BACKGROUND: A combination of chemotherapy plus granulocyte-colony-stimulating factor (G-CSF) (chemomobilization) is commonly used to mobilize CD34+ cells to circulation. Plerixafor, a chemokine CXCR4 antagonist, increases the mobilization of CD34+ cells and may also have effect on graft composition. STUDY DESIGN AND METHODS: We have analyzed lymphocyte subsets in grafts collected on the next morning after plerixafor injection in 13 chemomobilized patients with non-Hodgkin's lymphoma (NHL) mobilizing poorly. As controls we had the first leukapheresis products from 11 NHL patients mobilized with chemotherapy plus G-CSF. The analyses were performed from cryopreserved apheresis products. RESULTS: The median counts of both total CD3+ T cells and natural killer (NK) cells (CD3-CD16/56+) in the graft were significantly higher in plerixafor-treated group compared to the control group. Both helper T-lymphocytes (CD3+CD4+) and suppressor T-lymphocytes (CD3+CD8+) were significantly increased in the plerixafor-treated group so that CD4+/CD8+ ratio in the graft did not differ between the groups. CD19+ cells were evident only at very small amounts in few patients in both groups, and the CD34+ cell content of the graft did not differ between the groups. Engraftment after high-dose therapy was comparable between the groups. CONCLUSION: Plerixafor added to chemomobilization in poor mobilizers seems to mobilize more T cells and NK cells than chemomobilization. Larger patient numbers and longer follow-up is needed in regard to evaluate posttransplant complications and risk of relapse in patients receiving plerixafor due to poor mobilization.
BACKGROUND: A combination of chemotherapy plus granulocyte-colony-stimulating factor (G-CSF) (chemomobilization) is commonly used to mobilize CD34+ cells to circulation. Plerixafor, a chemokine CXCR4 antagonist, increases the mobilization of CD34+ cells and may also have effect on graft composition. STUDY DESIGN AND METHODS: We have analyzed lymphocyte subsets in grafts collected on the next morning after plerixafor injection in 13 chemomobilized patients with non-Hodgkin's lymphoma (NHL) mobilizing poorly. As controls we had the first leukapheresis products from 11 NHLpatients mobilized with chemotherapy plus G-CSF. The analyses were performed from cryopreserved apheresis products. RESULTS: The median counts of both total CD3+ T cells and natural killer (NK) cells (CD3-CD16/56+) in the graft were significantly higher in plerixafor-treated group compared to the control group. Both helper T-lymphocytes (CD3+CD4+) and suppressor T-lymphocytes (CD3+CD8+) were significantly increased in the plerixafor-treated group so that CD4+/CD8+ ratio in the graft did not differ between the groups. CD19+ cells were evident only at very small amounts in few patients in both groups, and the CD34+ cell content of the graft did not differ between the groups. Engraftment after high-dose therapy was comparable between the groups. CONCLUSION:Plerixafor added to chemomobilization in poor mobilizers seems to mobilize more T cells and NK cells than chemomobilization. Larger patient numbers and longer follow-up is needed in regard to evaluate posttransplant complications and risk of relapse in patients receiving plerixafor due to poor mobilization.
Authors: M Mohty; K Hübel; N Kröger; M Aljurf; J Apperley; G W Basak; A Bazarbachi; K Douglas; I Gabriel; L Garderet; C Geraldes; O Jaksic; M W Kattan; Z Koristek; F Lanza; R M Lemoli; L Mendeleeva; G Mikala; N Mikhailova; A Nagler; H C Schouten; D Selleslag; S Suciu; A Sureda; N Worel; P Wuchter; C Chabannon; R F Duarte Journal: Bone Marrow Transplant Date: 2014-03-31 Impact factor: 5.483
Authors: Ivana N Micallef; Patrick J Stiff; Auayporn P Nademanee; Richard T Maziarz; Mitchell E Horwitz; Edward A Stadtmauer; Jonathan L Kaufman; John M McCarty; Rita Vargo; Peter D Cheverton; Martin Struijs; Brian Bolwell; John F DiPersio Journal: Biol Blood Marrow Transplant Date: 2018-02-02 Impact factor: 5.742