Acute Myeloid Leukemia Clinical Trial
Official title:
Phase I/II Trial of High-Dose Post-Transplant Cyclophosphamide, Bortezomib, and Sitagliptin for the Prevention of Graft-versus-Host Disease Following Allogeneic Hematopoietic Stem Cell Transplantation
This is an open label Phase I-II study to determine the safe doses of bortezomib, sitagliptin, and PTCy (Phase I) with expansion into a phase II trial to determine efficacy in improving survival.
Determine the safe doses of bortezomib, sitagliptin, and PTCy for use in expansion into a phase II trial. This is effectively the maximum tolerated dose of the drugs tested in a 3+3 design in a limited phase I portion. Phase I requires a maximum of 18 patients. Determine the efficacy of sitagliptin, bortezomib, and PTCy in improving the survival free of grade II-IV acute GVHD at day +100 from an expected 65% to 80% or more. This portion uses a Simon minimax two-stage design, testing the null hypothesis H0: p0 < 0.65 versus the alternative hypothesis H1: p1 ≥ 0.8, where p is the probability of being alive and without grade II-IV acute GVHD at day 100 after transplantation. Using a minimax optimal stage design with a one-sided type I error set to 0.05, and a type II error rate set to 0.2 (power 80%). In the first stage, 31 evaluable patients will be entered. If 20 or fewer are alive without acute grade II-IV GVHD (i.e., 11 or more develop acute grade II-IV GvHD) by day +100, the study will be stopped in favor of the null hypothesis. On the other hand, if more than 20 are alive without grade II-IV acute GVHD by day +100, and additional 24 patients will be enrolled for a total of 55 evaluable patients. In the final analysis, if more than 41 remain alive free of grade II-IV acute GVHD (i.e., only 14 or less have developed acute grade II-IV acute GVHD by day +100), the null hypothesis will be rejected, and will conclude that the combination used for prevention of moderate to severe GVHD is worthy of further study. ;
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