Abstract:
:CD40/CD40 ligand (CD40L) interaction plays an essential role in cell-mediated immune responses. We examined whether expression of CD40L in murine lung carcinoma (A11) cells could produce antitumor effects. The proliferation rate in vitro of A11 cells transfected with the murine CD40L gene (A11/CD40L) was not different from that of parent cells; however, half of the immunocompetent mice inoculated with A11/CD40L cells did not form tumors and the growth of A11/CD40L tumors developed in the rest of mice was significantly retarded compared with that of parent tumors. Protective immunity was also induced in the mice that had rejected A11/CD40L cells. In T-cell-defective nude mice, these antitumor effects were not observed. Bone-marrow-derived dendritic cells (DCs), when cultured with A11/CD40L cells, formed clusters with the tumors and showed upregulated CD86 expression. Expression of the interleukin-23 (IL-23) p19, IL-12p35, IL-18, interferon-gamma (IFN-gamma) and Mig (monokine induced by IFN-gamma) genes was induced in the DCs that were cultured with A11/CD40L but not with A11 cells, and P40, the subunit of both IL-12 and IL-23, was secreted from the cocultured DCs. These data directly showed that the expression of CD40L in tumors facilitated the interaction between DCs and the tumors, enhanced the maturation of DCs, induced secretion of cytokines, and consequently produced T-cell-dependent systemic immunity.
journal_name
Cancer Gene Therjournal_title
Cancer gene therapyauthors
Tada Y,O-Wang J,Yu L,Shimozato O,Wang YQ,Takiguchi Y,Tatsumi K,Kuriyama T,Takenaga K,Sakiyama S,Tagawa Mdoi
10.1038/sj.cgt.7700584subject
Has Abstractpub_date
2003-06-01 00:00:00pages
451-6issue
6eissn
0929-1903issn
1476-5500pii
7700584journal_volume
10pub_type
杂志文章abstract::All animal experiments were approved by the Animal Care and Use Committee (ACUC), Louisiana State University Health Science Center and not The People's Hospital of Liaoning Province as indicated in the original version of the Article. The PDF and HTML versions of the Article have been modified accordingly. ...
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abstract::The success of cancer gene therapies requiring in vivo gene transfer is severely hampered by the low efficacy of gene transfer, which has been difficult to improve. We therefore established a novel strategy to increase the share of transduced cells post gene transfer. We hypothesized that in vivo selection of tumor ce...
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journal_title:Cancer gene therapy
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journal_title:Cancer gene therapy
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