The PARP-1 inhibitor INO-1001 facilitates hemodynamic stabilization without affecting DNA repair in porcine thoracic aortic cross-clamping-induced ischemia/reperfusion

Balázs Hauser, Michael Gröger, Ulrich Ehrmann, Maura Albicini, Uwe Bernd Brückner, Hubert Schelzig, Balasubramanian Venkatesh, Hongshan Li, Csaba Szabo, Günter Speit, Peter Radermacher, Jochen Kick

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Inhibition of poly (ADP-ribose) polymerase 1 (PARP-1) improved hemodynamics and organ function in various shock models induced by sepsis or ischemia/reperfusion. PARP-1, however, is also referred to play a pivotal role for the maintenance of genomic integrity. Therefore, we investigated the effect of the PARP-1 blocker INO-1001 on hemodynamics, kidney function, and DNA damage and repair during porcine thoracic aortic cross-clamping. The animals underwent 45 min of aortic cross-clamping after receiving vehicle (n = 9) or i.v. INO-1001 (n = 9; total dose, 4 mg•kg, administered both before clamping and during reperfusion), data were recorded before clamping, before declamping, and 2 and 4 h after declamping. During reperfusion, continuous i.v. norepinephrine was incrementally adjusted to maintain blood pressure greater than or equal to 80% of the preclamping level. The plasma INO-1001 levels analyzed with high-pressure liquid chromatography were 1 to 1.4 μmol/L and 0.4 to 0.6 μmol/L before and after clamping, respectively. Although INO-1001-treated animals required less norepinephrine support, kidney function was comparable in the 2 groups. There was no intergroup difference either in the time course of DNA damage and repair (comet assay) as assessed both in vivo in whole blood before surgery, before clamping, before declamping, 2 h after declamping, and ex vivo in isolated lymphocytes (Ficoll gradient) sampled immediately before clamping and analyzed before, immediately, and 1 and 2 h after exposure to 4 bar 100% O2 for 2 h. There was no difference either in the expression of the cyclin-dependent kinase inhibitor gene, p27, in the kidney (immunohistochemistry). The reduced norepinephrine requirements during reperfusion suggest a positive inotropic effect of INO-1001, as demonstrated by other authors. In our model, INO-1001 proved to be safe with respect to DNA repair.

Original languageEnglish (US)
Pages (from-to)633-640
Number of pages8
JournalShock
Volume25
Issue number6
DOIs
StatePublished - Jun 2006
Externally publishedYes

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Keywords

  • Comet assay
  • Cyclin-dependent kinase inhibitor gene
  • DNA strand breaks
  • Norepinephrine
  • p27
  • Renal function

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine
  • Physiology

Cite this

Hauser, B., Gröger, M., Ehrmann, U., Albicini, M., Brückner, U. B., Schelzig, H., Venkatesh, B., Li, H., Szabo, C., Speit, G., Radermacher, P., & Kick, J. (2006). The PARP-1 inhibitor INO-1001 facilitates hemodynamic stabilization without affecting DNA repair in porcine thoracic aortic cross-clamping-induced ischemia/reperfusion. Shock, 25(6), 633-640. https://doi.org/10.1097/01.shk.0000209561.61951.2e