Abstract | AIM: To construct eukaryotic expression vector of human 4-1BB ligand (4-1BBL) gene and express it in HT-29 cell line. To explore the effect on activation and cytotoxicity of human cytotoxic T lymphocytes(CTLs) induced by human 4-1BBL gene transfection into tumor cells in vitro. METHODS: RT-PCR was applied to amplify the full-length of human 4-1BBL gene from Raji cells. After sequencing, the cDNA was recombinated into the eukaryotic expression vector pcDNA3.1(-) and transfected into HT-29 cells through Lipofect AMINE 2000. Human 4-1BBL mRNA and protein expression of transfected cells was detected by RT-PCR and FACS respectively. Human peripheral blood mononuclear cells were stimulated with anti-CD3 mAb and incubated with non-transfected or transfected HT-29 cells, respectively. The MTT colorimetry was used to detect the proliferation and cytotoxic effect of T lymphocytes. Meanwhile, the expression of intracellular IFN-gamma was detected by FCM. RESULTS: The HT-29 cells transfected by pcDNA3.1(-)-h4-1BBL could express human 4-1BBL efficiently. As compared with wild type HT-29 cells, the transfected HT-29 cells had more effect for proliferation, IFN-gamma production and cytotoxic activity of lymphocytes. CONCLUSION: The recombinant eukaryotic expression vector of pcDNA3.1(-)-h4-1BBL is successfully constructed. The transfection of human 4-1BBL gene in HT-29 cells is effctive in enhancing its immunogenicity and inducing antitumor immune response in vitro.
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Authors | Kun Lu, Jun-ying Wu, Bai-qing Li |
Journal | Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology
(Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi)
Vol. 23
Issue 6
Pg. 511-4
(Jun 2007)
ISSN: 1007-8738 [Print] China |
PMID | 17553345
(Publication Type: Journal Article)
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Chemical References |
- 4-1BB Ligand
- Antibodies, Monoclonal
- CD3 Complex
- Interferon-gamma
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Topics |
- 4-1BB Ligand
(genetics, metabolism)
- Antibodies, Monoclonal
(pharmacology)
- CD3 Complex
(immunology)
- Cell Proliferation
(drug effects)
- Cells, Cultured
- Colorimetry
- Flow Cytometry
- Gene Expression Regulation
- Genetic Vectors
(genetics)
- HT29 Cells
- Humans
- Interferon-gamma
(metabolism)
- Reverse Transcriptase Polymerase Chain Reaction
- T-Lymphocytes, Cytotoxic
(cytology, drug effects, immunology, metabolism)
- Transfection
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