T Cell Repertoire Development in XSCID Dogs Following Nonconditioned Allogeneic Bone Marrow Transplantation

William Vernau, Brian J. Hartnett, Douglas R. Kennedy, Peter F Moore, Paula S. Henthorn, Kenneth I. Weinberg, Peter J. Felsburg

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Dogs with X-linked severe combined immunodeficiency (XSCID) can be successfully treated by bone marrow transplants (BMT) resulting in full immunologic reconstitution and engraftment of both donor B and T cells without the need for pretransplant conditioning. In this study, we evaluated the T cell diversity in XSCID dogs 4 months to 10.5 years following BMT. At 4 months posttransplantation, when the number of CD45RA+ (naïve) T cells had peaked and plateaued, the T cells in the transplanted dogs showed the same complex, diverse repertoire as those of normal young adult dogs. A decline in T cell diversity became evident approximately 3.5 years posttransplant, but the proportion of Vβ families showing a polyclonal Gaussian spectratype still predominated up to 7.5 years posttransplant. In 2 dogs evaluated at 7.5 and 10.5 years posttransplant, >75% of the Vβ families consisted of a skewed or oligoclonal spectratype that was associated with a CD4/CD8 ratio of <0.5. The decline in the complexity of T cell diversity in the transplanted XSCID dogs is similar to that reported for XSCID patients following BMT. However, in contrast to transplanted XSCID boys who show a significant decline in their T cell diversity by 10 to 12 years following BMT, transplanted XSCID dogs maintain a polyclonal, diverse T cell repertoire through midlife.

Original languageEnglish (US)
Pages (from-to)1005-1015
Number of pages11
JournalBiology of Blood and Marrow Transplantation
Volume13
Issue number9
DOIs
StatePublished - Sep 2007

Keywords

  • Bone marrow transplants
  • Dogs
  • X-linked severe combined immunodeficiency

ASJC Scopus subject areas

  • Transplantation

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