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Updated: Aug 12, 2026
Murine Model of Intestinal Ischemia-reperfusion Injury
Published on: May 11, 2016
Mucosa cell regeneration following intestinal ischemia/reperfusion injury in rats
1Department of Pediatric Surgery, Children's Hospital, Shanghai Medical University, China.
Insights
Intestinal regeneration after ischemia/reperfusion injury in rats begins early. Bromodeoxyuridine (BrdU) labeling is a fast method to measure cell proliferation during this process.
Area of Science:
- Gastroenterology
- Regenerative Medicine
- Cell Biology
Background:
- Intestinal ischemia/reperfusion (I/R) injury can cause significant damage to the gastrointestinal tract.
- Understanding the mechanisms of mucosal healing and regeneration is crucial for developing therapeutic strategies.
Purpose of the Study:
- To evaluate the regeneration and proliferation of intestinal mucosa cells after I/R injury in a rat model.
- To assess the utility of the immunohistochemical BrdU method for quantifying cellular DNA synthesis during regeneration.
Main Methods:
- Intestinal I/R injury was induced in 60 rats.
- Immunohistochemical analysis using Bromodeoxyuridine (BrdU) labeling and flow cytometry were employed to assess cell proliferation.
- Samples were analyzed at various time points post-reperfusion (2 hours, 2 days, 4 days).
Main Results:
- Severe villous damage was observed at 2 hours of reperfusion, with significantly reduced cell proliferation (P < 0.01).
- By 2 days of regeneration, mucosa healing and re-epithelialization were evident, though villi were sparse and small.
- Cell proliferation rates were significantly elevated after two and four days of regeneration compared to controls (P < 0.01).
Conclusions:
- Intestinal regeneration following I/R injury in rats initiates early.
- The BrdU-labeled immunohistochemical technique provides a rapid and effective method for quantifying cellular DNA synthesis rates during intestinal regeneration.
Objective:
To evaluate regeneration and proliferation of the mucosa cells following intestinal ischemia/reperfusion (I/R) injury.
Methods:
Sixty rats (200-250 g) were examined after intestinal I/R injury with immunohistochemical (BrdU) method and flow cytometric analysis.
Results:
Severe damage to the villi was evident at 2 hours reperfusion and the rate of cell proliferation was lower (P < 0.01). All the specimens has healed mucosa with re-epithelialized villi tips after 2 days regeneration, but the villi were scarce and tiny. After two and four days regeneration, the rate of cell proliferation was significantly higher than that of controls (P < 0.01).
Conclusions:
Our study suggests that the intestinal regeneration following I/R injury in rats occurs early. The immunohistochemical method with BrdU-labeled technique is a rapid method for quantifying the rate of cellular DNA synthesis.
