B-cell-stimulatory factor 2 (beta 2 interferon) functions as a second signal for interleukin 2 production by mature murine T cells.
- 1 November 1987
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 84 (21), 7629-7633
- https://doi.org/10.1073/pnas.84.21.7629
Abstract
Purified peripheral murine T cells, in the presence of concanavalin A, can be activated to produce interleukin 2 (IL-2) through stimulation either with a previously described murine lymphokine designated T cell-activating factor (TAF) or with a cloned human lymphokine that has been called .beta.2 interferon, B-cell-stimulatory factor 2, hybridoma growth factor, inducible 26-kDa protein, or hematopoietic colony-stimulating factor 309 by different investigators. We and others propose the designation interleukin 6 (IL-6) for the latter molecule. Our experiments demonstrate that either murine TAF or human IL-6 can restore the ability of purified T cells to proliferate in response to Con A or antibodies against the T-cell antigen receptor. Most if not all of the proliferation can be blocked by antibodies against the .alpha. chain of the IL-2 receptor. Furthermore, highly purified CD8- T cells can be activated by IL-6 in the presence of Con A to secrete IL-2. We propose that IL-6 and murine TAF are important "second signals" in primary antigen-receptor-dependent T-cell activation. Whether or not murine TAF is a homologoue of human IL-6 remains to be determined.This publication has 40 references indexed in Scilit:
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