Related Experiment Videos
Enterocyte apoptosis is increased following small bowel resection
M A Helmrath1, C R Erwin, C E Shin
1Division of Pediatric Surgery, Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cininnati, Ohio, USA.
Summary
Small bowel resection (SBR) increases both enterocyte proliferation and apoptosis during intestinal adaptation. Understanding these changes is crucial for developing therapies to improve gut healing after SBR.
Area of Science:
- Gastroenterology
- Cell Biology
- Surgical Research
Background:
- Intestinal mucosa maintains a balance between cellular proliferation and death.
- Small bowel resection (SBR) is known to increase intestinal cell proliferation.
- The impact of SBR on enterocyte apoptosis remains largely unknown.
Purpose of the Study:
- To investigate the effect of intestinal adaptation following small bowel resection (SBR) on enterocyte apoptosis rates.
- To quantify changes in both proliferation and apoptosis in the ileum post-SBR.
Main Methods:
- Male ICR mice underwent either 50% proximal SBR or a sham operation.
- Enterocyte proliferation was measured using bromodeoxyuridine incorporation in crypt cells.
- Apoptosis was quantified via DNA strand break end labeling and propidium iodide staining.
Main Results:
- SBR significantly increased enterocyte proliferation by 30-40% compared to sham-operated controls.
- Apoptosis rates also significantly increased by 57-87% at all measured time points post-SBR.
- Both proliferation and apoptosis were elevated at 12 and 24 hours, and 3 and 7 days after SBR.
Conclusions:
- Intestinal adaptation following SBR enhances both enterocyte proliferation and apoptosis.
- A comprehensive understanding of these dual processes is essential for developing therapeutic strategies.
- Future research should fully characterize the effects of interventions on both proliferation and apoptosis in SBR models.