Lack of correlation between an assay used to determine early marrow allograft rejection and long-term chimerism after murine allogeneic bone marrow transplantation: Effects of marrow dose

Crystal Y. Koh, Lisbeth A. Welniak, William J. Murphy

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The acute rejection of bone marrow (BM) allografts by host effectors can occur within a short period after BM transplantation (BMT) in lethally irradiated mice. Common assays used to ascertain engraftment/resistance involve measuring the growth of granulocyte/monocyte progenitors (colony-forming unit-granulocyte-macrophage) in vitro or splenocyte proliferation assessed by radioisotope incorporation in vivo 5 to 8 days after BMT. However, the correlation of the long-term outcome of BMT with the kinetics of recovery by using the dose of allogeneic BM cells (BMCs) that leads to early rejection as determined by the in vitro assessment has not been extensively studied. Thus, to investigate whether the early rejection of donor BMCs is an indication of a long-term engraftment failure, C57BL/6 (H2b) mice were lethally irradiated and transplanted with various doses of BALB/c (H2d) BMCs. The short-term engraftment of donor precursors (colony-forming unit-granulocyte-macrophage), the kinetics of hematopoietic cell recovery, the extent of donor chimerism, and the proportion of the recipients with long-term survival were determined. The results show that the kinetics and extent of hematopoietic cell recovery were significantly delayed in mice receiving limiting doses of BMCs that were rejected or severely resisted at day 8 after BMT. However, a proportion of these mice survived up to 98 days after BMT with mixed chimerism or donor chimerism. This study demonstrates that early rejection of BM precursors, as assessed by measurement of myeloid progenitors in the spleen after BMT, does not always correlate with the long-term outcome of the marrow allograft and that significant variability is inherent in the extent of chimerism when threshold amounts of BMCs are used.

Original languageEnglish
Pages (from-to)252-259
Number of pages8
JournalBiology of Blood and Marrow Transplantation
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 2005

Keywords

  • Acute rejection
  • Bone marrow transplantation
  • CFU-GM
  • Long-term chimerism

ASJC Scopus subject areas

  • Transplantation

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