Thromb Haemost 2016; 115(04): 781-788
DOI: 10.1160/TH15-05-0429
Blood Cells, Inflammation and Infection
Schattauer GmbH

Developmental endothelial locus-1 modulates platelet-monocyte interactions and instant blood-mediated inflammatory reaction in islet transplantation

Ioannis Kourtzelis*
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Klara Kotlabova*
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Jong-Hyung Lim
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Ioannis Mitroulis
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
2   Institute of Clinical Chemistry and Laboratory Medicine, Medical Faculty, Technische Universität Dresden, Dresden, Germany
,
Anaisa Ferreira
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Lan-Sun Chen
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Bettina Gercken
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Anja Steffen
3   Paul Langerhans Institute Dresden of Helmholtz Centre Munich at University Clinic Carl Gustav Carus of TU Dresden and DZDGerman Centre for Diabetes Research, Dresden, Germany
4   Department of Medicine III, Technische Universität Dresden, Dresden, Germany
,
Elisabeth Kemter
5   Chair for Molecular Animal Breeding and Biotechnology, and Laboratory for Functional Genome Analysis, Gene Center, Ludwig-Maximilians-Universität München, Munich, Germany
,
Anne Klotzsche-von Ameln
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
,
Claudia Waskow
6   Institute of Immunology, Medical Faculty, Technische Universität Dresden, Dresden, Germany;
,
Kavita Hosur
7   University of Pennsylvania, Penn Dental Medicine, Department of Microbiology, Philadelphia, Pennsylvania, USA
,
Antonios Chatzigeorgiou
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
2   Institute of Clinical Chemistry and Laboratory Medicine, Medical Faculty, Technische Universität Dresden, Dresden, Germany
,
Barbara Ludwig
3   Paul Langerhans Institute Dresden of Helmholtz Centre Munich at University Clinic Carl Gustav Carus of TU Dresden and DZDGerman Centre for Diabetes Research, Dresden, Germany
4   Department of Medicine III, Technische Universität Dresden, Dresden, Germany
,
Eckhard Wolf
5   Chair for Molecular Animal Breeding and Biotechnology, and Laboratory for Functional Genome Analysis, Gene Center, Ludwig-Maximilians-Universität München, Munich, Germany
,
George Hajishengallis
7   University of Pennsylvania, Penn Dental Medicine, Department of Microbiology, Philadelphia, Pennsylvania, USA
,
Triantafyllos Chavakis
1   Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
2   Institute of Clinical Chemistry and Laboratory Medicine, Medical Faculty, Technische Universität Dresden, Dresden, Germany
› Author Affiliations
Further Information

Publication History

Received: 26 May 2015

Accepted after major revision: 25 November 2015

Publication Date:
28 November 2017 (online)

Summary

Platelet-monocyte interactions are strongly implicated in thrombo-inflammatory injury by actively contributing to intravascular inflammation, leukocyte recruitment to inflamed sites, and the amplification of the procoagulant response. Instant blood-mediated inflammatory reaction (IBMIR) represents thrombo-inflammatory injury elicited upon pancreatic islet transplantation (islet-Tx), thereby dramatically affecting transplant survival and function. Developmental endothelial locus-1 (Del-1) is a functionally versatile endothelial cell-derived homeostatic factor with anti-inflammatory properties, but its potential role in IBMIR has not been previously addressed. Here, we establish Del-1 as a novel inhibitor of IBMIR using a whole blood–islet model and a syngeneic murine transplantation model. Indeed, Del-1 pre-treatment of blood before addition of islets diminished coagulation activation and islet damage as assessed by C-peptide release. Consistently, intraportal islet-Tx in transgenic mice with endothelial cell-specific overexpression of Del-1 resulted in a marked decrease of monocytes and platelet-monocyte aggregates in the transplanted tissues, relative to those in wild-type recipients. Mechanistically, Del-1 decreased platelet-monocyte aggregate formation, by specifically blocking the interaction between monocyte Mac-1-integrin and platelet GPIb. Our findings reveal a hitherto unknown role of Del-1 in the regulation of platelet-monocyte interplay and the subsequent heterotypic aggregate formation in the context of IBMIR. Therefore, Del-1 may represent a novel approach to prevent or mitigate the adverse reactions mediated through thrombo-inflammatory pathways in islet-Tx and perhaps other inflammatory disorders involving platelet-leukocyte aggregate formation.

Supplementary Material to this article is available online at www.thrombosis-online.com.

* I. K. and K. K. contributed equally to this work.


 
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