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Research ArticleCARDIOVASCULAR

Acute Aspirin Treatment Abolishes, whereas Acute Ibuprofen Treatment Enhances Morphine-Induced Cardioprotection: Role of 12-Lipoxygenase

Eric R. Gross, Anna K. Hsu and Garrett J. Gross
Journal of Pharmacology and Experimental Therapeutics July 2004, 310 (1) 185-191; DOI: https://doi.org/10.1124/jpet.103.064667
Eric R. Gross
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Anna K. Hsu
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Garrett J. Gross
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Abstract

Patients suffering an acute myocardial infarction routinely receive morphine and nonsteroidal anti-inflammatory drugs (NSAIDs) alone or in combination. However, the importance of the dose, timing, or the combined administration of both on infarct size reduction has not been assessed. Additionally, it is not known whether morphine or NSAIDs require 12-lipoxygenase (12-LO) to mediate infarct size reduction as found previously for ischemic preconditioning. Male Sprague-Dawley rats were subjected to 30 min of ischemia and 2 h of reperfusion, followed by infarct size assessment (mean ± S.E.M.%, **P < 0.01). Morphine (0.3 mg/kg), ibuprofen (3 mg/kg), but not aspirin (3 mg/kg) reduced infarct size when administered 5 min before reperfusion compared with vehicle (42.3 ± 1.5**, 40.8 ± 2.8**, 60.7 ± 2.3 versus 59.1 ± 1.7%, respectively); however, none of these agents reduced infarct size when administered 10 s after reperfusion. Ibuprofen (3 mg/kg) administered with morphine (0.3 mg/kg) reduced infarct size (43.7 ± 1.3%**), whereas aspirin (1 and 3 mg/kg) abolished morphine-induced infarct size reduction. Morphine (0.2 mg/kg) and ibuprofen (0.6 mg/kg) given at doses not effective individually reduced infarct size when given together (59.0 ± 1.4, 57.6 ± 2.8, and 43.9 ± 1.6%**, respectively). Morphine- and ibuprofen-induced infarct size reduction was abolished by the 12-LO inhibitor baicalein (3 mg/kg) and mimicked by the 12-LO metabolite 12-(S)-hydroxyeicosa-5Z,8Z,10Z,14Z-tetraenoic acid (45.2 ± 2.5%**). These data suggest that morphine and ibuprofen reduce infarct size individually or at subthreshold doses in combination by 12-LO when administered 5 min before reperfusion. Furthermore, acute aspirin administration has a detrimental interaction with morphine that abrogates morphine-induced infarct size reduction.

Footnotes

  • This work was supported by National Institutes of Health Grants HL08311 and HL074314 (to G.J.G.) and an American Heart Association Predoctoral Fellowship (Northland Affiliate, to E.R.G.).

  • DOI: 10.1124/jpet.103.064667.

  • ABBREVIATIONS: 12-LO, 12-lipoxygenase; HETE, hydroxyeicosa-5Z,8Z,10Z,14Z-tetraenoic acid; DMSO, dimethyl sulfoxide; OFR, oxygen-derived free radical.

    • Received December 18, 2003.
    • Accepted March 1, 2004.
  • The American Society for Pharmacology and Experimental Therapeutics
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Journal of Pharmacology and Experimental Therapeutics: 310 (1)
Journal of Pharmacology and Experimental Therapeutics
Vol. 310, Issue 1
1 Jul 2004
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Research ArticleCARDIOVASCULAR

Acute Aspirin Treatment Abolishes, whereas Acute Ibuprofen Treatment Enhances Morphine-Induced Cardioprotection: Role of 12-Lipoxygenase

Eric R. Gross, Anna K. Hsu and Garrett J. Gross
Journal of Pharmacology and Experimental Therapeutics July 1, 2004, 310 (1) 185-191; DOI: https://doi.org/10.1124/jpet.103.064667

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Research ArticleCARDIOVASCULAR

Acute Aspirin Treatment Abolishes, whereas Acute Ibuprofen Treatment Enhances Morphine-Induced Cardioprotection: Role of 12-Lipoxygenase

Eric R. Gross, Anna K. Hsu and Garrett J. Gross
Journal of Pharmacology and Experimental Therapeutics July 1, 2004, 310 (1) 185-191; DOI: https://doi.org/10.1124/jpet.103.064667
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