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A Randomized, Multicenter, Phase III Trial of Tacrolimus / Methotrexate Versus Post-Transplant Cyclophosphamide / Tacrolimus / Mycophenolate Mofetil in Non-Myeloablative / Reduced Intensity Conditioning Allogeneic Peripheral Blood Stem Cell Transplantation (BMT CTN #1703; Progress III); Companion Study: Microbiome and Immune Reconstitution in Cellular Therapies and Hematopoietic Stem Cell Transplantation (BMT CTN #1801; Mi-Immune)

Cancer Type
Myelodysplastic Syndromes (MDS)
Trial Phase
Phase III
18 Years and older, Male and Female
Study Type
Protocol IDs
BMTCTN1703/1801 (primary)
Study Sponsor
Medical College of Wisconsin


1703: The study is designed as a randomized, phase III, multicenter trial comparing two acute graft-versus-host disease (aGVHD) prophylaxis regimens: tacrolimus / methotrexate (Tac / MTX) versus post-transplant cyclophosphamide / tacrolimus / mycophenolate mofetil (PTCy / Tac / MMF) in the setting of reduced intensity conditioning (RIC) allogeneic peripheral blood stem cell (PBSC) transplantation. 1801: The goal of this protocol is to test the primary hypothesis that the engraftment stool microbiome diversity predicts one-year non-relapse mortality in patients undergoing reduced intensity allogeneic HCT.


1703: Graft-versus-Host Disease (GVHD) is a complication that affects many hematopoietic stem cell transplant (HSCT) patients; it occurs when the new cells from a transplant attack the recipient's body. The current standard GVHD prophylaxis regimen for patients with hematologic malignancies undergoing HSCT involves a combination of immunosuppressive agents given for the first 6 months after transplant. The standard strategy of Tacrolimus/Methotrexate will be used as a control arm in comparison to one other treatment plan utilizing Tacrolimus/Mycophenolate Mofetil/Post-Transplant Cyclophosphamide. Study participants will receive an infusion of mobilized peripheral blood stem cell grafts on both arms. Study participants will be randomized to one of these two treatment arms. 1801: A relationship between the intestinal microbiota and graft-versus-host disease (GVHD) has long been appreciated but is still not well understood. Mice transplanted in germ-free conditions or treated with gut-decontaminating antibiotics developed less severe GVHD. Clinical studies initially suggested a benefit from near-total bacterial decontamination, but later showed no clear benefit and this approach was discontinued in the early 1990s. Partial gut decontamination continues to be practiced at many centers. More recently, the advent of next-generation sequencing (NGS) has resulted in cheaper and easier characterization of complex microbial mixtures. This has led to a renewed interest in evaluating the relationship between the microbiota and human health and disease, including recipients of hematopoietic cell transplantation (HCT). Similarly, NGS has also contributed to significant advancements in the investigator's understanding of immune reconstitution in HCT patients and how this may impact clinica outcomes. The goal of this protocol is to test the primary hypothesis that the engraftment stool microbiome diversity predicts one-year non-relapse mortality in patients undergoing reduced intensity allogeneic HCT.

Treatment Sites in Georgia

Blood and Marrow Transplant Program at Northside Hospital Cancer Institute

5670 Peachtree Dunwoody Road
Suite 1000
Atlanta, GA 30342

Emory University Hospital - Atlanta

1364 Clifton Road NE
Atlanta, GA 30322

**Clinical trials are research studies that involve people. These studies test new ways to prevent, detect, diagnose, or treat diseases. People who take part in cancer clinical trials have an opportunity to contribute to scientists’ knowledge about cancer and to help in the development of improved cancer treatments. They also receive state-of-the-art care from cancer experts... Click here to learn more about clinical trials.
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