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Heme oxygenase inhibition enhances neutrophil migration into the bronchoalveolar spaces and improves the outcome of murine pneumonia-induced sepsis.
- Source :
-
Shock (Augusta, Ga.) [Shock] 2013 Apr; Vol. 39 (4), pp. 389-96. - Publication Year :
- 2013
-
Abstract
- A reduction of the neutrophil migration into the site of infection during cecal ligation and puncture-induced sepsis increases host mortality. Inhibition of heme oxygenase (HO) prevents this neutrophil paralysis and improves host survival in the cecal ligation and puncture model. Taking into account that almost 50% of all sepsis cases are a consequence of pneumonia, we designed the present study to determine the role of HO in an experimental model of pneumonia-induced sepsis. The objective of this study was to evaluate whether the inhibition of HO improves the outcome and pathophysiologic changes of sepsis induced by an intratracheal instillation of Klebsiella pneumoniae. The pretreatment of mice subjected to pneumonia-induced sepsis with ZnDPBG (zinc deuteroporphyrin 2,4-bis glycol), a nonspecific HO inhibitor, increased the number of neutrophils in the bronchoalveolar spaces, reduced the bacterial load at the site of infection, and prevented the upregulation of CD11b and the downregulation of CXCR2 on blood neutrophils. Moreover, the pretreatment with ZnDPBG decreased alveolar collapse, attenuating the deleterious changes in pulmonary mechanics and gas exchanges and, as a consequence, improved the survival rate of mice from 0% to ∼20%. These results show that heme oxygenase is involved in the pathophysiology of pneumonia-induced sepsis and suggest that HO inhibitors could be helpful for the management of this disease.
- Subjects :
- Acute Lung Injury prevention & control
Animals
Bacteremia microbiology
Bronchi enzymology
Chemokines metabolism
Creatine Kinase, MB Form metabolism
Cytokines metabolism
Deuteroporphyrins pharmacology
Enzyme Inhibitors pharmacology
Klebsiella Infections microbiology
Klebsiella pneumoniae
Mice
Pneumonia, Bacterial microbiology
Receptors, Interleukin-8B metabolism
Bacteremia enzymology
Heme Oxygenase (Decyclizing) antagonists & inhibitors
Immune System Diseases enzymology
Klebsiella Infections enzymology
Leukocyte Disorders enzymology
Pneumonia, Bacterial enzymology
Pulmonary Alveoli enzymology
Subjects
Details
- Language :
- English
- ISSN :
- 1540-0514
- Volume :
- 39
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Shock (Augusta, Ga.)
- Publication Type :
- Academic Journal
- Accession number :
- 23481491
- Full Text :
- https://doi.org/10.1097/SHK.0b013e31828bbcf9