This randomized phase II trial compares how well adding XMO2 Filgrastim (Granix) to melphalan before a stem cell transplant works in treating patients with multiple myeloma. Chemotherapy drugs, such as melphalan, are given to prepare the bone marrow for the stem cell transplant. Giving colony-stimulating factors, such as XMO2 Filgrastim (Granix), may help multiple myeloma cells move from the patient's bone marrow to the blood where they may be more sensitive to treatment with melphalan. It is not yet known whether adding XMO2 Filgrastim (Granix) to melphalan before a stem cell transplant will work better than melphalan alone in treating multiple myeloma
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
90
Washington University School of Medicine
St Louis, Missouri, United States
Number of Participants With Complete Response or Stringent Complete Response
Complete response (CR) requires all of the following: * Disappearance of monoclonal protein by both protein electrophoresis and immunofixation studies from the blood and urine * \<5% plasma cells in the bone marrow * Disappearance of soft tissue plasmacytomas Stringent complete response (sCR) requires all of the following: * CR as defined above * Normal free light chain ratio * Absence of clonal cells in the bone marrow by immunohistochemistry or immunofluorescence
Time frame: Day +100
Number of Participants With Adverse Events
-Assessed by NCI Common Terminology Criteria for Adverse Events (CTCAE) version 4.0
Time frame: Up through Day 30
Number of Participants With Overall Response
Overall response rate=CR+sCR+VGPR+PR Complete response (CR), disappearance of monoclonal protein from the blood \& urine and \<5% plasma cells in bone marrow \&disappearance of soft tissue plasmacytomas Stringent complete response (sCR), CR \& normal free light chain ratio \& absence of clonal cells in bone marrow by immunohistochemistry or immunofluorescence Very good partial response (VGPR), serum and urine monoclonal protein detectable by immunofixation but not on electrophoresis OR \> 90% reduction in serum monoclonal protein with urine monoclonal protein \< 100 mg per 24 hours and if present, \> 50% reduction in the size of soft tissue plasmacytomas Partial response (PR), \> 50% reduction in the level of the serum monoclonal protein \& reduction in urine monoclonal protein \& \> 50% reduction in the size of soft tissue plasmacytomas \& if serum and urine monoclonal protein are unmeasurable and serum free light chain is unmeasurable, a \> 50% reduction in plasma cells is required
Time frame: Up to 2 years
Overall Survival as Measured by Number of Participants Alive at Last Follow-up
OS is defined as the duration from the time of transplant Day 0 to death or last follow-up.
Time frame: Up to 2 years
Progression-free Survival as Measured by Number of Participants Without Disease Progression at Last Follow-up
PFS is defined as the duration from time of transplant Day 0 to time of first progression/clinical relapse, death, or the date the patient was last known to be in remission
Time frame: Up to 2 years
Number of Participants With Neutrophil Engraftment
Neutrophil engraftment is defined as ANC ≥ 0.5 × 10\^9/L × 3 consecutive daily assessments. The first of 3 consecutive days for which ANC ≥ 0.5 × 109/L will be recorded as the date of neutrophil engraftment. Time to neutrophil engraftment will be calculated as the time from the date of the ASCT to the date of neutrophil engraftment.
Time frame: Up to Day 30
Number of Participants With Platelet Engraftment
Platelet engraftment is defined as an untransfused platelet measurement \>20,000/mm3 × 3 consecutive daily assessments. The first of 3 consecutive days for which the untransfused platelet measurement is \>20,000/mm3 will be recorded as the date of platelet engraftment. Time to platelet engraftment will be calculated as the time from receiving the date of ASCT to the date of platelet engraftment. Untransfused is defined as no transfusions within 7 days.
Time frame: Up to Day 100
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