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- W2523348044 abstract "8142 Background: In a recently published trial, the majority of MM pts (71.6%) who were mobilized with plerixafor plus G prior to autoT, collected > 6 × 106CD34+ cells/kg in ≤ 2 apheresis procedures, vs. 34.4% of pts who were mobilized with G and placebo (DiPersio et al, Blood 113 (23):5720-5726, 2009). We set out to assess the efficacy of Cy plus G as mobilization therapy in a similar pt population, treated at the City of Hope National Medical Center. Methods: 121 MM pts were treated on sequential tandem autoT protocols. Pts received 1.5 g/m2 of Cy followed by G at 10 microgram/kg, daily through completion of their apheresis procedures. Pts underwent consecutive leukapheresis starting on day 10 and continued until a minimum of 4 × 106 CD34+ cells/kg (up to 10 × 106 CD34+ cells/kg) were collected. Results: The median age was 54.4 years (range, 29.7-66.1). Pts were mobilized within 7.4 months from their diagnosis of MM (range, 1.3-55.3), following a median of 2 prior treatment regimens (1-8). Twenty-four percent of pts received prior radiation. The median number of days to collect 4 × 106 CD34+ cells/kg, and 6 × 106 CD34+ cells/kg were 1 (1-16), and 2 (1-16). The cumulative total for CD34+ cells/kg collected was 9.98 × 106 (2.55-35.79), requiring 3 aphereses (1-16). Neutrophil engraftment was reached in 11 days (1-16) after first, and 10 days (8-43) after the second autoT. Platelet independence was achieved by day 13 (0-71) and 12 (0-44), after the first and second autoTs. Patients who have undergone apheresis < 7 months from diagnosis were 2.6 times (CI: 1.14-5.95) more likely to reach a yield of 6 × 106 CD34+ cells/kg within the first 1-2 days (p = 0.02). Sixty-seven percent of Cy-G mobilized pts reached a yield of 6 × 106 CD34+/kg in 2 days. Conclusions: CD34+ cell yield following Cy-G mobilization in this retrospective exploratory analysis is comparable to what was reported following plerixafor-G mobilization. We suggest reserving plerixafor for pts with substantial delay between diagnosis and apheresis, and for those failing Cy-G mobilization. Author Disclosure Employment or Leadership Position Consultant or Advisory Role Stock Ownership Honoraria Research Funding Expert Testimony Other Remuneration Amgen" @default.
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- W2523348044 date "2010-05-20" @default.
- W2523348044 modified "2023-09-26" @default.
- W2523348044 title "Is low-dose cyclophosphamide (Cy) plus G-CSF (G) mobilization as effective as plerixafor plus G in multiple myeloma (MM) patients (pts) who are candidates for tandem autologous transplants (autoT)?" @default.
- W2523348044 doi "https://doi.org/10.1200/jco.2010.28.15_suppl.8142" @default.
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