Donor Mesenchymal Stem Cell Infusion in Treating Patients With Acute or Chronic Graft-Versus-Host Disease After Undergoing a Donor Stem Cell Transplant

OBJECTIVES:

Primary

• Determine the safety of donor mesenchymal stem cell (MSC) infusion in patients with acute or extensive chronic graft-vs-host disease (GVHD) after undergoing HLA-identical sibling donor stem cell transplant.

Secondary

• Describe the rates of complete and partial resolution of GVHD when MSCs are used in addition to the standard GVHD therapy.
• Determine inflammatory cytokine levels, lymphocyte subsets, and donor-reactive lymphocyte numbers in blood of patients with acute GVHD prior to therapy and at 7 and 14 days post-MSC therapy.
• Determine if donor MSCs engraft in tissues inflamed by GVHD in patients who have undergone gender-mismatched transplantation.

OUTLINE: This is a multicenter, dose-escalation study of donor mesenchymal stem cells (MSC).

Within 72 hours after the initiation of medical therapy (e.g., corticosteroids, cyclosporine) for graft-vs-host disease, patients undergo donor MSC infusion over 10-15 minutes.

Cohorts of 3-6 patients receive escalating doses of donor MSCs until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 3 or 2 of 6 patients experience dose-limiting toxicity.

Blood samples are obtained periodically and examined by immunoenzyme techniques for mixed lymphocyte reaction (as a surrogate marker for alloreactivity) and cytokine levels (TH1 [i.e., interleukin (IL)-2 and interferon-gamma], TH2 [i.e., IL-10 and IL-4], and inflammatory cytokines [i.e., tumor necrosis factor-alpha and IL-1]). Tissue specimens are examined by CD45 immunohistochemistry and fluorescent in situ hybridization to detect hematopoietic and nonhematopoietic cells.

After completion of study treatment, patients are followed periodically for 1 year.

PROJECTED ACCRUAL: A total of 24 patients will be accrued for this study.