dc.contributor.author | Wright, William | |
dc.contributor.author | Kirkby, Nick | |
dc.contributor.author | MacKenzie, Louise Susan | |
dc.contributor.author | Lundberg, Martina | |
dc.contributor.author | Paul-Clark, M.J. | |
dc.contributor.author | Warner, T.D. | |
dc.date.accessioned | 2015-02-23T15:33:20Z | |
dc.date.available | 2015-02-23T15:33:20Z | |
dc.date.issued | 2011-06 | |
dc.identifier.citation | Wright , W , Kirkby , N , MacKenzie , L S , Lundberg , M , Paul-Clark , M J & Warner , T D 2011 , ' Role of COX-1 and COX-2 in the release of prostanoids in murine lung and isolated lung fibroblasts ' , Inflammation Research , vol. 60 , no. Supp 1 , P-103 . | |
dc.identifier.issn | 1023-3830 | |
dc.identifier.other | PURE: 8137532 | |
dc.identifier.other | PURE UUID: d5bbfe45-71a0-4718-8b85-64fc9f82b1c5 | |
dc.identifier.uri | http://hdl.handle.net/2299/15426 | |
dc.description.abstract | Cyclooxygenase (COX) is the first enzyme in the conversion of arachidonic acid to prostanoids. There are two isoforms of COX; COX-1, which is constitutively expressed with a homeostatic role in most tissues, and COX-2, which while constitutively expressed in some discreet sites is generally inducible by growth factors and during inflammation. In the current study, we have used tissues and cells from knock-out mice to investigate the relative contributions of COX-1 and COX-2 to PGE2 production by lung tissue ex vivo and by proliferating lung fibroblasts in vitro. Lung tissues from WT (C57Bl6), COX-1-/- and COX-2-/- mice were immediately dissected (<15 min after death) and incubated (37 °C) for 30 min in DMEM containing 50 µM calcium ionophore (A23187). Release of PGE2 was determined by competitive immunoassay. In parallel studies, murine lung fibroblasts from COX-1-/- and COX-2-/- mice were explanted and cultured before being seeded in 96-well plates at sub-confluence (5000-8000/well) and incubated for 24-48 hours in the presence of 10% FCS. Accumulated release of PGE2 was then measured as above. Over 30 min PGE2 was released by lung pieces from wild type (1117 ± 55 pg/ml) and COX-2-/- (2013 ± 255 pg/ml) but not from COX-1-/- (<61pg/ml) mice (n=4). In contrast, proliferating lung fibroblasts from COX-1-/- (4978.9 ± 1392 pg/ml) mice released higher levels of PGE2 than cells from COX-2-/- (1194 ± 617 ng/ml) mice (n=4 using cells from 2-3 separate mice for each genotype). These results show that COX-1 activity underpins the stimulated release of PGE2 in healthy mouse lung tissue. Conversely, COX-2 activity predominates in proliferating lung fibroblasts, which may be important as COX-derived PGE2 mediates proliferation of lung fibroblasts (Trends Immunol.2004;25(1):40-6). Our results suggest a switch in COX isoform in lung cells during proliferation which could be relevant to our understanding of conditions such as idiopathic pulmonary fibrosis. | en |
dc.language.iso | eng | |
dc.relation.ispartof | Inflammation Research | |
dc.title | Role of COX-1 and COX-2 in the release of prostanoids in murine lung and isolated lung fibroblasts | en |
dc.contributor.institution | School of Life and Medical Sciences | |
dc.contributor.institution | Health & Human Sciences Research Institute | |
dc.contributor.institution | Department of Human and Environmental Sciences | |
dc.contributor.institution | Pharmacology and Clinical Science Research | |
dc.contributor.institution | Agriculture, Food and Veterinary Sciences | |
dc.contributor.institution | Cardiovascular Pathologies | |
dc.contributor.institution | Diabetic neuropathies | |
dc.description.status | Non peer reviewed | |
rioxxterms.version | AM | |
rioxxterms.type | Other | |
herts.preservation.rarelyaccessed | true | |