Transient Mixed Chimerism after Stem Cell Transplantation Can Induce Durable Molecular Complete Remissions in Chronic Myelogenous Leukemia

Three patients with Ph1 (+), BCR/ABL+ chronic myelogenous leukemia were allografted, two with unrelated compatible placental blood cells and one from an HLA compatible sibling. The three patients engrafted successfully, achieved mixed chimerism and all cleared the BCR/ABL fusion transcript. Despíte...

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Bibliographic Details
Published in:Blood 2006-11, Vol.108 (11), p.5350-5350
Main Authors: Ruiz-Arguelles, Guillermo J., Gomez-Almaguer, David, Ruiz-Delgado, Guillermo J., del Carmen Tarin-Arzaga, Luz
Format: Article
Language:English
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Summary:Three patients with Ph1 (+), BCR/ABL+ chronic myelogenous leukemia were allografted, two with unrelated compatible placental blood cells and one from an HLA compatible sibling. The three patients engrafted successfully, achieved mixed chimerism and all cleared the BCR/ABL fusion transcript. Despíte the fact that the three patients lost the partial chimerism, they have remained in complete molecular remissions 7 months, fourteen months and five years after the allografts. It is possible that the iatrogenic induction of a transient chimerism and in turn of a transient graft versus leukemia effect, might have a role in the induction of the sustained molecular remission of these three individuals with CML despite the fact that the three patients lost the graft; however other possible explanations can be offered. A longer follow up of the patients is mandatory to further clarify these observations.
ISSN:0006-4971
1528-0020
DOI:10.1182/blood.V108.11.5350.5350