A synthetic epoxyeicosatrienoic acid analogue prevents the initiation of ischemic acute kidney injury

Uwe Hoff, Gordana Bubalo, Mandy Fechner, Maximilian Blum, Ye Zhu, Andreas Pohlmann, Jan Hentschel, Karen Arakelyan, Erdmann Seeliger, Bert Flemming, Dennis Gürgen, Michael Rothe, Thoralf Niendorf, Vijaya L. Manthati, John R. Falck, Michael Haase, Wolf Hagen Schunck, Duska Dragun

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Aim: Imbalances in cytochrome P450 (CYP)-dependent eicosanoid formation may play a central role in ischemic acute kidney injury (AKI). We reported previously that inhibition of 20-hydroxyeicosatetraenoic acid (20-HETE) action ameliorated ischemia/reperfusion (I/R)-induced AKI in rats. Now we tested the hypothesis that enhancement of epoxyeicosatrienoic acid (EET) actions may counteract the detrimental effects of 20-HETE and prevent the initiation of AKI. Methods: Male Lewis rats underwent right nephrectomy and ischemia was induced by 45 min clamping of the left renal pedicle followed by up to 48 h of reperfusion. Circulating CYP-eicosanoid profiles were compared in patients who underwent cardiac surgery with (n = 21) and without (n = 38) developing postoperative AKI. Results: Ischemia induced an about eightfold increase of renal 20-HETE levels, whereas free EETs were not accumulated. To compensate for this imbalance, a synthetic 14,15-EET analogue was administered by intrarenal infusion before ischemia. The EET analogue improved renal reoxygenation as monitored by in vivo parametric MRI during the initial 2 h reperfusion phase. The EET analogue improved PI3K- as well as mTORC2-dependent rephosphorylation of Akt, induced inactivation of GSK-3β, reduced the development of tubular apoptosis and attenuated inflammatory cell infiltration. The EET analogue also significantly alleviated the I/R-induced drop in creatinine clearance. Patients developing postoperative AKI featured increased preoperative 20-HETE and 8,9-EET levels. Conclusions: Pharmacological interventions targeting the CYP-eicosanoid pathway could offer promising new options for AKI prevention. Individual differences in CYP-eicosanoid formation may contribute to the risk of developing AKI in clinical settings.

Original languageEnglish (US)
Article numbere13297
JournalActa Physiologica
Volume227
Issue number2
DOIs
StatePublished - Oct 1 2019

Keywords

  • CYP-eicosanoids
  • acute kidney injury
  • inflammation
  • reoxygenation
  • signalling

ASJC Scopus subject areas

  • Physiology

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    Hoff, U., Bubalo, G., Fechner, M., Blum, M., Zhu, Y., Pohlmann, A., Hentschel, J., Arakelyan, K., Seeliger, E., Flemming, B., Gürgen, D., Rothe, M., Niendorf, T., Manthati, V. L., Falck, J. R., Haase, M., Schunck, W. H., & Dragun, D. (2019). A synthetic epoxyeicosatrienoic acid analogue prevents the initiation of ischemic acute kidney injury. Acta Physiologica, 227(2), [e13297]. https://doi.org/10.1111/apha.13297