A phase I trial of immunotherapy with lapuleucel-T (APC8024) in patients with refractory metastatic tumors that express HER-2/neu

Prema P. Peethambaram, Michelle E. Melisko, Kristine J. Rinn, Steven Robert Alberts, Nicole M. Provost, Lori A. Jones, Robert B. Sims, Lisa R C Lin, Mark W. Frohlich, John W. Park

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Abstract

Purpose: This study aimed to evaluate the safety of, immune response induced by, and efficacy of treatment with lapuleucel-T (APC8024) in patients with HER-2/neu - expressing tumors. Lapuleucel-T is an investigational active immunotherapy product consisting of autologous peripheral blood mononuclear cells, including antigen presenting cells, which are cultured ex vivo with BA7072, a recombinant fusion antigen consisting of portions of the intracellular and extracellular regions of HER-2/neu linked to granulocyte-macrophage colony-stimulating factor. Experimental Design: Patients with metastatic breast, ovarian, or colorectal cancer whose tumors expressed HER-2 were eligible. Patients underwent leukapheresis in week 0 and received lapuleucel-T infusions in weeks 0, 2, and 4. Patients who achieved a partial response or had stable disease through week 48 were eligible for re-treatment using the same protocol and dose as their initial treatment. Results: Eighteen patients were enrolled and treated. Patients showed an immune response to the immunizing antigen (BA7072) at week 8 compared with week 0 as measured by T lymphocyte proliferation and IFN-γ enzyme-linked immunospot assay. Therapy was well tolerated. The majority (94.7%) of adverse events associated with treatment were grade 1 or 2. Two patients experienced stable disease lasting >48 weeks. Conclusions: Autologous active cellular immunotherapy with lapuleucel-T stimulated an immuneresponse specific to the immunizing antigen and seemed to be well tolerated. Further clinical studies to assess the clinical benefit for patients with HER/2-neu-expressing breast, ovarian, and colorectal cancer are warranted.

Original languageEnglish (US)
Pages (from-to)5937-5944
Number of pages8
JournalClinical Cancer Research
Volume15
Issue number18
DOIs
StatePublished - Sep 15 2009

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ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Peethambaram, P. P., Melisko, M. E., Rinn, K. J., Alberts, S. R., Provost, N. M., Jones, L. A., Sims, R. B., Lin, L. R. C., Frohlich, M. W., & Park, J. W. (2009). A phase I trial of immunotherapy with lapuleucel-T (APC8024) in patients with refractory metastatic tumors that express HER-2/neu. Clinical Cancer Research, 15(18), 5937-5944. https://doi.org/10.1158/1078-0432.CCR-08-3282