author_facet Neupert, Werner
Brugger, Roland
Euchenhofer, Christian
Brune, Kay
Geisslinger, Gerd
Neupert, Werner
Brugger, Roland
Euchenhofer, Christian
Brune, Kay
Geisslinger, Gerd
author Neupert, Werner
Brugger, Roland
Euchenhofer, Christian
Brune, Kay
Geisslinger, Gerd
spellingShingle Neupert, Werner
Brugger, Roland
Euchenhofer, Christian
Brune, Kay
Geisslinger, Gerd
British Journal of Pharmacology
Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
Pharmacology
author_sort neupert, werner
spelling Neupert, Werner Brugger, Roland Euchenhofer, Christian Brune, Kay Geisslinger, Gerd 0007-1188 1476-5381 Wiley Pharmacology http://dx.doi.org/10.1038/sj.bjp.0701415 <jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Ibuprofen enantiomers and their respective coenzyme A thioesters were tested in human platelets and blood monocytes to determine their selectivity and potency as inhibitors of cyclo‐oxygenase activity of prostaglandin endoperoxide synthase‐1 (PGHS‐1) and PGHS‐2.</jats:p></jats:list-item> <jats:list-item><jats:p>Human blood from volunteers was drawn and allowed to clot at 37°C for 1 h in the presence of increasing concentrations of the test compounds (<jats:bold>R</jats:bold>‐ibuprofen, <jats:bold>S</jats:bold>‐ibuprofen, <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA, <jats:bold>S</jats:bold>‐ibuprofenoyl‐CoA, NS‐398). Immunoreactive (ir) thromboxane B<jats:sub>2</jats:sub> (TXB<jats:sub>2</jats:sub>) concentrations in serum were determined by a specific EIA assay as an index of the cyclo‐oxygenase activity of platelet PGHS‐1.</jats:p></jats:list-item> <jats:list-item><jats:p>Heparin‐treated blood from the same donors was incubated at 37°C for 24 h with the same concentrations of the test compounds in the presence of lipopolysaccharide (LPS, 10 μg ml<jats:sup>−1</jats:sup>). The contribution of PGHS‐1 was suppressed by pretreatment of the volunteers with aspirin (500 mg; 48 h before venepuncture). As a measure of LPS induced PGHS‐2 activity immunoreactive prostaglandin E<jats:sub>2</jats:sub> (irPGE<jats:sub>2</jats:sub>) plasma concentrations were determined by a specific EIA assay.</jats:p></jats:list-item> <jats:list-item><jats:p><jats:bold>S</jats:bold>‐ibuprofen inhibited the activity of PGHS‐1 (IC<jats:sub>50</jats:sub> 2.1 μ<jats:sc>M</jats:sc>) and PGHS‐2 (IC<jats:sub>50</jats:sub> 1.6 μ<jats:sc>M</jats:sc>) equally. <jats:bold>R</jats:bold>‐ibuprofen inhibited PGHS‐1 (IC<jats:sub>50</jats:sub> 34.9) less potently than <jats:bold>S</jats:bold>‐ibuprofen and showed no inhibition of PGHS‐2 up to 250 μ<jats:sc>M</jats:sc>. By contrast <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester inhibited PGE<jats:sub>2</jats:sub> production from LPS‐stimulated monocytes almost two orders of magnitude more potently than the generation of TXB<jats:sub>2</jats:sub> (IC<jats:sub>50</jats:sub> 5.6 vs 219 μ<jats:sc>M</jats:sc>).</jats:p></jats:list-item> <jats:list-item><jats:p>Western blotting of PGHS‐2 after LPS induction of blood monocytes showed a concentration‐dependent inhibition of PGHS‐2 protein expression by ibuprofenoyl‐CoA thioesters.</jats:p></jats:list-item> <jats:list-item><jats:p>These data confirm that <jats:bold>S</jats:bold>‐ibuprofen represents the active entity in the racemate with respect to cyclo‐oxygenase activity. More importantly the data suggest a contribution of the <jats:bold>R</jats:bold>‐enantiomer to therapeutic effects not only by chiral inversion to <jats:bold>S</jats:bold>‐ibuprofen but also via inhibition of induction of PGHS‐2 mediated by <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester.</jats:p></jats:list-item> <jats:list-item><jats:p>The data may explain why racemic ibuprofen is ranked as one of the safest non‐steroidal anti‐inflammatory drugs (NSAIDs) so far determined in epidemiological studies.</jats:p></jats:list-item> </jats:list> </jats:p><jats:p><jats:italic>British Journal of Pharmacology</jats:italic> (1997) <jats:bold>122</jats:bold>, 487–492; doi:<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" xlink:href="10.1038/sj.bjp.0701415">10.1038/sj.bjp.0701415</jats:ext-link></jats:p> Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases British Journal of Pharmacology
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title Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_unstemmed Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_full Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_fullStr Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_full_unstemmed Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_short Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_sort effects of ibuprofen enantiomers and its coenzyme a thioesters on human prostaglandin endoperoxide synthases
topic Pharmacology
url http://dx.doi.org/10.1038/sj.bjp.0701415
publishDate 1997
physical 487-492
description <jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Ibuprofen enantiomers and their respective coenzyme A thioesters were tested in human platelets and blood monocytes to determine their selectivity and potency as inhibitors of cyclo‐oxygenase activity of prostaglandin endoperoxide synthase‐1 (PGHS‐1) and PGHS‐2.</jats:p></jats:list-item> <jats:list-item><jats:p>Human blood from volunteers was drawn and allowed to clot at 37°C for 1 h in the presence of increasing concentrations of the test compounds (<jats:bold>R</jats:bold>‐ibuprofen, <jats:bold>S</jats:bold>‐ibuprofen, <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA, <jats:bold>S</jats:bold>‐ibuprofenoyl‐CoA, NS‐398). Immunoreactive (ir) thromboxane B<jats:sub>2</jats:sub> (TXB<jats:sub>2</jats:sub>) concentrations in serum were determined by a specific EIA assay as an index of the cyclo‐oxygenase activity of platelet PGHS‐1.</jats:p></jats:list-item> <jats:list-item><jats:p>Heparin‐treated blood from the same donors was incubated at 37°C for 24 h with the same concentrations of the test compounds in the presence of lipopolysaccharide (LPS, 10 μg ml<jats:sup>−1</jats:sup>). The contribution of PGHS‐1 was suppressed by pretreatment of the volunteers with aspirin (500 mg; 48 h before venepuncture). As a measure of LPS induced PGHS‐2 activity immunoreactive prostaglandin E<jats:sub>2</jats:sub> (irPGE<jats:sub>2</jats:sub>) plasma concentrations were determined by a specific EIA assay.</jats:p></jats:list-item> <jats:list-item><jats:p><jats:bold>S</jats:bold>‐ibuprofen inhibited the activity of PGHS‐1 (IC<jats:sub>50</jats:sub> 2.1 μ<jats:sc>M</jats:sc>) and PGHS‐2 (IC<jats:sub>50</jats:sub> 1.6 μ<jats:sc>M</jats:sc>) equally. <jats:bold>R</jats:bold>‐ibuprofen inhibited PGHS‐1 (IC<jats:sub>50</jats:sub> 34.9) less potently than <jats:bold>S</jats:bold>‐ibuprofen and showed no inhibition of PGHS‐2 up to 250 μ<jats:sc>M</jats:sc>. By contrast <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester inhibited PGE<jats:sub>2</jats:sub> production from LPS‐stimulated monocytes almost two orders of magnitude more potently than the generation of TXB<jats:sub>2</jats:sub> (IC<jats:sub>50</jats:sub> 5.6 vs 219 μ<jats:sc>M</jats:sc>).</jats:p></jats:list-item> <jats:list-item><jats:p>Western blotting of PGHS‐2 after LPS induction of blood monocytes showed a concentration‐dependent inhibition of PGHS‐2 protein expression by ibuprofenoyl‐CoA thioesters.</jats:p></jats:list-item> <jats:list-item><jats:p>These data confirm that <jats:bold>S</jats:bold>‐ibuprofen represents the active entity in the racemate with respect to cyclo‐oxygenase activity. More importantly the data suggest a contribution of the <jats:bold>R</jats:bold>‐enantiomer to therapeutic effects not only by chiral inversion to <jats:bold>S</jats:bold>‐ibuprofen but also via inhibition of induction of PGHS‐2 mediated by <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester.</jats:p></jats:list-item> <jats:list-item><jats:p>The data may explain why racemic ibuprofen is ranked as one of the safest non‐steroidal anti‐inflammatory drugs (NSAIDs) so far determined in epidemiological studies.</jats:p></jats:list-item> </jats:list> </jats:p><jats:p><jats:italic>British Journal of Pharmacology</jats:italic> (1997) <jats:bold>122</jats:bold>, 487–492; doi:<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" xlink:href="10.1038/sj.bjp.0701415">10.1038/sj.bjp.0701415</jats:ext-link></jats:p>
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author Neupert, Werner, Brugger, Roland, Euchenhofer, Christian, Brune, Kay, Geisslinger, Gerd
author_facet Neupert, Werner, Brugger, Roland, Euchenhofer, Christian, Brune, Kay, Geisslinger, Gerd, Neupert, Werner, Brugger, Roland, Euchenhofer, Christian, Brune, Kay, Geisslinger, Gerd
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description <jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Ibuprofen enantiomers and their respective coenzyme A thioesters were tested in human platelets and blood monocytes to determine their selectivity and potency as inhibitors of cyclo‐oxygenase activity of prostaglandin endoperoxide synthase‐1 (PGHS‐1) and PGHS‐2.</jats:p></jats:list-item> <jats:list-item><jats:p>Human blood from volunteers was drawn and allowed to clot at 37°C for 1 h in the presence of increasing concentrations of the test compounds (<jats:bold>R</jats:bold>‐ibuprofen, <jats:bold>S</jats:bold>‐ibuprofen, <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA, <jats:bold>S</jats:bold>‐ibuprofenoyl‐CoA, NS‐398). Immunoreactive (ir) thromboxane B<jats:sub>2</jats:sub> (TXB<jats:sub>2</jats:sub>) concentrations in serum were determined by a specific EIA assay as an index of the cyclo‐oxygenase activity of platelet PGHS‐1.</jats:p></jats:list-item> <jats:list-item><jats:p>Heparin‐treated blood from the same donors was incubated at 37°C for 24 h with the same concentrations of the test compounds in the presence of lipopolysaccharide (LPS, 10 μg ml<jats:sup>−1</jats:sup>). The contribution of PGHS‐1 was suppressed by pretreatment of the volunteers with aspirin (500 mg; 48 h before venepuncture). As a measure of LPS induced PGHS‐2 activity immunoreactive prostaglandin E<jats:sub>2</jats:sub> (irPGE<jats:sub>2</jats:sub>) plasma concentrations were determined by a specific EIA assay.</jats:p></jats:list-item> <jats:list-item><jats:p><jats:bold>S</jats:bold>‐ibuprofen inhibited the activity of PGHS‐1 (IC<jats:sub>50</jats:sub> 2.1 μ<jats:sc>M</jats:sc>) and PGHS‐2 (IC<jats:sub>50</jats:sub> 1.6 μ<jats:sc>M</jats:sc>) equally. <jats:bold>R</jats:bold>‐ibuprofen inhibited PGHS‐1 (IC<jats:sub>50</jats:sub> 34.9) less potently than <jats:bold>S</jats:bold>‐ibuprofen and showed no inhibition of PGHS‐2 up to 250 μ<jats:sc>M</jats:sc>. By contrast <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester inhibited PGE<jats:sub>2</jats:sub> production from LPS‐stimulated monocytes almost two orders of magnitude more potently than the generation of TXB<jats:sub>2</jats:sub> (IC<jats:sub>50</jats:sub> 5.6 vs 219 μ<jats:sc>M</jats:sc>).</jats:p></jats:list-item> <jats:list-item><jats:p>Western blotting of PGHS‐2 after LPS induction of blood monocytes showed a concentration‐dependent inhibition of PGHS‐2 protein expression by ibuprofenoyl‐CoA thioesters.</jats:p></jats:list-item> <jats:list-item><jats:p>These data confirm that <jats:bold>S</jats:bold>‐ibuprofen represents the active entity in the racemate with respect to cyclo‐oxygenase activity. More importantly the data suggest a contribution of the <jats:bold>R</jats:bold>‐enantiomer to therapeutic effects not only by chiral inversion to <jats:bold>S</jats:bold>‐ibuprofen but also via inhibition of induction of PGHS‐2 mediated by <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester.</jats:p></jats:list-item> <jats:list-item><jats:p>The data may explain why racemic ibuprofen is ranked as one of the safest non‐steroidal anti‐inflammatory drugs (NSAIDs) so far determined in epidemiological studies.</jats:p></jats:list-item> </jats:list> </jats:p><jats:p><jats:italic>British Journal of Pharmacology</jats:italic> (1997) <jats:bold>122</jats:bold>, 487–492; doi:<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" xlink:href="10.1038/sj.bjp.0701415">10.1038/sj.bjp.0701415</jats:ext-link></jats:p>
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spelling Neupert, Werner Brugger, Roland Euchenhofer, Christian Brune, Kay Geisslinger, Gerd 0007-1188 1476-5381 Wiley Pharmacology http://dx.doi.org/10.1038/sj.bjp.0701415 <jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Ibuprofen enantiomers and their respective coenzyme A thioesters were tested in human platelets and blood monocytes to determine their selectivity and potency as inhibitors of cyclo‐oxygenase activity of prostaglandin endoperoxide synthase‐1 (PGHS‐1) and PGHS‐2.</jats:p></jats:list-item> <jats:list-item><jats:p>Human blood from volunteers was drawn and allowed to clot at 37°C for 1 h in the presence of increasing concentrations of the test compounds (<jats:bold>R</jats:bold>‐ibuprofen, <jats:bold>S</jats:bold>‐ibuprofen, <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA, <jats:bold>S</jats:bold>‐ibuprofenoyl‐CoA, NS‐398). Immunoreactive (ir) thromboxane B<jats:sub>2</jats:sub> (TXB<jats:sub>2</jats:sub>) concentrations in serum were determined by a specific EIA assay as an index of the cyclo‐oxygenase activity of platelet PGHS‐1.</jats:p></jats:list-item> <jats:list-item><jats:p>Heparin‐treated blood from the same donors was incubated at 37°C for 24 h with the same concentrations of the test compounds in the presence of lipopolysaccharide (LPS, 10 μg ml<jats:sup>−1</jats:sup>). The contribution of PGHS‐1 was suppressed by pretreatment of the volunteers with aspirin (500 mg; 48 h before venepuncture). As a measure of LPS induced PGHS‐2 activity immunoreactive prostaglandin E<jats:sub>2</jats:sub> (irPGE<jats:sub>2</jats:sub>) plasma concentrations were determined by a specific EIA assay.</jats:p></jats:list-item> <jats:list-item><jats:p><jats:bold>S</jats:bold>‐ibuprofen inhibited the activity of PGHS‐1 (IC<jats:sub>50</jats:sub> 2.1 μ<jats:sc>M</jats:sc>) and PGHS‐2 (IC<jats:sub>50</jats:sub> 1.6 μ<jats:sc>M</jats:sc>) equally. <jats:bold>R</jats:bold>‐ibuprofen inhibited PGHS‐1 (IC<jats:sub>50</jats:sub> 34.9) less potently than <jats:bold>S</jats:bold>‐ibuprofen and showed no inhibition of PGHS‐2 up to 250 μ<jats:sc>M</jats:sc>. By contrast <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester inhibited PGE<jats:sub>2</jats:sub> production from LPS‐stimulated monocytes almost two orders of magnitude more potently than the generation of TXB<jats:sub>2</jats:sub> (IC<jats:sub>50</jats:sub> 5.6 vs 219 μ<jats:sc>M</jats:sc>).</jats:p></jats:list-item> <jats:list-item><jats:p>Western blotting of PGHS‐2 after LPS induction of blood monocytes showed a concentration‐dependent inhibition of PGHS‐2 protein expression by ibuprofenoyl‐CoA thioesters.</jats:p></jats:list-item> <jats:list-item><jats:p>These data confirm that <jats:bold>S</jats:bold>‐ibuprofen represents the active entity in the racemate with respect to cyclo‐oxygenase activity. More importantly the data suggest a contribution of the <jats:bold>R</jats:bold>‐enantiomer to therapeutic effects not only by chiral inversion to <jats:bold>S</jats:bold>‐ibuprofen but also via inhibition of induction of PGHS‐2 mediated by <jats:bold>R</jats:bold>‐ibuprofenoyl‐CoA thioester.</jats:p></jats:list-item> <jats:list-item><jats:p>The data may explain why racemic ibuprofen is ranked as one of the safest non‐steroidal anti‐inflammatory drugs (NSAIDs) so far determined in epidemiological studies.</jats:p></jats:list-item> </jats:list> </jats:p><jats:p><jats:italic>British Journal of Pharmacology</jats:italic> (1997) <jats:bold>122</jats:bold>, 487–492; doi:<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" xlink:href="10.1038/sj.bjp.0701415">10.1038/sj.bjp.0701415</jats:ext-link></jats:p> Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases British Journal of Pharmacology
spellingShingle Neupert, Werner, Brugger, Roland, Euchenhofer, Christian, Brune, Kay, Geisslinger, Gerd, British Journal of Pharmacology, Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases, Pharmacology
title Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_full Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_fullStr Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_full_unstemmed Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_short Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
title_sort effects of ibuprofen enantiomers and its coenzyme a thioesters on human prostaglandin endoperoxide synthases
title_unstemmed Effects of ibuprofen enantiomers and its coenzyme A thioesters on human prostaglandin endoperoxide synthases
topic Pharmacology
url http://dx.doi.org/10.1038/sj.bjp.0701415