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Krigel RL , Padavicshaller K , Toomey C , Comis RL , Weiner LM
Phase-I Study of Sequentially Administered Recombinant Tumor- Necrosis-Factor and Recombinant Interleukin-2
Journal of Immunotherapy. 1995 Apr;17(3) :161-170
AbstractThe purposes of this study were to determine the maximally tolerated dose (MTD) of IL-2 when sequentially administered following TNF (at its MTD), to identify any unique toxicities, and determine the immunomodulatory effects of this combination. Patients with metastatic cancer were treated with 160 mu g/ml rTNF by rapid i.v. infusion for 5 days, followed by rIL-2 therapy daily at doses up to 18 x 10(6) IU/m(2)/day for 5 days and 6 x 10(6) IU/m(2)/day for 7 days. Cycles were repeated at 3- or 4-week intervals until progressive disease or unacceptable toxicity developed. Fifteen patients received 46 cycles of therapy (range 1-8, median 3). Major toxicities included hypotension, weight loss, and decreased performance status comparable to that reported with rIL-2 alone. No novel toxicities were identified. Two of 14 patients who received two cycles of therapy had objective responses (1 complete, 1 partial). Both occurred in patients with malignant melanoma, lasted 30 and 75 weeks, respec tively, and included a complete response in liver metastasis. Dosage reductions of IL-2 were necessary for 3 patients over 11 treatment cycles (23%), and rTNF in 1 patient for 1 cycle (2%). The MTD of 5-day infusional rIL-2 was determined at 18 x 10(6) IU/m(2)/day. rTNF did not augment natural killer/lymphokine-activated killer activities beyond that commonly seen with IL-2 infusions. We conclude that full doses of rTNF can be combined with escalating rIL-2 infusions in an outpatient setting without additive toxicity and with clinical activity in patients with malignant melanoma.
NotesTimes Cited: 2 Article QX745 J IMMUNOTHER