[Efficacy of plerixafor in autologous peripheral blood stem cell collection]

Failure of autologous peripheral blood stem cell collection (PBSCH) can affect the treatment modality for patients with hematological malignancies. The clinical efficacy of plerixafor in PBSCH was analyzed in our institution. The medical records of 61 patients were retrospectively reviewed. The use of plerixafor was determined according to the CD34⁺ cell count in the peripheral blood (PB CD34⁺) on day 4 of G-CSF administration and patients' backgrounds. A total of 47 patients received G-CSF plus plerixafor: 31 with multiple myeloma, 8 with AL amyloidosis or POEMS syndrome, and 8 with non-Hodgkin lymphoma. The median fold increase in PB CD34⁺ following the first dose of plerixafor was 7.18 times. The median number of collected CD34⁺ cells on day 5 was 4.1×10⁶/kg and 5.3×10⁶/kg in total. Among the 47 patients, 44 (93.6%) yielded the minimum required cell collection of 2.0×10⁶/kg within an average of 1.3 days. Plerixafor enables rapid and efficient mobilization, and sufficient numbers of CD34⁺ cells were successfully collected.