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Published in: Journal of Cancer Research and Clinical Oncology 7/2005

01-07-2005 | Original Paper

Intratumoral injection of interferon-gamma gene-modified dendritic cells elicits potent antitumor effects: effective induction of tumor-specific CD8+ CTL response

Authors: Jianping Pan, Minghui Zhang, Jianli Wang, Qingqing Wang, Dajing Xia, Wenji Sun, Lihuang Zhang, Hai Yu, Xuetao Cao

Published in: Journal of Cancer Research and Clinical Oncology | Issue 7/2005

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Abstract

Purpose

To examine the antitumor efficacy of intratumoral injection of interferon-gamma gene-modified dendritic cells (DC-IFN-γ) in a B16 melanoma model and to investigate its related immunological mechanisms.

Methods

C57BL/6 mice-derived DC were transfected with adenovirus encoding IFN-γ or β-galactosidase (DC-LacZ). Secretion of IFN-γ and TNF-α by DC was detected by ELISA. Nitric oxide (NO) production was measured by Griess reaction. Cytotoxicity of DC against tumor cell lines and activity of cytotoxic T lymphocytes (CTLs) were determined by 51Cr-release assay. TRP-2aa180–188-specific CD8+ CTLs in tumor-bearing mice with different treatment were determined by ELISPOT.

Results

DC-IFN-γ could secrete high levels of IFN-γ, NO and TNF-α. DC-IFN-γ were cytolytic to B16 melanoma cells in vitro, but DC-LacZ and DC were not. Significant inhibition of tumor growth and prolonged survival were achieved in tumor-bearing mice intratumorally injected with DC-IFN-γ when compared with those in tumor-bearing mice intratumorally injected with DC, DC-LacZ, fibroblasts, IFN-γ gene-modified fibroblasts or PBS. After treatment with DC-IFN-γ, enhanced Th1 and decreased Th2 responses were observed, and B16 melanoma antigen TRP-2aa180–188-specific CD8+ CTLs were induced significantly in the tumor-bearing mice.

Conclusions

Intratumorally injected DC-IFN-γ can uptake tumor antigens in situ and cross-present tumor antigens to specific CD8+ T cells, hereby eliciting effective antitumor effects in murine model with preestablished B16 melanoma.
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Metadata
Title
Intratumoral injection of interferon-gamma gene-modified dendritic cells elicits potent antitumor effects: effective induction of tumor-specific CD8+ CTL response
Authors
Jianping Pan
Minghui Zhang
Jianli Wang
Qingqing Wang
Dajing Xia
Wenji Sun
Lihuang Zhang
Hai Yu
Xuetao Cao
Publication date
01-07-2005
Publisher
Springer Berlin Heidelberg
Published in
Journal of Cancer Research and Clinical Oncology / Issue 7/2005
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-004-0651-y

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