Sirolimus and Mycophenolate Mofetil in Preventing GVHD in Patients With Hematologic Malignancies Undergoing HSCT

PRIMARY OBJECTIVES:

I. Evaluate the safety and feasibility of administering sirolimus and mycophenolate mofetil
(MMF) as prophylaxis of grade III-IV acute graft versus host disease (aGvHD) in patients
undergoing mismatched unrelated and related donor hematopoietic stem cell transplant (HSCT).

OUTLINE:

Patients receive sirolimus orally (PO) starting on day -3, 3 times a week during
hospitalization and then once a week for up to 6 months. Patients undergo HSCT on day 0.
Patients also receive mycophenolate mofetil intravenously (IV) or PO three times a day (TID)
on days 1-180. Treatment continues in the absence of disease progression or unacceptable
toxicity.

After completion of study treatment, patients are followed up at days 30, 60, 100, 180, 270,
and 365, and then yearly thereafter.

Inclusion Criteria:

- Subjects must have one of the following disease categories:

- Acute myeloid leukemia (AML) beyond 2nd remission or relapsed/refractory disease

- Acute lymphoblastic leukemia (ALL) beyond 2nd remission or relapsed/refractory
disease

- Chronic myeloid leukemia (CML) beyond 2nd chronic phase or in blast crises

- Myelodysplastic syndrome (MDS)

- Myeloproliferative disorders including myeloid metaplasia and myelofibrosis

- High risk non-Hodgkin's lymphoma (NHL) in first remission

- Relapsed or refractory NHL

- Hodgkin's lymphoma (HL) beyond first remission

- Performance status by Karnofsky of >= 70% or Lansky > 70% for patients < 16 years of
age

- Human leukocyte antigen (HLA) mismatched related or unrelated donor identified 8/10 or
9/10

- Willingness to take oral medications during the transplantation period

- Willingness and ability to sign a written informed consent (assent if applicable)

Exclusion Criteria:

- Prior myeloablative allogeneic or autologous HSCT

- Human immunodeficiency virus (HIV) infection

- Pregnant or lactating females

- Evidence of uncontrolled active infection

- Down syndrome

- Serum creatinine (CR) < 1.5mg/dl or 24 hour CR clearance < 50 ml/min

- Direct bilirubin > 2 x upper limit of normal (ULN)

- Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) > 2 x ULN

- Carbon monoxide diffusing capability test (DLCO) > 60% predicted and in children- room
air oxygen saturation > 92%

- Left ventricular ejection fraction < 45% and in children-shortening fraction < 26%

- Fasting cholesterol > 300 mg/dl or triglycerides > 300 while on lipid lowering agents

- Patients who have received an investigational drug within 30 days of enrollment in
study

- Patients with prior malignancies except basal cell carcinoma or treated carcinoma
in-situ; cancer treated with curative intent > 5 years will be allowed; cancer
treatment with curative intent =< 5 years will not be allowed