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Bowler, R.P. et al.

Bowler, Arcaroli, Abraham, Patel, Chang, Crapo,

Evidence for extracellular superoxide dismutase as a mediator of hemorrhage-induced lung injury.

Hemorrhage results in excessive production of superoxide that is associated with severe lung injury. We examined whether the superoxide dismutase (SOD) mimetic manganese(III) mesotetrakis (di-N-ethylimidazole) porphyrin (AEOL 10150) could attenuate this lung injury and whether extracellular (EC)-SOD-deficient mice would have increased hemorrhage-induced lung injury. Compared with wild-type mice, EC-SOD-deficient mice had increased lung neutrophil accumulation, a 3.9-fold increase in myeloperoxidase activity, a 1.5-fold increase in nuclear factor (NF)-kappaB activation, and a 1.5-fold increase in lipid peroxidation 1 h after hemorrhage. Pretreatment with AEOL 10150 did not attenuate neutrophil accumulation but significantly reduced NF-kappaB activation and lipid peroxidation in both wild-type and EC-SOD-deficient mice. The increase in hemorrhage-induced neutrophil accumulation in the lungs of EC-SOD-deficient mice suggests that EC-SOD might play a role in mediating neutrophil recruitment to the lung.[1]

References

Evidence for extracellular superoxide dismutase as a mediator of hemorrhage-induced lung injury. Bowler, R.P., Arcaroli, J., Abraham, E., Patel, M., Chang, L.Y., Crapo, J.D. Am. J. Physiol. Lung Cell Mol. Physiol. (2003) [Pubmed]

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