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Orthotopic Small Bowel Transplantation in Rats
Published on: November 6, 2012
Intestinal lengthening in rats after massive small intestinal resection
Shant Shekherdimian1, Andrew Scott, Andrea Chan
1Department of Surgery, Division of Pediatric Surgery, Department of Bioengineering, Interdepartmental Program in Biomedical Engineering, University of California, Los Angeles, CA 90095, USA.
Surgery
|July 25, 2009
Summary
Mechanical small bowel lengthening successfully increased intestinal length in rats after resection. This technique shows promise for treating short bowel syndrome by enhancing alkaline phosphatase activity and preserving lactase activity.
Area of Science:
- Gastroenterology
- Surgical Innovation
- Regenerative Medicine
Background:
- Previous research confirmed mechanical expanders can lengthen healthy small intestine.
- This study investigates mechanical lengthening feasibility in resected small intestine.
Purpose of the Study:
- To assess the efficacy of mechanical intestinal lengthening in a rat model with extensive small intestinal resection.
- To evaluate the impact of mechanical lengthening on intestinal segment length and biochemical markers.
Main Methods:
- Female rats underwent significant small intestinal resection.
- A mechanical expander device was implanted, with some animals receiving gradual mechanical lengthening over 3 weeks.
- Intestinal segments were analyzed post-intervention.
Main Results:
- Mechanically lengthened segments more than doubled in length compared to non-lengthened segments.
- Total alkaline phosphatase activity significantly increased in lengthened segments (4.9 vs 2.4 mumol/min).
- Total lactase activity was preserved, and smooth muscle thickness increased in lengthened segments (530 vs 370 mum).
Conclusions:
- Mechanical small bowel lengthening is achievable in resected intestinal segments.
- The technique increases intestinal length, enhances alkaline phosphatase activity, and preserves lactase activity.
- Mechanical lengthening presents a potential therapeutic strategy for short bowel syndrome.
