TNF-alpha gene-modified dendritic cells act as more potent adjuvants for peptide delivery to induce specific antitumor immunity in mice.

Abstract:

OBJECTIVE:To investigate the antitumor immune efficiency of mouse dendritic cells (mDCs) by using adenovirus-mediated tumor necrosis factor-alpha (AdV-TNF-alpha) gene transfer. METHODS:MDCs infected with AdV-TNF-alpha and AdV-pLpA (no gene insert) at 100 multiplicity of infection (MOI) were analyzed by RNase protection assay for their cytokine secretion. Mixed lymphocyte reactions were also performed to analyze their capacity for alloantigen-presentation. C57BL/6 mice were challenged with R3LL tumor cells (Lewis lung carcinoma line) 10 days after vaccination with different engineered DCs and regular DCs as well. RESULTS:Compared to AdV-pLpA and mock-infected DCs, AdV-TNF-alpha-infected DCs displayed up-regulated expression of alpha tumor necrosis factor, interleukin-12 (IL-12), interleukin-18 (IL-18) and granulocyte macrophage colony stimulation factor (GM-CSF), and indicated stronger allogeneic T cell proliferative responses. Furthermore, vaccination of mice with dendritic cell tumor necrosis factor-alpha (DCTNF-alpha) pulsed with Mut1 peptide induced more efficient tumor-specific cytotoxic T lymphocyte (CTL) cytotoxicity against R3LL tumor cells in vitro and with efficient antitumor immunity in vivo. CONCLUSION:This type of engineered DCs could be applied in clinical settings of DC-based cancer vaccines.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Zhang W,Yang H,Wang Z,Jim X

keywords:

subject

Has Abstract

pub_date

2002-12-01 00:00:00

pages

1767-71

issue

12

eissn

0366-6999

issn

2542-5641

journal_volume

115

pub_type

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