Attenuation of interleukin 2 signal in the spleen cells of complex ganglioside-lacking mice - PubMed (original) (raw)
. 1999 May 14;274(20):13744-7.
doi: 10.1074/jbc.274.20.13744.
Affiliations
- PMID: 10318776
- DOI: 10.1074/jbc.274.20.13744
Free article
Attenuation of interleukin 2 signal in the spleen cells of complex ganglioside-lacking mice
J Zhao et al. J Biol Chem. 1999.
Free article
Abstract
T cell development and function in complex ganglioside-lacking (GM2/GD2 synthase gene-disrupted) mice were analyzed. GM1, asialo-GM1, and GD1b were representative gangliosides expressed on T cells of the wild type mice and completely deleted on those of the mutant mice. The sizes and cell numbers of the mutant mice spleen and thymus were significantly reduced. Spleen cells from the mutant mice showed clearly reduced proliferation compared with the wild type when stimulated by interleukin 2 (IL-2) but not when treated with concanavalin A or anti-CD3 cross-linking. Expression levels of IL-2 receptor alpha, beta, and gamma were almost equivalent, and up-regulation of alpha chain after T cell activation was also similar between the mutant and wild type mice. Activation of JAK1, JAK3, and SAT5 after IL-2 treatment was reduced, and c-fos expression was delayed and reduced in the mutant spleen cells, suggesting that the IL-2 signal was attenuated in the mutant mice probably due to the modulation of IL-2 receptors by the lack of complex gangliosides.
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