Related Experiment Videos
Intestinal adaptation after massive proximal small-bowel resection in the pig
J Lauronen1, M P Pakarinen, P Kuusanmäki
1Haartman Institute, Dept. of Pathology, University of Helsinki, Finland.
Scandinavian Journal of Gastroenterology
|March 28, 1998
Summary
Porcine small intestine resection leads to significant enlargement and increased villi size. Adaptation involves high crypt cell proliferation, crucial for recovery after major small bowel resection.
Area of Science:
- Gastroenterology
- Surgical Research
- Animal Models
Background:
- Small-intestinal adaptation is crucial for recovery after resection.
- Previous studies primarily used rat models.
- Porcine models offer a more relevant comparison for human physiology.
Purpose of the Study:
- To investigate small intestinal adaptation in pigs after 75% proximal resection.
- To analyze morphological changes, crypt cell proliferation, and disaccharidase activity.
- To compare adaptation post-resection versus transection.
Main Methods:
- Studied porcine jejunum, ileum, and colon morphology, proliferation (Ki-67), and disaccharidase activity.
- Collected specimens preoperatively and 14 weeks post-surgery (transection or resection).
- Utilized immunohistochemistry and Dahlqvist's method for analysis.
Main Results:
- Resection caused macroscopic enlargement and increased villi and crypts in remaining small bowel.
- Crypt cell proliferation remained at preoperative levels post-resection, unlike in transection.
- Specific maltase and sucrase activities decreased in the mid-ileum after resection.
Conclusions:
- Porcine small-intestinal adaptation includes macroscopic enlargement and increased villus size.
- High crypt cell proliferation is a key feature of adaptation post-resection.
- Findings provide insights into the physiological response to major intestinal resection.