Therapeutic Targeting of Extracellular DNA Improves the Outcome of Intestinal Ischemic Reperfusion Injury in Neonatal Rats

Overview

Journal Sci Rep

Specialty Science

Date 2017 Nov 15

PMID 29133856

Citations 31

Authors

Michael Boettcher

Georg Eschenburg

Stefan Mietzsch

Miguel Jimenez-Alcazar

Michaela Klinke

Deirdre Vincent

Bastian Tiemann

Robert Bergholz

Konrad Reinshagen

Tobias A Fuchs

Affiliations

Soon will be listed here.

Abstract

Thrombosis and inflammation cooperate in the development of intestinal infarction. Recent studies suggest that extracellular DNA released by damaged cells or neutrophils in form of extracellular traps (NETs) contributes to organ damage in experimental models of ischemia-reperfusion injury. Here we compared the therapeutic effects of targeting fibrin or extracellular DNA in intestinal infarction after midgut volvulus in rats. Following iatrogenic midgut volvulus induction for 3 hours, we treated animals with a combination of tissue plasminogen activator (tPA) and low molecular weight heparin (LMWH) to target fibrin or with DNase1 to degrade extracellular DNA. The therapeutic effects of tPA/LMWH and DNase1 were analyzed after 7 days. We observed that both therapeutic interventions ameliorated tissue injury, apoptosis, and oxidative stress in the intestine. DNase1, but not tPA/LMWH, reduced intestinal neutrophil infiltration and histone-myeloperoxidase-complexes, a surrogate marker of NETs, in circulation. Importantly, tPA/LMWH, but not DNase1, interfered with hemostasis as evidenced by a prolonged tail bleeding time. In conclusion, our data suggest that the therapeutic targeting of fibrin and extracellular DNA improves the outcome of midgut volvulus in rats. DNase1 therapy reduces the inflammatory response including NETs without increasing the risk of bleeding. Thus, targeting of extracellular DNA may provide a safe therapy for patients with intestinal infarction in future.

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