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Journal of Virology, October 1998, p. 7733-7744, Vol. 72, No. 10
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Control of Cytomegalovirus in Bone Marrow
Transplantation Chimeras Lacking the Prevailing Antigen-Presenting
Molecule in Recipient Tissues Rests Primarily on Recipient-Derived
CD8 T Cells
Mariagabriela
Alterio de
Goss,
Rafaela
Holtappels,
Hans-Peter
Steffens,
Jürgen
Podlech,
Peter
Angele,
Liane
Dreher,
Doris
Thomas, and
Matthias J.
Reddehase*
Institute for Virology, Johannes Gutenberg
University, 55101 Mainz, Germany
Received 4 May 1998/Accepted 19 June 1998
Cytomegalovirus (CMV) infection during the transient
immunodeficiency after bone marrow transplantation (BMT) develops into disease unless antiviral CD8 T cells are restored in due course. Histoincompatibility between donor and recipient is associated with
increased risk. Complications may include a rejection response against
the foreign major histocompatibility complex (MHC) antigens and a lack
of antiviral control resulting from a misfit between donor-derived T
cells and the antigenic viral peptides presented in recipient tissues.
Here we have established a murine model of CMV disease after
experimental BMT performed across a single MHC class I disparity.
Specifically, BALB/c bone marrow cells expressing the prevailing
antigen-presenting molecule Ld were transplanted into the
Ld gene deletion mutant BALB/c-H-2dm2, an
experimental setting that entails a selective risk of host-versus-graft but not graft-versus-host response. The reconstituted T-cell population proved to be chimeric in that it consisted of Ld-positive
donor-derived and Ld-negative recipient-derived cells.
Pulmonary infiltrates did not include cytolytic T cells directed
against Ld. This finding implies that the infection did not
trigger a host-versus-graft response. Notably, upon adoptive transfer,
donor-derived CD8 T cells preferentially protected tissues of donor
genotype, whereas recipient-derived CD8 T cells protected tissues of
either genotype. We infer from these data that the focus on
immunodominant antigens presented by Ld within the donor
cell population distracted the donor T cells from protecting recipient
tissues and that protection in the chimeras was therefore primarily
based on recipient T cells. As a consequence, T-cell chimerism after
BMT should give a positive prognosis with respect to control of CMV.
*
Corresponding author. Mailing address: Institute for
Virology, Johannes Gutenberg University, Hochhaus am Augustusplatz,
55101 Mainz, Germany. Phone: 49-6131-173650. Fax: 49-6131-395604. E-mail: Matthias.Reddehase{at}uni-mainz.de

Present address: Cra. 40 # 155-62, Santafé de Bogotá,
Colombia.
Journal of Virology, October 1998, p. 7733-7744, Vol. 72, No. 10
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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