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Laparotomy and laparoscopy diversely affect macrophage-associated antimicrobial activity in a murine model.

BMC immunology (2013-06-22)
Shun Gen Huang, Yi Ping Li, Qi Zhang, H Paul Redmond, Jiang Huai Wang, Jian Wang
ABSTRACT

Surgical intervention-related trauma contributes largely to the development of postoperative immunosuppression, with reduced resistance to secondary bacterial infection. This study compared the impact of laparotomy versus laparoscopy on macrophage-associated bactericidal ability and examined whether laparotomy renders the host more susceptible to microbial infection. BALB/c mice were randomized into control, laparotomy, and laparoscopy groups. Laparotomy, but not laparoscopy, significantly downregulated CR3 expression on macrophages, diminished macrophage-induced uptake and phagocytosis of E. coli and S. aureus, and impaired macrophage-mediated intracellular bacterial killing. Consistent with this, mice that underwent laparotomy displayed substantially higher bacterial counts in the blood and visceral organs as well as a significantly enhanced mortality rate following bacterial infection, whereas mice subjected to laparoscopy did not show any defects in their bacterial clearance. Laparotomy has an adverse effect on host innate immunity against microbial infection by impairing macrophage-mediated phagocytosis and killing of the invaded bacteria. By contrast, laparoscopy appears to preserve macrophage-associated bactericidal ability, thus alleviating the development of postoperative immunosuppression.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
LB Broth with agar (Lennox), Highly-referenced microbial growth powder medium with Agar, low salt, suitable for salt-sensitive E. coli culture.
Sigma-Aldrich
LB Broth with agar (Lennox), Tablet microbial growth medium
Sigma-Aldrich
DAF-FM, ≥98% (HPLC)

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