Histological comparison of arterial thrombi in mice and men and the influence of Cl-amidine on thrombus formation.

Abstract

AIMS:

Medical treatment of arterial thrombosis is mainly directed against platelets and coagulation factors, and can lead to bleeding complications. Novel antithrombotic therapies targeting immune cells and neutrophil extracellular traps (NETs) are currently being investigated in animals. We addressed whether immune cell composition of arterial thrombi induced in mouse models of thrombosis resemble those of human patients with acute myocardial infarction (AMI).

METHODS AND RESULTS:

In a prospective cohort study of patients suffering from AMI, 81 human arterial thrombi were harvested during percutaneous coronary intervention and subjected to detailed histological analysis. In mice, arterial thrombi were induced using two distinct experimental models, ferric chloride (FeCl3) and wire injury of the carotid artery. We found that murine arterial thrombi induced by FeCl3 were highly concordant with human coronary thrombi regarding their immune cell composition, with neutrophils being the most abundant cell type, as well as the presence of NETs and coagulation factors. Pharmacological treatment of mice with the protein arginine deiminase (PAD)-inhibitor Cl-amidine abrogated NET formation, reduced arterial thrombosis and limited injury in a model of myocardial infarction.

CONCLUSIONS:

Neutrophils are a hallmark of arterial thrombi in patients suffering from acute myocardial infarction and in mouse models of arterial thrombosis. Inhibition of PAD could represent an interesting strategy for the treatment of arterial thrombosis to reduce neutrophil-associated tissue damage and improve functional outcome.

• Authors: Julia Novotny, Sue Chandraratne, Tobias Weinberger, Vanessa Philippi, Konstantin Stark, Andreas Ehrlich, Joachim Pircher, Ildiko Konrad, Paul Oberdieck, Anna Titova, Qendresa Hoti, Irene Schubert, Kyle R Legate, Nicole Urtz, Michael Lorenz, Jaroslav Pelisek, Steffen Massberg, Marie-Luise von Brühl, Christian Schulz
• Journal: PloS one (PLoS One) Vol. 13 Issue 1 Pg. e0190728 ( 2018) ISSN: 1932-6203 [Electronic] United States
• PMID: 29293656 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Chlorides
• Ferric Compounds
• N-alpha-benzoyl-N5-(2-chloro-1-iminoethyl)-L-ornithine amide
• Ornithine
• ferric chloride

Topics

• Aged
• Animals
• Chlorides (administration & dosage)
• Coronary Vessels (pathology)
• Disease Models, Animal
• Female
• Ferric Compounds (administration & dosage)
• Humans
• Male
• Mice
• Middle Aged
• Myocardial Infarction (pathology)
• Ornithine (analogs & derivatives, pharmacology)
• Prospective Studies
• Thrombosis (pathology)