Abstract |
Exosome-based immunotherapy for cancer holds promise, but needs improvements, especially for tumor-derived exosomes. We investigated, whether exosomes derived from IL-12-anchored human renal cancer cells could enhance their immunogenicity and increase induction of specific antitumor response. A mammalian co-expression plasmid of glycolipid-anchored-IL-12 (GPI-IL-12) was constructed by subcloning IL-12A chain gene (P35 subunit) and a fusion gene containing GPI-anchor signal sequence of human placental alkaline phosphatase-1 (hPLAP-1) and IL-12B chain gene (P40 subunit) in pBudCE4.1. Then exosomes were prepared from renal cancer cells modified to express GPI-IL-12. The results showed that exosomes derived from IL-12-anchored renal cancer cells expressed renal cell carcinoma-associated antigen G250 and GPI-IL-12. The incorporation of GPI-IL-12 onto exosomes (exosomes-GPI- IL-12, EXO/ IL-12) significantly promotes proliferation of T cells, and subsequently increased the release of IFN-gamma. Notably, stimulation with EXOs/ IL-12 could efficiently induce antigen-specific cytotoxic T lymphocytes (CTLs), resulting in more significant cytotoxic effects in vitro. These results suggested that exosomes derived from IL-12-anchored renal cancer cells bore GPI-IL-12 and G250, which have tumor rejection antigen with enhanced immunogenicity and antitumor effects, representing a novel strategy of exosomes-based vaccine for renal cell carcinoma.
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Authors | Yao Zhang, Chun-Li Luo, Bai-Cheng He, Jia-Mo Zhang, Gang Cheng, Xiao-Hou Wu |
Journal | International journal of oncology
(Int J Oncol)
Vol. 36
Issue 1
Pg. 133-40
(Jan 2010)
ISSN: 1791-2423 [Electronic] Greece |
PMID | 19956842
(Publication Type: Journal Article)
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Chemical References |
- Antigens, Neoplasm
- Antineoplastic Agents
- Cancer Vaccines
- Interleukin-12
- Interferon-gamma
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Topics |
- Antigens, Neoplasm
(metabolism)
- Antineoplastic Agents
(pharmacology)
- Cancer Vaccines
(therapeutic use)
- Carcinoma, Renal Cell
(metabolism, therapy)
- Cell Line, Tumor
- Cell Proliferation
- Exosomes
(metabolism)
- Humans
- Interferon-gamma
(metabolism)
- Interleukin-12
(metabolism)
- Kidney Neoplasms
(metabolism, therapy)
- Leukocytes, Mononuclear
(cytology)
- Microscopy, Confocal
(methods)
- Microscopy, Electron, Transmission
(methods)
- T-Lymphocytes, Cytotoxic
(metabolism)
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