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Meloxicam and Filgrastim for Mobilization of Autologous Peripheral Blood Stem Cells in Patients with Multiple Myeloma

ABSTRACT: Meloxicam and Filgrastim for Mobilization of Autologous Peripheral Blood Stem Cells in Patients with Multiple Myeloma

PROVIDER: PRJNA729492 | ENA |

REPOSITORIES: ENA

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Project description:Autologous hematopoietic stem cell transplantation (ASCT) improves survival in multiple myeloma (MM). However, up to 30% of MM patients are unable to collect optimal numbers of peripheral blood (PB) CD34+ hematopoietic stem and progenitor cells (HSPCs) with standard G-CSF mobilization. Motixafortide is a novel cyclic-peptide CXCR4 inhibitor with extended receptor occupancy and enhanced in-vivo activity. The GENESIS Trial is a prospective, phase III, double-blind, placebo-controlled, international, multicenter, superiority trial with 122 adult patients randomized (2:1) to motixafortide+G-CSF or placebo+G-CSF for HSPC mobilization for ASCT in MM (NCT03246529). The primary endpoint of the study was met, with motixafortide+G-CSF enabling 92.5% of patients to collect ≥6x106 CD34+ cells/kg within 2 apheresis procedures versus 26.2% with placebo+G-CSF (p<0.0001). A key, prespecified secondary endpoint was also met, with motixafortide+G-CSF enabling 88.8% of patients to collect ≥6x106 CD34+ cells/kg in 1 apheresis versus 9.5% with placebo+G-CSF (p<0.0001). Motixafortide+G-CSF was safe and well-tolerated, with the most common treatment-emergent adverse events observed being transient, Grade 1/2 injection site reactions (pain: 50%, erythema: 27.5%, pruritis: 21.3%). In addition, extended immunophenotyping and single-cell transcriptional profiling were performed on CD34+ HSPCs mobilized on the GENESIS Trial, as well as a contemporaneous MM cohort undergoing plerixafor+G-CSF mobilization for ASCT and 3 cohorts of allogeneic HSPC donors undergoing single-agent mobilization with motixafortide, plerixafor or G-CSF alone. Motixafortide+G-CSF resulted in a 10.5-fold increase in primitive HSPCs collected versus placebo+G-CSF (p<0.0001); and significantly greater numbers of early stem and progenitors versus both placebo+G-CSF (p<0.0001) and plerixafor+G-CSF (p=0.0327). Motixafortide also preferentially mobilized HSPC subsets with upregulated gene expression pathways associated with enhanced self-renewal, regeneration and quiescence (EGF, NFB/TNF and HBO1). In conclusion, motixafortide+G-CSF mobilized significantly greater CD34+ HSPC numbers within 2 apheresis procedures versus placebo+G-CSF. Motixafortide also preferentially mobilized primitive stem and early progenitor cells with unique transcriptional profiles versus plerixafor and G-CSF.

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Meloxicam and Filgrastim for Mobilization of Autologous Peripheral Blood Stem Cells in Patients with Multiple Myeloma

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