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Erschienen in: Journal of Cancer Research and Clinical Oncology 12/2015

01.12.2015 | Original Article – Clinical Oncology

Poor graft function can be durably and safely improved by CD34+-selected stem cell boosts after allogeneic unrelated matched or mismatched hematopoietic cell transplantation

verfasst von: Sebastian P. Haen, Michael Schumm, Christoph Faul, Lothar Kanz, Wolfgang A. Bethge, Wichard Vogel

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 12/2015

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Abstract

Purpose

Insufficient production of leukocytes, thrombocytes and erythrocytes after allogeneic peripheral blood stem cell transplantation (PBSCT) represents a life-threatening complication.

Methods

In 20 adult patients with poor graft function (PGF defined as transfusion-dependent platelet counts <20,000/µl, or leukocytes <1500/µl, or transfusion-dependent anemia) and variable causes of PGF after allogeneic PBSCT, immunomagnetically selected CD34+ stem cell boosts (SCB) from matched unrelated (n = 8), mismatched unrelated (n = 11) or haploidentical (n = 1) donors were applied without prior conditioning.

Results

Patients received a median of 4.6 × 106 CD34+ cells per kilogram bodyweight (1.9–9.1 × 106) and low T cell numbers (median 0.2 × 104, range 0.04–0.6 × 104). All patients showed responses in at least one hematopoietic lineage. Engraftment for platelets, leukocytes and hemoglobin was 88, 88 and 100 % after a median of 14, 13 and 18 days, respectively. With regard to the complete cohort, 90 % (n = 18) showed an increase in platelets (median 76,500/µl, range −7000 to 223,000/µl), 95 % (n = 19) had an increase in leukocytes (median 3110/µl, range 150–13,740/µl) and 90 % (n = 18) improved with regard to hemoglobin (median 1.9 g/dl, range −0.9 to 5.1 g/dl). Due to effective T cell depletion, only one patient developed graft versus host disease (GvHD, grade III) after SCB. Patients were followed for a median of 7.5 months (1–74 months) with 11 patients being alive and disease free with normalized peripheral blood counts at the end of follow-up.

Conclusions

CD34+-selected SCB are safe and effective and can durably improve PGF even in patients receiving grafts from unrelated matched or mismatched donors with low incidence of GvHD.
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Metadaten
Titel
Poor graft function can be durably and safely improved by CD34+-selected stem cell boosts after allogeneic unrelated matched or mismatched hematopoietic cell transplantation
verfasst von
Sebastian P. Haen
Michael Schumm
Christoph Faul
Lothar Kanz
Wolfgang A. Bethge
Wichard Vogel
Publikationsdatum
01.12.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 12/2015
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-015-2027-x

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