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Mobilization of hematopoietic stem cells with lenograstim in multiple myeloma patients: Prospective multicenter observational study (KMM122).

Cancer Medicine 2023 March 24
BACKGROUND: Current guidelines recommend using filgrastim or tbo-filgrastim to mobilize hematopoietic progenitor cells in an autologous setting. However, previous studies have suggested other forms of granulocyte colony-stimulating factor (G-CSF) are equally efficacious, possibly with fewer leukaphereses required. Thus, we prospectively studied the efficacy of lenograstim, a glycosylated recombinant form of G-CSF, in multiple myeloma (MM) patients.

METHODS: From November 2011 to January 2020, 98 MM patients undergoing autologous stem cell transplant (ASCT) from five academic centers in Korea were enrolled. Patients were mobilized with subcutaneous lenograstim (Neutrogin®) with fixed doses of 10 μg/kg for 4 days.

RESULTS: Most of the patients ( N  = 90, 91.8%) achieved at least the targets of 2 × 106 CD34+ cells/kg body weight, and more than half of MM patients ( N  = 57, 58.2%) reached a target of 5 × 106 CD34+ cells/kg body weight. The mobilization failure rate was 8.2% ( N  = 8). The median number of CD34 + cell/kg using G-CSF only was 5.25 × 106 /kg (range 0.49-13.47). Adverse events included transfusion (TF, N  = 53, 54.1%), bone pain ( N  = 6, 6.1%), fever ( N  = 2, 2.0%), and gastrointestinal troubles ( N  = 2, 2.0%). There were no grade 3 or 4 adverse events during mobilization. Body surface area (BSA) at mobilization and platelet TF were factors associated with CD34+ collection. Most patients achieved neutrophil ( N  = 93, 98.9%) and platelet ( N  = 89, 95.7%) engraftment.

CONCLUSION: Lenograstim can safely and effectively mobilize stem cells in MM autologous settings.

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