Pc. Ridings et al., SEPSIS-INDUCED ACUTE LUNG INJURY IS ATTENUATED BY SELECTIN BLOCKADE FOLLOWING THE ONSET OF SEPSIS, Archives of surgery, 130(11), 1995, pp. 1199-1208
Objective: To determine the effect of infusion with a dual-binding ant
ibody to E- and L-selectin, EL-246, in a postonset model of sepsis. De
sign: Nonrandomized controlled study. Study Subjects: Young Yorkshire
swine. Interventions: Three groups were studied. Controls (n=8) receiv
ed saline solution only. Untreated animals with sepsis (n=8) received
a 1-hour intravenous infusion of live Pseudomonas aeruginosa. Animals
treated with EL-246 (n=6) received the same bacterial infusion and a 2
-mg/kg bolus of EL-246 at 30 minutes. Outcome Measures: Systemic and p
ulmonary hemodynamics, arterial blood gas determination, bronchoalveol
ar lavage protein and neutrophil content, neutrophil integrin and sele
ctin expression, neutrophil oxidant burst, and organ myeloperoxidase c
ontent. Results: Treatment with EL-246 significantly reduced lung inju
ry, as indicated by improved bronchoalveolar lavage protein and neutro
phil content, resulting in a significant improvement in arterial oxyge
nation. This reduction in lung injury was produced by a reduction in l
ung myeloperoxidase content. Treatment with EL-246 failed to prevent t
he development of pulmonary hypertension and systemic hypotension. Neu
trophils from animals with sepsis exhibited significant activation and
upregulation of CD18, shedding of L-selectin, and production of incre
ased levels of oxidants compared with controls. Conclusion: Treatment
of animals with EL-246 soon the onset of sepsis produced significant p
rotection against acute lung injury but failed to attenuate hemodynami
c derangements associated with sepsis.