5-Lipoxygenase knockout mice exhibit a resistance to pleurisy and lung injury caused by carrageenan

Salvatore Cuzzocrea, Antonietta Rossi, Ivana Serraino, Emanuela Mazzon, Rosanna Di Paola, Laura Dugo, Tiziana Genovese, Barbara Calabrò, Achille P. Caputi, Lidia Sautebint

Research output: Contribution to journalArticlepeer-review


In the present study, by comparing the responses in wild-type (WT) mice and mice lacking [knockout (KO)] the 5-lipoxygenase (5-LO), we investigated the role played by 5-LO in the development of acute inflammation. When compared with carragenan-treated 5-LOWT mice, 5-LOKO mice, which had received carrageenan, exhibited a reduced degree of pleural exudation, polymorphonuclear cell migration. Lung myeloperoxidase activity, an index of neutrophil infiltration, was significantly reduced in 5-LOKO mice in comparison with 5-LOWT. Lung-tissue sections from carrageenan-treated 5-LOWT mice showed positive staining for intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), P-selectin, and E-selectin, which were mainly localized around vessels. The intensity and degree of ICAM-1, VCAM-1, P-selectin, and E-selectin were markedly reduced in tissue section from carrageenan-5-LOKO mice, which also improved the histological status of the inflamed lungs. Taken together, our results clearly demonstrate that 5-LO modulates neutrophil infiltration in the acute lung inflammation.

Original languageEnglish
Pages (from-to)739-746
Number of pages8
JournalJournal of Leukocyte Biology
Issue number6
Publication statusPublished - Jun 2003


  • Adhesion molecules
  • Inflammation

ASJC Scopus subject areas

  • Cell Biology


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