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Successful anastomosis between tissue-engineered intestine and native small bowel
S Kaihara1, S S Kim, M Benvenuto
1Department of Surgery, Children's Hospital & Harvard Medical School, Boston, Massachusetts 02115, USA.
Transplantation
|February 12, 1999
Summary
Anastomosing tissue-engineered intestine to native small bowel in rats showed no complications and promoted cyst growth and mucosal development. This surgical connection improved the size and villus structure of the engineered intestine.
Area of Science:
- Regenerative Medicine
- Gastroenterology
- Surgical Innovation
Background:
- Previous studies demonstrated vascularized cysts from intestinal organoids on polymer scaffolds.
- These cysts were lined by a neomucosa, indicating potential for tissue engineering.
Purpose of the Study:
- To demonstrate successful anastomosis between tissue-engineered intestine and native small bowel.
- To evaluate the impact of this anastomosis on cyst growth and development.
Main Methods:
- Intestinal organoid units from Lewis rats were seeded onto polyglycolic acid tubes and implanted into omentum.
- Constructs were anastomosed to the native jejunum (group 1) or not (group 2) after 3 weeks.
- Tissue-engineered constructs were harvested after 10 weeks, with some undergoing upper GI studies.
Main Results:
- Anastomosis (group 1) showed 90% patency with no stenosis or obstruction.
- Cysts in group 1 were significantly longer and had greater villus number, height, and surface length than group 2.
- Histology confirmed neomucosal continuity and crypt-villus structures at the anastomotic site.
Conclusions:
- Anastomosis between tissue-engineered and native intestine is safe and effective, maintaining patency and mucosal continuity.
- The surgical connection positively influenced cyst size and mucosal maturation in the engineered tissue.
- This study supports the potential of tissue-engineered intestine for surgical applications.