Allogeneic gene-modified tumor cells (RCC-26/IL-7/CD80) as a vaccine in patients with metastatic renal cell cancer: a clinical phase-I study

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Item Type:	Article
Title:	Allogeneic gene-modified tumor cells (RCC-26/IL-7/CD80) as a vaccine in patients with metastatic renal cell cancer: a clinical phase-I study
Creators Name:	Westermann, J., Floercken, A., Willimsky, G., van Lessen, A., Kopp, J., Takvorian, A., Joehrens, K., Lukowsky, A., Schoenemann, C., Sawitzki, B., Pohla, H., Frank, R., Doerken, B., Schendel, D.J., Blankenstein, T. and Pezzutto, A.
Abstract:	Despite novel targeted agents, prognosis of metastatic renal cell cancer (RCC) remains poor, and experimental therapeutic strategies are warranted. Transfection of tumor cells with co-stimulatory molecules and/or cytokines is able to increase immunogenicity. Therefore, in our clinical study, 10 human leukocyte antigen (HLA)-A()0201(+) patients with histologically-confirmed progressive metastatic clear cell RCC were immunized repetitively over 22 weeks with 2.5-40 x 10(6) interleukin (IL)-7/CD80 cotransfected allogeneic HLA-A()0201(+) tumor cells (RCC26/IL-7/CD80). Endpoints of the study were feasibility, safety, immunological and clinical responses. Vaccination was feasible and safe. In all, 50% of the patients showed stable disease throughout the study; the median time to progression was 18 weeks. However, vaccination with allogeneic RCC26/IL-7/CD80 tumor cells was not able to induce TH1-polarized immune responses. A TH2 cytokine profile with increasing amounts of antigen-specific IL-10 secretion was observed in most of the responding patients. Interferon-γ secretion by patient lymphocytes upon antigen-specific and non-specific stimulation was substantially impaired, both before and during vaccination, as compared with healthy controls. This is possibly due to profound tumor-induced immunosuppression, which may prevent induction of antitumor immune responses by the gene-modified vaccine. Vaccination in minimal residual disease with concurrent depletion of regulatory cells might be one strategy to overcome this limitation.
Keywords:	Allogeneic Vaccine, Renal Cell Carcinoma, Gene Transfer, Tumor Vaccination
Source:	Gene Therapy
ISSN:	0969-7128
Publisher:	Nature Publishing Group
Volume:	18
Number:	4
Page Range:	354-363
Date:	April 2011
Official Publication:	https://doi.org/10.1038/gt.2010.143
PubMed:	View item in PubMed

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