Volume 29, Issue 12 pp. 1337-1348
Original Article

Orthotopic tracheal transplantation using human bronchus: an original xenotransplant model of obliterative airway disorder

Julien Guihaire

Julien Guihaire

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

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Ryo Itagaki

Ryo Itagaki

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

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Mandy Stubbendorff

Mandy Stubbendorff

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

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Xiaoqin Hua

Xiaoqin Hua

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

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Tobias Deuse

Tobias Deuse

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany

University of California San Francisco (UCSF) Department of Surgery, Division of Cardiothoracic Surgery, Transplant and Stem Cell Immunobiology (TSI), Lab San Francisco, CA, USA

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Sebastian Ullrich

Sebastian Ullrich

Department of Anatomy and Experimental Morphology, University Hospital Hamburg-Eppendorf, Hamburg, Germany

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Elie Fadel

Elie Fadel

Thoracic and Vascular Surgery and Heart-Lung Transplantation, Marie Lannelongue Hospital, University of Paris Sud, Le Plessis Robinson, France

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Peter Dorfmüller

Peter Dorfmüller

Department of Pathology, Marie Lannelongue Hospital, University of Paris Sud, Le Plessis Robinson, France

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Robert C. Robbins

Robert C. Robbins

Department of Cardiothoracic Surgery, Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA

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Hermann Reichenspurner

Hermann Reichenspurner

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany

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Udo Schumacher

Udo Schumacher

Department of Anatomy and Experimental Morphology, University Hospital Hamburg-Eppendorf, Hamburg, Germany

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Sonja Schrepfer

Corresponding Author

Sonja Schrepfer

TSI-Laboratory, University Heart Center Hamburg, Hamburg, Germany

Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Luebeck, Hamburg, Germany

Department of Cardiothoracic Surgery, Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA

University of California San Francisco (UCSF) Department of Surgery, Division of Cardiothoracic Surgery, Transplant and Stem Cell Immunobiology (TSI), Lab San Francisco, CA, USA

Correspondence

Sonja Schrepfer, Transplant and Stem Cell Immunobiology Lab (TSI), University Heart Center Hamburg, Martinistraße 52, Campus Research, N27, room 068, 20246 Hamburg, Germany.

Tel.: +49-40-74105-9982;

fax: +49-40-74105-9663;

e-mail: [email protected]

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First published: 10 September 2016
Citations: 5
J.G. and R.I. share first-authorship.
U.S. and S.S. share last authorship.
[Correction added on 13 October 2016 after first online publication: Author affiliations have been corrected in this version.]

Summary

Bronchiolitis obliterans syndrome (BOS) is a main cause of allograft dysfunction and mortality after lung transplantation (LTx). A better understanding of BOS pathogenesis is needed to overcome this treatment-refractory complication. Orthotopic tracheal transplantation using human bronchus was performed in Brown Norway (BN) and nude (RNU) rats. Allografts were recovered in both strains at Day 7 (BN7, n = 6; RNU7, n = 7) or Day 28 (BN28, n = 6; RNU28, n = 6). Immune response of the host against the bronchial graft was assessed. Human samples from BOS patients were used to compare with the histological features of the animal model. Obstruction of the allograft lumen associated with significant infiltration of CD3+ and CD68+ cells was observed in the BN group on Day 28. Immune response from type 1 T-helper cells against the tracheal xenograft was higher in BN animals compared to nude animals on Days 7 and 28 (P < 0.001 and P = 0.035). Xenoreactive antibodies were significantly higher at Day 7 (IgM) and Day 28 (IgG) in the BN group compared to RNU (respectively, 37.6 ± 6.5 vs. 5.8 ± 0.7 mean fluorescence, P = 0.039; and 22.4 ± 3.8 vs. 6.9 ± 1.6 mean fluorescence, P = 0.011). Immunocompetent animals showed a higher infiltration of S100A4+ cells inside the bronchial wall after 28 days, associated with cartilage damage ranging from invasion to complete destruction. In vitro expression of S100A4 by human fibroblasts was higher when stimulated by mononuclear cells (MNCs) from BN rats than from RNU (2.9 ± 0.1 vs. 2.4 ± 0.1 mean fluorescence intensity, P = 0.005). Similarly, S100A4 was highly expressed in response to human MNCs compared to stimulation by T-cell-depleted human MNCs (4.3 ± 0.2 vs. 2.7 ± 0.1 mean fluorescence intensity, P < 0.001). Obliterative bronchiolitis has been induced in a new xenotransplant model in which chronic airway obstruction was associated with immune activation against the xenograft. Cartilage infiltration by S100A4+ cells might be stimulated by T cells.

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