Autografting with CD34+ peripheral blood stem cells: retained engraftment capability and reduced tumour cell content

The efficacy of an immunomagnetic purging method and the Isolex 300 devices were assessed for selecting CD34+ cells from leukapheresis products of 29 patients with non-Hodgkin's lymphoma (NHL), 39 with multiple myeloma and 34 with breast cancer. The mean purity of the CD34+ cell population was...

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Hauptverfasser: Voso, Maria Teresa (VerfasserIn) , Hohaus, Stefan (VerfasserIn) , Moos, Marion (VerfasserIn) , Pförsich, Margit (VerfasserIn) , Cremer, Friedrich Walter (VerfasserIn) , Schlenk, Richard Friedrich (VerfasserIn) , Martin, Simona (VerfasserIn) , Hegenbart, Ute (VerfasserIn) , Goldschmidt, Hartmut (VerfasserIn) , Haas, Rainer (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: [1999]
In: British journal of haematology
Year: 1999, Jahrgang: 104, Heft: 2, Pages: 382-391
ISSN:1365-2141
DOI:10.1046/j.1365-2141.1999.01171.x
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1046/j.1365-2141.1999.01171.x
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-2141.1999.01171.x
Volltext
Verfasserangaben:Maria Teresa Voso, Stefan Hohaus, Marion Moos, Margit Pförsich, Friedrich W. Cremer, Richard F. Schlenk, Simona Martin, Ute Hegenbart, Hartmut Goldschmidt, Rainer Haas

MARC

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520 |a The efficacy of an immunomagnetic purging method and the Isolex 300 devices were assessed for selecting CD34+ cells from leukapheresis products of 29 patients with non-Hodgkin's lymphoma (NHL), 39 with multiple myeloma and 34 with breast cancer. The mean purity of the CD34+ cell population was 93.6% and the mean recovery was 67.7%. Following enzymatic cleavage by chymopapain the expression of Thy-1 and Leu-8 was significantly reduced without affecting haematological recovery. The population of selected CD34+ cells of 4/8 patients with follicular lymphoma became PCR-negative. A 2.5 log reduction of tumour cells could be achieved in four patients with multiple myeloma as shown by a quantitative PCR assay. There were no tumour cells detectable in any of the 19 CD34+ cell preparations of patients with breast cancer. In 64 patients who received 94 cycles of high-dose therapy, a mean number of 4.7 × 106 CD34+ cells/kg were autografted. The time needed for platelet reconstitution was different when a comparison was made with 156 patients, who had received unmanipulated leukapheresis products (10 v 12 d, P = 0.006). No significant differences with regard to neutrophil recovery were noted. Five patients had a graft failure. Two of them died (on day 78 and 88 following PBSCT), and three patients were rescued with unmanipulated back-up transplants. In conclusion, the immunomagnetic selection of CD34+ cells provides autografts with reduced tumour cell content and an engraftment ability similar to that of unmanipulated autografts. 
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