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. 2001 Oct;10(5):237–243. doi: 10.1080/09629350120093704

Analysis of local and systemic inflammatory responses induced by polymicrobial peritonitis in mice.

T S Fröde 1, S I Ferreira 1, Y S Medeiros 1
PMCID: PMC1781716  PMID: 11759107

Abstract

BACKGROUND: Abdominal sepsis induces a local production of proinflammatory mediators that may trigger both septic shock and organ-system dysfunction. AIMS: The present study analyzed exudation, cell migration, and CD11a and CD18 subset cells of both local and systemic responses induced by fecal peritonitis in mice. METHODS: Animals were anesthetized and, after performing a midline incision in the abdomen, the cecum was ligated and punctured twice with a needle. Sham-operated animals were included. Some groups were previously treated with Evans blue dye (intravenously) to further evaluate the amount of tissue and abdominal cavity leakages. RESULTS: Fecal peritonitis triggered a local inflammatory reaction with an increased number of leukocytes and exudation between 6 and 48 h (p < 0.01). Although CD11a/CD18-positive cells in the abdomen peaked after 24h, a significant decrease of them was detected after 48 h (p < 0.05). At the studied period of time (6-48 h), different degrees of exudation in several organs occurred, whereas a significant late recruitment (24 h) of CD11a/CD18 cells into the lungs was observed. CONCLUSIONS: In this model, cell migration and exudation at the site of injury occurred in parallel. However, in the lungs, the recruitment of leukocytes that express CD11a/CD18 adhesion molecules constitutes a non-dependent event in relation to fluid leakage accumulation at this site.

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