Immunomagnetic selection of CD34+peripheral blood stem cells for autografting in patients with breast cancer

Contamination of transplants with tumour cells may contribute to relapse after peripheral blood stem cell transplantation (PBSCT). We studied the feasibility of CD34+ cell selection from blood-derived autografts obtained following G-CSF-supported cytotoxic chemotherapy in a group of 25 patients with...

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Main Authors: Hohaus, Stefan (Author) , Pförsich, Margit (Author) , Martin, Simona (Author) , Abdallah Khalafallah, Alhossain (Author) , Lin, Yung Sheng (Author) , Funk, Liane (Author) , Voso, Maria Teresa (Author) , Kaul, Sepp (Author) , Schmid, Hans (Author) , Wallwiener, Diethelm (Author) , Haas, Rainer (Author)
Format: Article (Journal)
Language:English
Published: 1997
In: British journal of haematology
Year: 1997, Volume: 97, Issue: 4, Pages: 881-888
ISSN:1365-2141
DOI:10.1046/j.1365-2141.1997.1272941.x
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1046/j.1365-2141.1997.1272941.x
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-2141.1997.1272941.x
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Author Notes:Stefan Hohaus, Margit Pförsich, Simona Murea, Alhossain Abdallah, Yung-Sheng Lin, Liane Funk, Maria Teresa Voso, Sepp Kaul, Hans Schmid, Diethelm Wallwiener, Rainer Haas

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520 |a Contamination of transplants with tumour cells may contribute to relapse after peripheral blood stem cell transplantation (PBSCT). We studied the feasibility of CD34+ cell selection from blood-derived autografts obtained following G-CSF-supported cytotoxic chemotherapy in a group of 25 patients with breast cancer (10 with high-risk stage II/III and 15 with stage IV without bone or bone marrow involvement). Using immunomagnetic beads (Isolex 300 SA, Baxter) CD34+ cells were enriched and released by chymopapain resulting in a median purity of 95% (range 82-99%) and a median recovery of 80% (range 27-132%). The enrichment procedure did not change the proportion of CD34+ subsets coexpressing HLA-DR, CD38 and Thy-1, while L-selectin was removed from the cell surface following selection. Using a sensitive immunocytological technique with a cocktail of epithelial-specific antibodies (anti-cytokeratin 8, 18 and 19; HEA125; BM7 and BM8), five leukaphereses products contained epithelial cells, whereas the selected CD34+ cell fraction was free of tumour cells. A neutrophil count of 0.5×109/l and a platelet count of 20×109/l was reached after a median time of 14 and 10 d following 40 high-dose chemotherapy (HDC) cycles. Our results indicate that immunomagnetic selection of CD34+ cells yields highly purified autografts devoid of tumour cells whereas the engraftment ability of the progenitor and stem cells is fully retained. 
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