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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Prevention of pulmonary injury in isolated perfused rat lungs by activated human neutrophils preincubated with anti-Mo1 monoclonal antibody.

Neutrophil activation results in neutrophil adherence and may subsequently cause lung injury through the generation of oxidants, release of granule proteases, and generation of a variety of mediator substances. We hypothesized that inhibition of neutrophil adherence and subsequent lung sequestration would attenuate the lung injury caused by activated neutrophils. Using isolated perfused rat lungs, we determined if anti-Mo1 monoclonal antibody (binds to the alpha subunit of a neutrophil glycoprotein [gp 155.94] that facilitates adherence) would attenuate lung neutrophil sequestration and lung injury caused by human neutrophils stimulated by phorbol myristate acetate (PMA). PMA-stimulated neutrophils but not PMA or neutrophils alone caused lung injury as assessed by accumulation of 125I-bovine serum albumin into lung parenchyma and alveolar lavage fluid. Incubation of neutrophils with anti-Mo1 antibody prior to stimulation with PMA attenuated lung injury and neutrophil sequestration. Furthermore, a histological survey revealed that anti-Mo1 antibody inhibited neutrophils present in the lung from spreading following exposure to PMA. Anti-Mo1 antibody did not inhibit PMA-stimulated neutrophil release of granule constituents or toxic O2 metabolites as evidenced by lysozyme and lactoferrin release or the reduction of ferricytochrome c in the lung perfusate. The inhibition of lung injury caused by the anti-Mo1 antibody was not likely due to a nonspecific effect of the antibody, since another murine monoclonal antibody of the same class (anti-Mo5) did not inhibit lung neutrophil sequestration or lung injury. Thus, in this experimental model, interference with the close approximation of the neutrophil to its target site inhibited the ability of the activated human neutrophil to cause injury.[1]


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