Immunotherapy with Dendritic Cells Modified with Tumor-Associated Antigen Gene Demonstrates Enhanced Antitumor Effect Against Lung Cancer.

Abstract:

BACKGROUND:Immunotherapy using dendritic cell (DC) vaccine has the potential to overcome the bottleneck of cancer therapy. METHODS:We engineered Lewis lung cancer cells (LLCs) and bone marrow-derived DCs to express tumor-associated antigen (TAA) ovalbumin (OVA) via lentiviral vector plasmid encoding OVA gene. We then tested the antitumor effect of modified DCs both in vitro and in vivo. RESULTS:The results demonstrated that in vitro modified DCs could dramatically enhance T-cell proliferation (P<.01) and killing of LLCs than control groups (P<.05). Moreover, modified DCs could reduce tumor size and prolong the survival of LLC tumor-bearing mice than control groups (P<.01 and P<.01, respectively). Mechanistically, modified DCs demonstrated enhanced homing to T-cell-rich compartments and triggered more naive T cells to become cytotoxic T lymphocytes, which exhibited significant infiltration into the tumors. Interestingly, modified DCs also markedly reduced tumor cells harboring stem cell markers in mice (P<.05), suggesting the potential role on cancer stem-like cells. CONCLUSION:These findings suggested that DCs bioengineered with TAA could enhance antitumor effect and therefore represent a novel anticancer strategy that is worth further exploration.

journal_name

Transl Oncol

journal_title

Translational oncology

authors

Jiang T,Chen X,Zhou W,Fan G,Zhao P,Ren S,Zhou C,Zhang J

doi

10.1016/j.tranon.2016.12.002

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

132-141

issue

2

issn

1936-5233

pii

S1936-5233(16)30201-7

journal_volume

10

pub_type

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