Volume 55, Issue 12 pp. 2939-2948
IMMUNOHEMATOLOGY

Human neutrophil antigen-3a antibodies induce neutrophil stiffening and conformational activation of CD11b without shedding of L-selectin

Tom Berthold

Tom Berthold

Institute for Immunology and Transfusion Medicine, Universitätsmedizin Greifswald, Greifswald, Germany

These authors contributed equally to this work.

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Michael Glaubitz

Michael Glaubitz

Nanostructure Group, ZIK HIKE–Center for Innovation Competence, Humoral Immune Reactions in Cardiovascular Diseases, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany

These authors contributed equally to this work.

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Stefan Muschter

Stefan Muschter

Institute for Immunology and Transfusion Medicine, Universitätsmedizin Greifswald, Greifswald, Germany

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Stefan Groß

Stefan Groß

Department of Cardiology, Universitätsmedizin Greifswald, Greifswald, Germany

DZHK–German Centre for Cardiovascular Research, Greifswald, Germany

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Raghavendra Palankar

Raghavendra Palankar

Nanostructure Group, ZIK HIKE–Center for Innovation Competence, Humoral Immune Reactions in Cardiovascular Diseases, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany

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Angelika Reil

Angelika Reil

German Red Cross Blood Service West, Hagen, Germany

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Christiane A. Helm

Christiane A. Helm

Institute of Physics, Ernst-Moritz-Arndt-University Greifswald

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Tamam Bakchoul

Tamam Bakchoul

Institute for Immunology and Transfusion Medicine, Universitätsmedizin Greifswald, Greifswald, Germany

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Hansjörg Schwertz

Hansjörg Schwertz

Institute for Immunology and Transfusion Medicine, Universitätsmedizin Greifswald, Greifswald, Germany

Lichtenberg-Professor for Experimental Hemostasis, Universitätsmedizin Greifswald

Program in Molecular Medicine, University of Utah, Salt Lake City, Utah

Department of Surgery, University of Utah, Salt Lake City, Utah

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Jürgen Bux

Jürgen Bux

Ruhr University Bochum, Bochum, Germany

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Andreas Greinacher

Corresponding Author

Andreas Greinacher

Institute for Immunology and Transfusion Medicine, Universitätsmedizin Greifswald, Greifswald, Germany

Address reprint requests to: Prof. Dr. med. Andreas Greinacher, Institut für Immunologie und Transfusionsmedizin, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany; e-mail: [email protected].Search for more papers by this author
Mihaela Delcea

Mihaela Delcea

Nanostructure Group, ZIK HIKE–Center for Innovation Competence, Humoral Immune Reactions in Cardiovascular Diseases, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany

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First published: 10 September 2015
Citations: 4

This work was supported by an unrestricted grant from the Red Cross Blood Donation Service West, Hagen, Germany; by the Land Mecklenburg-Vorpommern, Exzellenzinitiative UG 07-064, and by the Germany's Ministry of Education and Research (BMBF), Innovation Center–Humoral Immune Reactions in Cardiovascular Diseases (ZIK-HIKE) FKZ 03Z2CN11 and FKZ 03Z2CN12; by the Forschungsverbund Molekulare Medizin of the University Greifswald (FOMM 2012-01); by the Deutsche Forschungsgemeinschaft (Grant GR 2232/7-1); and by the Volkswagen Stiftung (Lichtenberg Professorship to HS).

Abstract

BACKGROUND

HNA-3a antibodies induce severe transfusion-related acute lung injury (TRALI) in which neutrophils play a major role. As neutrophil passage through the pulmonary microvasculature is a critical step in the pathogenesis of TRALI, we investigated the impact of HNA-3a antibodies on two important factors that could impair granulocyte passage through lung capillaries: the elasticity of neutrophils and the expression and activation of adhesion molecules.

STUDY DESIGN AND METHODS

The impact of HNA-3a antibodies on the elasticity of neutrophils was investigated using atomic force microscopy (AFM). Neutrophils were settled on poly-2-hydroxyethyl-methacrylate–coated glass slides before treatment with anti-HNA-3a plasma samples, control plasma, or control plasma containing formyl-methionyl-leucyl-phenylalanine (fMLP). Elasticity measurements were carried out in a temperature-controlled perfusion chamber using an atomic force microscopy (AFM) device. The impact of HNA-3a antibodies on the surface expression of total CD11b, activation of CD11b, and L-selectin (CD62L) shedding was investigated by flow cytometry. The functional impact of HNA-3a antibodies on neutrophil adhesion was assessed using fibrinogen-coated plates.

RESULTS

HNA-3a antibodies induced stiffening of neutrophils (+24%-40%; p < 0.05) to a similar extent as fMLP. This effect was blocked by treatment of neutrophils with cytochalasin D. While total surface expression of CD11b and L-selectin on neutrophils was largely unaffected, HNA-3a antibodies induced alloantigen-specific activation of CD11b (+72%-107%; p < 0.05) and increased adhesion of neutrophils to fibrinogen.

CONCLUSION

Accumulation of neutrophils in the pulmonary microvasculature during severe TRALI is likely mediated by increased rigidity and CD11b-mediated adhesion of neutrophils leading to retention of neutrophils.

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