Abstract:
:Both conventional chimerism analysis (CCA) and lineage-specific chimerism analysis (LCA) have potential pitfalls as diagnostic means for the detection of minimal residual disease after allogeneic hematopoietic cell transplantation (aHCT). Therefore, the present study examines the results of both methods in order to determine how predictive consecutive evaluations were, with respect to the risk that the patient would relapse during post-transplant follow-up and with respect to responsiveness to immunomodulatory treatment. A total of 168 individuals with acute myeloid leukemia (AML) (n = 137) and myelo dysplastic syndrome (n = 31) were investigated with CCA and LCA at mean intervals of 24 days (range: 11-116). The median follow-up after myeloablative aHCT was 22 months (range: 4-49). Of 168 patients, 65 experienced a clinical relapse after aHCT. CCA and LCA were comparatively sensitive and specific for relapse at the intervals of chimerism testing employed in this study. Of 32 patients, 10 who were offered donor lymphocyte infusions (DLI) treatment for increasing (n = 29) or stable (n = 3) mixed chimerism (MC) achieved at least transitory CC. The observation that all patients with increasing MC relapsed despite DLI treatment (54%) or withdrawal of immune suppression (24%) indicates that novel strategies to deal with rapidly evolving relapse in AML patients, such as shortening of chimerism monitoring intervals, need to be evaluated.
journal_name
Leukemiajournal_title
Leukemiaauthors
Zeiser R,Spyridonidis A,Wäsch R,Ihorst G,Grüllich C,Bertz H,Finke Jdoi
10.1038/sj.leu.2403719subject
Has Abstractpub_date
2005-05-01 00:00:00pages
814-21issue
5eissn
0887-6924issn
1476-5551pii
2403719journal_volume
19pub_type
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