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Archive > Volume 25 Issue 9 > 2018,25(9):872-877. DOI:10.3872/j.issn.1007-385X.2018.09.005 Prev Next
Basic Research
IL-12 reverses inhibitory effect of cisplatin on immune function of human NK cells and its mechanism
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Abstract:
Objective: To investigate the reverse effect and mechanism of IL-12 on chemotherapeutic medicine suppressing the immune function of NK cells. Methods: Purified NK cells were stimulated with PMA plus Ionomycin in the presence or absent of Cisplatin (DDP) and IL-12. The levels of IFN- γ and TNF- α in culture supernatants were detected by enzyme-linked immunosorbent assay (ELISA); The content of IFN-γ and TNF-α, TRAIL (TNF-related apoptosis inducing ligand) and transcription factors including T-bet and p-STAT-4 in NK cells were analyzed by Flow cytometry. The cytotoxicity of purified NK cells (pretreated with/without chemotherapeutics and IL-12 for 48 h) to Jurkat cells was measured by Flow cytometry. Results: Chemotherapeutics significantly inhibited the production of IFN-γ, TNF-α and the expression of TRAIL in NK cells, which were significantly reversed by IL-12 (P<0.05 or P<0.01). Further study revealed that chemotherapeutics down-regulated while IL-12 reversed the expression of p-STAT4 to restore cytokine production.In addition, DDP also inhibited but IL-12 recovered the cytotoxicity of NK cells against tumor cells by inducing the expression of TRAIL (P<0.05 or P<0.01). Conclusion: Chemotherapeutics inhibited the cytotoxicity of NK cells and its secretion of cytokines (IFN-γ and TNF-α), which were reversed by IL-12 via up-regulating TRAIL and p-STAT-4; this might provide experimental evidence for the clinical application of IL-12 for rebuild the immune function of tumor patients receiving chemotherapy.
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Project Supported:
Project supported by the National Natural Science Foundation of China (No.31470888)
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