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- W1978316761 abstract "Induction of cytokine gene transcription by recombinant human IL-2 (rhIL-2) in peripheral blood mononuclear cells (PBMC) from healthy donors was studied by qualitative polymerase chain reaction. In all donors tested, optimal doses of rhIL-2-induced transcription of genes encoding for IL-5, GM-CSF, IFN-γ and TNF-α whereas transcription of IL-1-α, IL-3, IL-4, and IL-6 genes could only be detected in about half of the donors. Moreover, we observed that different doses of rhIL-2 were needed to induce transcription of different cytokine genes. In contrast, transcription of IL-2 and IL-10 genes was only observed in a minority of donors, irrespective of the concentration of rhIL-2 used. Since IL-10 displays a well-characterized inhibitory activity on the synthesis of cytokines possibly involved in the generation of lymphokine-activated killer (LAK) cells, we asked whether the absence of IL- 10 gene transcription plays a role in the induction of LAK cells. Thus, we tested the effects of different doses of rhIL-10 on the rhIL-2-driven generation of LAK activity. Interestingly, rhIL-10 dose-dependently inhibited the production of IFN-γ and TNF-α induced by IL-2, but had no effects on PBMC proliferation and generation of LAK activity. Similarly, purified CD3-/CD16+ lymphocytes, the precursors of LAK effector cells, could be optimally induced by low doses of rhIL-2 to proliferate and generate MHC-unrestricted cytotoxic activity against NK-resistant targets in the presence of rhIL-10. Altogether, our results indicate that rhIL-2 induces transcription of a preferential pattern of cytokine genes, with the IL-10 gene being infrequently transcribed. On the other hand, rhIL-10 shows diverse effects on rhIL-2-triggered PBMC activation, in that it inhibits IFN-γ and TNF-α production but does not affect PBMC proliferation or generation of LAK activity." @default.
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- W1978316761 date "1993-02-01" @default.
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- W1978316761 title "On the Relative Roles of Interleukin-2 and Interleukin-10 in the Generation of Lymphokine-Activated Killer Cell Activity" @default.
- W1978316761 doi "https://doi.org/10.1006/cimm.1993.1035" @default.
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