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  • Title: Low dose interleukin-2 following intensification therapy with high dose cytarabine for acute myelogenous leukemia in first complete remission.
    Author: Stone RM, DeAngelo DJ, Janosova A, Galinsky I, Canning C, Ritz J, Soiffer RJ.
    Journal: Am J Hematol; 2008 Oct; 83(10):771-7. PubMed ID: 18756547.
    Abstract:
    The most important problem in the therapy of patients with acute myeloid leukemia (AML) is relapse after intensive therapy. We sought to determine if interleukin-2 (low-dose with intermittent boluses) administration could be feasibly administered after standard therapy to potentiate anti-tumor immunity in a fashion analogous to the post-allogeneic stem cell transplant "graft-vs-leukemic" effect. Adults with de novo AML received daunorubicin and cytosine arabinoside induction therapy. Patients achieving complete remission received high dose ara-C (HIDAC) for three courses followed by low dose rIL-2 (Amgen), administered by continuous infusion (450,000 U/m(2)/day) for 10 weeks with intermittent boluses (500,000/U/m(2) over 2 hr) given in weekly intervals starting on Week 4. Of the 32 enrolled patients, 27 achieved CR; 8/11 who received rIL-2 completed therapy. 6/11 are long term survivors (median follow-up, 139 months). rIL-2 was well tolerated and associated with a 5-fold increase in circulating NK-lymphocytes and a 3-fold increase in circulating T-cells. Mononuclear cells from patients receiving rIL-2 exhibited enhanced cytolytic activity in vitro against cryopreserved autologous leukemia cells. This study supports further investigation of immunotherapy in the post-intensive chemotherapy setting in the management of patients with AML.
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