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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Gillis, S. Mizel, S. B. |
| Abstract | Several laboratories have recently demonstrated that the requirement for macrophages in mitogen-induced production of murine T-cell interleukin 2 (IL-2; formerly referred to as 'T-cell growth factor') could be circumvented by using the macrophage-derived peptide interleukin 1 (IL-1; formerly referred to as 'lymphocyte-activating factor'). Using two cloned T-cell lymphomas, we investigated the mechanism through which IL-1 exerted its effect on IL-2 production. One of the cell lines used (LBRM-33 5A4) produces large concentrations of IL-2 upon mitogen stimulation, whereas the second (LBRM-33 1A5) is incapable of producing IL-2 in response to mitogen. It was observed that addition of purified IL-1 to nonproducer 1A5 cells converted them to a state in which subsequent mitogen stimulation triggered production of IL-2. The concentration of IL-2 produced by IL-1 treated 1A5 cells was equivalent in magnitude to that generated by mitogen-stimulated 5A4 cells (500-1000 units/ml, or approximately 1000 times the concentration of IL-2 contained in conventional preparations of murine mitogen-conditioned medium). The observations that (i) brief exposure to IL-1 was sufficient for 1A5 cell conversion to IL-2 production and (ii) IL-1 could actively be absorbed from culture medium by live or fixed 1A5 cells led us to propose the existence of IL-1 receptors on responsive 1A5 cells. On the basis of these experiments, we have postulated that IL-1 mediates its effect on immune reactivity (enhancement of thymocyte mitogenesis and induction of antibody and cytotoxic T cell responses) by maturation of a subset of immature T cells to the point where they are capable of IL-2 production. Subsequent release of IL-2 after ligand activation allows for clonal expansion of activated T cells which mediate particular effector functions. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 78 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1981-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Lymphocyte Activation Lymphoma Immunology Proteins Pharmacology T-Lymphocytes Animals Cell Line Interleukin-1 Mice Models, Biological Drug Effects Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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