
• This research provides significant insight into the development and changes in the gastric squamous epithelial mucosa in foals, which can be vital for their health management.