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| Content Provider | PubMed Central |
|---|---|
| Author | Morgan, Alwena H. Vincent, Dioszeghy Maskrey, Benjamin H. Thomas, Christopher P. Clark, Stephen R. Mathie, Sara A. Lloyd, Clare M. Kühn, Hartmut Topley, Nicholas Coles, Barbara C. Taylor, Philip R. Jones, Simon A. O'donnell, Valerie B. |
| Abstract | In this study, murine peritoneal macrophages from naïve lavage were found to generate four phospholipids that contain 12-hydroxyeicosatetraenoic acid (12-HETE). They comprise three plasmalogen and one diacyl phosphatidylethanolamines (PEs) (16:0p, 18:1p, 18:0p, and 18:0a at sn-1) and are absent in macrophages from 12/15-lipoxygenase (12/15-LOX)-deficient mice. They are generated acutely in response to calcium mobilization, are primarily cell-associated, and are detected on the outside of the plasma membrane. Levels of 12-HETE-PEs in naïve lavage are in a similar range to those of free 12-HETE (5.5 ± 0.2 ng or 18.5 ± 1.03 ng/lavage for esterified versus free, respectively). In healthy mice, 12/15-LOX-derived 12-HETE-PEs are found in the peritoneal cavity, peritoneal membrane, lymph node, and intestine, with a similar distribution to 12/15-LOX-derived 12-HETE. In vivo generation of 12-HETE-PEs occurs in a Th2-dependent model of murine lung inflammation associated with interleukin-4/interleukin-13 expression. In contrast, in Toll receptor-dependent peritonitis mediated either by live bacteria or bacterial products, 12-HETE-PEs are rapidly cleared during the acute phase then reappear during resolution. The human homolog, 18:0a/15-HETE-PE inhibited human monocyte generation of cytokines in response to lipopolysaccharide. In summary, a new family of lipid mediators generated by murine macrophages during Th2 inflammation are identified and structurally characterized. The studies suggest a new paradigm for lipids generated by 12/15-LOX in inflammation involving formation of esterified eicosanoids. |
| Related Links | http://dx.doi.org/10.1074/jbc.m109.021634 |
| Ending Page | 21191 |
| Page Count | 7 |
| Starting Page | 21185 |
| File Format | |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | The Journal of Biological Chemistry |
| Issue Number | 32 |
| Volume Number | 284 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology |
| Publisher Date | 2009-08-07 |
| Access Restriction | Open |
| Rights Holder | American Society for Biochemistry and Molecular Biology |
| Subject Keyword | Cell Biology Biochemistry Molecular Biology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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