Affiliation:
1. St James's Institute of Oncology Leeds Teaching Hospitals NHS Trust Leeds UK
2. NHS Blood and Transplant Barnsley UK
Abstract
AbstractCollection of peripheral blood stem cells (PBSCs) for autologous stem cell transplant (ASCT) requires mobilization from the bone marrow. There is variation in mobilization choice; during the COVID‐19 pandemic BSBMT&CT guidelines recommended using granulocyte‐colony stimulating factor (G‐CSF) alone to minimize the use of chemotherapy. We report on the impact of mobilization regimen on stem cell collection, and whether IMiD‐containing induction therapy impacts on mobilization and consequently transplant engraftment times for 83 patients undergoing ASCT at Leeds Teaching Hospitals.Cyclophosphamide plus G‐CSF (cyclo‐G) mobilization yielded more CD34+ cells (8.94 vs. 4.88 ×106/kg, p = < 0.0001) over fewer days (1.6 vs. 2.4 days, p = 0.007), and required fewer doses of salvage Plerixafor than G‐CSF only (13.6% vs. 35%, p = 0.0407). IMiD‐containing induction impaired all of these factors. CD34+ doses > 8×106/kg were more frequent with Cyclo‐G (62% vs. 11%, p = 0.0001), including for those receiving IMiD 1st line induction (50% vs. 13.3%, p = 0.0381). Note that 92.6% of those receiving IMiD‐free inductions were mobilized with Cyclo‐G.The novel agents used in modern induction regimens (e.g Daratumumab) have been shown to impair yields, increasing the importance of optimizing mobilization regimens in the first instance. Furthermore, as cellular therapies become established in the management of multiple myeloma emerging data highlights the potential benefits of stem cell top up in the management of the haematological toxicities of these therapies. Our findings support re‐adoption of Cyclo‐G as the gold standard for mobilization to optimize PBSC harvesting and ensure sufficient cells for subsequent ASCTs.
Subject
General Earth and Planetary Sciences
Reference22 articles.
1. Karakantza M. Datakindly provided from NHS Blood and Transplantregistry 2020. (Unpublished)
2. BSBMTCT COVID‐19 Vaccination Sub‐Group.BSBMT&CT recommendations for the management of adult patients and allogeneic donors during the COVID‐19 (causative agent the SARS‐CoV‐2 virus) outbreak. [Internet] Version 5; 4th December 2020 (clinical guideline). Accessed 22nd January 2023. Available from:https://bsbmtct.org/wp‐content/uploads/2020/12/BSBMTCT‐COVID‐19‐Guidelines‐5.0‐Dec‐2020_final.pdf
3. Randomized comparison of granulocyte colony-stimulating factor versus granulocyte-macrophage colony-stimulating factor plus intensive chemotherapy for peripheral blood stem cell mobilization and autologous transplantation in multiple myeloma