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Journal Article
Review
How to manage poor mobilisers.
Transfusion and Apheresis Science 2024 April 19
Autologous hematopoietic progenitor cell transplantation (ASCT) has been used for more than five decades to treat malignant and non-malignant diseases. Successful engraftment after high-dose chemotherapy relies on the ability to collect sufficient CD34 + hematopoietic progenitor cells (HPCs), typically from peripheral blood after mobilization. Commonly, either granulocyte colony-stimulating factor (G-CSF) alone as a single agent (i.e. steady-state mobilization) or G-CSF after chemotherapy is administered to collect adequate numbers of HPCs (minimum ≥2 × 106 CD34 + cells/kg for one ASCT; optimal up to 5 × 106 CD34 + cells/kg). However, a significant proportion of patients fail successful HPC mobilization, which is commonly defined as a CD34+ cell count below 10-15/µL after at least 4 days of 10 µg/kg b.w. G-CSF alone, or after chemo-mobilization in combination with 5-10 µg/kg b.w. G-CSF. In these situations plerixafor, a chemokine receptor inhibitor (CXCR4) can be used to enhance HPC collection in patients with multiple myeloma and malignant lymphoma whose cells mobilize poorly. Risk factors for poor mobilization have been evaluated and several strategies (e.g. plerixafor to rescue the mobilization approach or pre-emptive use) have been suggested to optimize mobilization, especially in patients at risk. This manuscript discusses the risk factors of poor CD34+ mobilization and summarizes the current strategies to optimize mobilization and HPC collection.
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