Baricitinib for the Prophylaxis of Graft-Versus-Host Disease After Peripheral Blood Hematopoietic Cell Transplantation

In this trial, the investigators will begin to explore the possibility that, as in mice, JAK1/2 inhibition with hematopoietic cell transplantation (HCT) may mitigate graft-versus-host-disease (GVHD) while retaining engraftment and Graft-versus-Leukemia (GVL). Both preclinical and clinical data suggest that inhibition of IFNy and IL-6, directly and using downstream JAK Inhibitors, may be an effective strategy to decrease toxicities and improve disease control for patients undergoing Allogeneic HSCT. Baricitinib, as a JAK1/2 inhibitor, has shown superiority to other JAK inhibitors in preclinical GVHD models. The purpose of this phase I clinical trial is to determine the safety of baricitinib with HSCT measured by the effect on engraftment and grade III-IV acute graft-versus-host-disease (aGVHD).