Crypt fission contributes to postnatal epithelial growth of the small intestine in pigs
Publikation/Tidskrift/Serie: Livestock Science
Studies on growth of the small intestine have mostly concentrated on crypt hyperplasia rather than crypt fission (CF). The process of crypt bifurcation has been identified in rodents and humans but not in swine. The main aims of this study were: 1) to investigate quantitatively crypt fission in the small intestine mucosa of pigs of different age-groups and 2) to assess the effect of colostrum and milk on small intestine growth via CF. Five groups of piglets were studied: non-suckling piglets, euthanized just after delivery (C0) suckling piglets, euthanized 24 h after delivery (C1) and then piglets that were euthanized at 7.28 and 180 days of life (C7, C28, C180 respectively). Samples of duodenum, jejunum (proximal, middle and distal) and ileum were taken for the evaluation of the percentage of bifid crypts. Our results show that the 24 h suckling period has no effect on the percentage of bifid crypts compared to the non-suckling, newborn piglets (C0). Moreover, we observed that the rate of bifid crypts depends predominantly on the age of the piglets and the part of intestine examined and less on the feed components. The highest CF is observed during the first 28 days of life and then declines significantly at day 180. In duodenum and proximal jejunum there were no significant changes between groups of piglets in age till 28 days of life whereas in further parts we observed a decrease of bifid crypts comparing C0 and C1 with C7. In conclusion, our data shows that CF contributes to epithelial growth of the small intestine in piglets. The peak of bifid crypts was observed during suckling, thus CF can be described as a marker for intestinal growth during the early postnatal period. (C) 2010 Elsevier B.V. All rights reserved.
- Crypt fission
- Small intestine
11th International Symposium on Digestive Physiology of Pigs
- ISSN: 1871-1413