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Stable trichimerism after marrow grafting from 2 DLA-identical canine donors and nonmyeloablative conditioning

Identifieur interne : 001630 ( Main/Exploration ); précédent : 001629; suivant : 001631

Stable trichimerism after marrow grafting from 2 DLA-identical canine donors and nonmyeloablative conditioning

Auteurs : Scott S. Graves ; William Hogan ; Christian S. Kuhr ; Razvan Diaconescu ; Michael A. Harkey ; George E. Georges ; George E. Sale ; Eustacia Zellmer ; Szczepan Baran ; Christoph Jochum ; Brad Stone [États-Unis] ; Rainer Storb

Source :

Blood [ 0006-4971 ] ; 2007.

RBID : PMC:1896124

Abstract

Although hematopoietic cell transplantation (HCT) is generally accomplished using a single donor, multiple donors have been used to enhance the speed of engraftment, particularly in the case of umbilical cord blood grafts. Here we posed the question in the canine HCT model whether stable dual-donor chimerism could be established using 2 DLA-identical donors. We identified 8 DLA-identical littermate triplets in which the marrow recipients received 2 Gy total body irradiation followed by marrow infusions from 2 donors and postgrafting immunosuppression. All 8 dogs showed initial “trichimerism,” which was sustained in 5 dogs, while 2 dogs rejected one of the allografts and remained mixed chimeras, and 1 dog rejected both allografts. Immune function in one trichimeric dog, as tested by mixed leukocyte culture response and antibody response to sheep red blood cells, was found to be normal. Five dogs received kidney grafts from one of their respective marrow donors at least 6 months after HCT without immunosuppressive drugs, and grafts in 4 dogs are surviving without rejection. In summary, following nonmyeloablative conditioning, simultaneous administration of marrow grafts from 2 DLA-identical littermates could result in sustained trichimerism, and immunologic tolerance could include a kidney graft from one of the marrow donors.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1896124

DOI: 10.1182/blood-2007-02-071282
PubMed: 17369487
PubMed Central: 1896124

Affiliations:

Le document en format XML

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<author><name sortKey="Graves, Scott S" sort="Graves, Scott S" uniqKey="Graves S" first="Scott S." last="Graves">Scott S. Graves</name>
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<author><name sortKey="Hogan, William" sort="Hogan, William" uniqKey="Hogan W" first="William" last="Hogan">William Hogan</name>
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Stable trichimerism after marrow grafting from 2 DLA-identical canine donors and nonmyeloablative conditioning

Stable trichimerism after marrow grafting from 2 DLA-identical canine donors and nonmyeloablative conditioning

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