Clinical Trial: Tacrolimus and Mycophenolate Mofetil With or Without Sirolimus in Preventing Acute Graft-Versus-Host Disease in Patients Who Are Undergoing Donor Stem Cell Transplant for Hematologic Cancer

Study Status: Active, not recruiting
Recruit Status: Active, not recruiting
Study Type: Interventional

Official Title: A Randomized Phase II Study to Determine the Most Promising Postgrafting Immunosuppression for Prevention of Acute GVHD After Unrelated Donor G-CSF Mobilized Peripheral Blood Mononuclear Cell (G-PBMC)

Brief Summary: This randomized phase II trial studies how well giving tacrolimus and mycophenolate mofetil (MMF) with or without sirolimus works in preventing acute graft-versus-host disease (GVHD) in patients undergoing donor stem cell transplant for hematologic cancer. Giving low doses of chemotherapy, such as fludarabine phosphate, and total-body-irradiation before a donor peripheral blood stem cell transplant helps stop the growth of cancer cells. It also stops the patient's immune system from rejecting the donor's stem cells. The donated stem cells may replace the patient's immune system and help destroy any remaining cancer cells (graft-versus-tumor effect). Sometimes the transplanted cells from a donor can also make an immune response against the body's normal cells. Giving MMF and tacrolimus with or without sirolimus after transplant may stop this from happening.

Detailed Summary:

PRIMARY OBJECTIVES:

I. To determine which of 3 GVHD prophylaxis regimens results in reduction of acute grades II-IV GVHD to =< 40%.

SECONDARY OBJECTIVES:

I. Reduce the incidence of non-relapse mortality from infections and GVHD before day 200 to =< 15%.

II. Reduce the utilization of high-dose corticosteroids compared to protocols 1463, 1641, and 1668.

III. Compare survival and progression-free survival to that achieved under protocols 1463, 1641, and 1668.

OUTLINE:

CONDITIONING: All patients receive fludarabine phosphate intravenously (IV) over 30 minutes on days -4 to -2 and undergo total-body irradiation on day 0.

TRANSPLANTATION: All patients undergo allogeneic peripheral blood stem cell transplantation on day 0.

IMMUNOSUPPRESSION: Patients are randomized to 1 of 3 treatment arms.

ARM I: Patients receive tacrolimus IV or orally (PO) every 12 hours on days -3 to 180 with taper beginning on day 100 in the absence of GVHD. Patients also receive MMF PO every 8 hours on days 0-29 and then every 12 hours on days 30-96 with taper beginning on day 40 in the absence of GVHD.

ARM II: Patients receive tacrolimus IV or PO every 12 hours on days -3 to 150 with taper beginning on day 100 in the absence of GVHD. Patients also receive MMF PO every 8 hours on days 0-29 and then every 12 hours on days 30-180 with taper beginning on day 150 in the absence of GVHD.

Percentage patients with grades II-IV GHVD, estimated by cumulative incidence methods.

Cumulative incidence methods are the standard way to estimate incidence of an endpoint in the presence of competing risks and censoring (ref)" Here is the reference. Gooley TA, Leisenring W, Crowley J, Storer BE: Estimation of failure probabilities in the presence of competing risks: new representations of old estimators. Statistics in Medicine 18:695-706, 1999. PMID 10204198