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  • Title: Clinical and immunomodulatory effects of combination immunotherapy with low-dose interleukin 2 and tumor necrosis factor alpha in patients with advanced non-small cell lung cancer: a phase I trial.
    Author: Yang SC, Grimm EA, Parkinson DR, Carinhas J, Fry KD, Mendiguren-Rodriguez A, Licciardello J, Owen-Schaub LB, Hong WK, Roth JA.
    Journal: Cancer Res; 1991 Jul 15; 51(14):3669-76. PubMed ID: 1648441.
    Abstract:
    Sixteen patients with metastatic non-small cell lung cancer were treated with a combination of simultaneous low-dose interleukin 2 (IL-2) and tumor necrosis factor alpha. The purpose of this phase I dose escalation trial was to assess the clinical toxicities, immunomodulatory effects, and antitumor efficacy of this combination. Patients received a continuous daily i.v. infusion of 6 x 10(6) IU/m2 of IL-2 for 5 days and a concomitant daily i.m. dose of tumor necrosis factor alpha on each day of IL-2 administration. Tumor necrosis factor alpha administration started at a dose of 25 micrograms/m2/day (level I) for seven patients, 50 micrograms/m2/day (level II) for seven patients, and 100 micrograms/m2/day (level III) for two patients. Treatment was given at 3-week intervals. Only one patient required monitoring by an intensive care unit during therapy. Major toxic effects included fever, local skin reaction at the i.m. injection site, pancytopenia, and general malaise, all of which were reversible within 48 h of cessation of therapy. Dose level II was determined to be the maximum tolerated dose, with the dose-limiting toxicity being thrombocytopenia (less than 50,000/microliters). In 12 evaluable patients, one partial and three minor tumor regressions were observed. Seven patients with progressive disease before entry into this study had radiographic stabilization of their disease (median, 12 weeks) before termination of therapy due to progression. All patients exhibited biological responses including augmented lymphokine-activated killer and natural killer cell activities while receiving therapy, as assessed by the cytolysis of Raji- and K562 targets in vitro. Enhanced lysis of autologous tumor during therapy was demonstrated for four patients with available tumor samples. Serum levels of IL-2 were detected by enzyme-linked immunosorbent assay 2 weeks after cessation of therapy. This serum IL-2 had biological activity, which was evident from the ability to induce proliferation of NK-8 cells (an IL-2-dependent cell line) which was abrogated by anti-IL-2 antibody.
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