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MCP-1 is highly expressed in peritoneum following midline laparotomy with peritoneal abrasion in a murine model
J A Brodsky1, F J Brody, B Endlich
1Minimally Invasive Surgery Center and Department of Immunology, the Cleveland Clinic Foundation, Cleveland, OH 44195, USA. brodyf@ccf.org
Background:
Monocyte chemoattractant protein-1 (MCP-1), a CC chemokine, is a potent attractant of monocytes both in vitro and in vivo. However, its role in the repair of peritoneal injury is not well established. This study characterizes MCP-1 expression in surgical wounds following peritoneal abrasion in a murine model.
Methods:
Twenty-five C57 BL6 female mice underwent a 2-cm midline laparotomy with mechanical abrasion of the right peritoneal wall. The mice were sacrificed at various times ranging from 0 to 7 days. Hemotoxylin and eosin stained sections and tissue extracts were made using peritoneal samples from abraded and unabraded areas in each mouse. An enzyme-linked immunosorbent assay was performed on the specimens to quantitate MCP-1 expression. Values were compared using a t-test.
Results:
At baseline, there was minimal expression of MCP-1 (<5 pg/mg protein). Following surgery, MCP-1 levels at abraded sites were significantly higher than those at both baseline and unabraded sites at all times up to a week following surgery. Histologic evaluation revealed peritoneal thickening and leukocytic infiltration of only abraded surfaces.
Conclusion:
MCP-1 is highly expressed in peritoneum following laparotomy with peritoneal abrasion. Elevations in MCP-1 levels are identified within 6 h of surgery and persist for up to 1 week. The histologic differences between abraded and unabraded areas may be attributable to differences in MCP-1 expression. Further studies using recombinant MCP-1 and anti-MCP-1 antibody may elucidate this relationship.
Insights
Monocyte chemoattractant protein-1 (MCP-1) is significantly elevated in surgical peritoneal wounds for up to a week. This chemokine may play a role in peritoneal repair following injury.
Area of Science:
- Wound healing research
- Inflammation and immunology
- Surgical pathology
Background:
- Monocyte chemoattractant protein-1 (MCP-1) is a CC chemokine that attracts monocytes.
- Its specific role in peritoneal injury repair remains unclear.
- This study investigates MCP-1 expression in murine peritoneal surgical wounds.
Purpose of the Study:
- To characterize MCP-1 expression in peritoneal tissue following surgical abrasion.
- To correlate MCP-1 levels with histological changes in wound repair.
Main Methods:
- Murine model of laparotomy with peritoneal abrasion.
- Analysis of peritoneal tissue at 0–7 days post-surgery.
- Histological examination (H&E staining) and MCP-1 quantification via ELISA.
Main Results:
- MCP-1 expression was minimal at baseline (<5 pg/mg protein).
- Significantly elevated MCP-1 levels were observed at abraded sites from 6 hours up to 7 days post-surgery.
- Abraded sites showed peritoneal thickening and leukocytic infiltration.
Conclusions:
- MCP-1 is highly expressed in the peritoneum after laparotomy and abrasion.
- Elevated MCP-1 levels persist for at least one week post-surgery.
- Differences in MCP-1 expression likely contribute to observed histological changes in wound repair.