Volume 27, Issue 10 pp. 1086-1096
Original Article

Stable mixed hematopoietic chimerism permits tolerance of vascularized composite allografts across a full major histocompatibility mismatch in swine

David W. Mathes

David W. Mathes

Division of Plastic Surgery, University of Colorado, School of Medicine, Denver, CO, USA

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Mario G. Solari

Mario G. Solari

Division of Plastic Surgery, The University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

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Guy Scott Gazelle

Guy Scott Gazelle

Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Peter E. M. Butler

Peter E. M. Butler

Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Anette Wu

Anette Wu

Transplantation Biology Research Laboratory MGH-East, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Adam Nazzal

Adam Nazzal

Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Gunnlauger P. Nielsen

Gunnlauger P. Nielsen

Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Christene A. Huang

Christene A. Huang

Transplantation Biology Research Laboratory MGH-East, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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David H. Sachs

David H. Sachs

Transplantation Biology Research Laboratory MGH-East, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

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Wei Ping Andrew Lee

Wei Ping Andrew Lee

Department of Plastic Surgery, Johns Hopkins Medical Institutions, Baltimore, MD, USA

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Mark A. Randolph

Corresponding Author

Mark A. Randolph

Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

Correspondence

Mark A. Randolph MAS, Harvard Medical School, Massachusetts General Hospital, 15 Parkman Street, WAC435, Boston, MA 02114, USA.

Tel.:617-726-6943;

fax: 617-726-8998;

e-mail: [email protected]

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First published: 25 June 2014
Citations: 15

Conflicts of interest:

The authors have declared no conflicts of interest.

Summary

This study tested the hypothesis that vascularized composite allografts (VCA) could be accepted in a robust model of hematopoietic chimerism by injecting allogeneic bone marrow cells (BMC) into swine fetuses. Outbred Yorkshire sows and boars were screened to ensure the absence of the major histocompatibility (MHC) allele SLAcc of inbred MGH miniature swine and then mated. Bone marrow harvested from an SLAcc swine donor was T-cell depleted and injected intravenously into the fetuses between days 50–55 of gestation. After birth, the piglets were studied with flow cytometry to detect donor cells and mixed lymphocyte reactions (MLR) and cell-mediated lympholysis (CML) assays to assess their response to donor. Donor-matched VCAs from SLAcc donors were performed on four chimeric and two nonchimeric swine. The results showed donor cell engraftment and multilineage macrochimerism after the in utero transplantation of adult BMC, and chimeric animals were unresponsive to donor antigens in vitro. Both control VCAs were rejected by 21 days and were alloreactive. Chimeric animals accepted the VCAs and never developed antidonor antibodies or alloreactivity to donor. These results confirm that the intravascular, in utero transplantation of adult BMC leads to donor cell chimerism and donor-specific tolerance of VCAs across a full MHC barrier in this animal model.

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