What to do with targeted IL-2

Holger N. Lode, Rong Xiang, Patrizia Perri, Ursula Pertl, Axel Lode, Stephen D. Gillies, Ralph A. Reisfeld

Research output: Contribution to journalArticlepeer-review

Abstract

A common strategy in immunotherapy of cancer is the induction of an increased immunogenicity of syngeneic malignancies. A novel approach to achieve this goal is the targeting of cytokines into the tumor microenvironment with antibody-cytokine fusion proteins, called immunocytokines. This report summarizes therapeutic efficacy and immune mechanisms involved in targeting IL-2 to syngeneic tumors and describes their extended use as a synergistic treatment modality for cancer vaccines and antiangiogenesis. Treatment of established melanoma and colon carcinoma metastases with IL-2 immunocytokines resulted in eradication of disease, followed by a vaccination effect protecting mice from lethal challenges with wild-type tumor cells. In a syngeneic neuroblastoma model, targeted IL-2 elicited effective antitumor responses mediated by NK cells in the absence of a T-cell memory. Interestingly, targeted IL-2 was effective in amplification of memory immune responses previously induced by cancer vaccines. Furthermore, a synergistic effect achieved by combining targeted IL-2- immunotherapy with an antiangiogenic inhibitor of integrin α(v)β3 extends the potential of this immunotherapeutic strategy in combination with antiangiogenesis as demonstrated in three syngeneic tumor models. Based on these findings, targeted IL-2 may provide an effective tool for the adjuvant treatment of cancer either applied as a single strategy or in combination with cancer vaccines and antiangiogenic strategies. (C) 2000 Prous Science.

Original languageEnglish
Pages (from-to)321-336
Number of pages16
JournalDrugs of Today
Volume36
Issue number5
Publication statusPublished - May 2000

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology (medical)
  • Pharmacology

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