ROLE OF CD11A AND CD11B IN ISCHEMIC ACUTE-RENAL-FAILURE IN RATS

Leukocytes, particularly neutrophils, have been implicated in ischemic -reperfusion organ injury (IRI). However,. their role in kidney IRI is controversial. Leukocytes express the adhesion molecules CD11/CD18 on their surface, which mediate many functions that can lead to tissue d amage. To determine the role of CD11a and CD11b in IRI in the kidney, uninephrectomized Sprague-Dawley rats were pretreated with monoclonal antibodies (MAbs) directed against CD11a and CD11b or control MAbs. Th e serum creatinine (SCr), complete blood count, and kidney histopathol ogical damage scores (PDS) (scale: 0-4) were assessed prior to and 24 h after 60 min of ischemia. Mean SCr 24 h after ischemia was significa ntly decreased in the anti-CD11a- and -CD11b-treated group compared wi th the control MAb-treated group (2.5 +/- 0.3 mg/dl vs. 3.4 +/- 0.2 mg /dl, P < 0.05). PDS were also reduced in the CD11a and CD11b group com pared with controls (2.7 +/- 0.2 vs. 3.5 +/- 0.1, P < 0.001). These da ta show that the CD11/CD18 leukocyte adhesion pathway plays a role in mediating ischemic acute renal failure in rats.