Abstract

CD34+ immunomagnetic positive selection allows for CD34+ hematopoietic progenitors separation from CD3+ lymphocytes subsets, usually from an apheresis product collected from a previously mobilized donor. This T-cell depleted stem cell graft is primarily intended for rare cases (around 2% of allotransplanted patients in France) of severe, persistent, symptomatic bi- or tri-cytopenia post-allotransplantation, in order to allow for hematologic reconstitution without increasing the risk of GvHD occurrence. Although semi-manual and complex, the process is of sufficient robustness to consistently generate a cellular product with distinctive features and specifications, based on iterative in-process quality controls, that are discussed within these guidelines.

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