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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Cystatin SA, a cysteine proteinase inhibitor, induces interferon-gamma expression in CD4-positive T cells.

Recently, it has been demonstrated that family 2 cystatins upregulate interleukin-6 production by human gingival fibroblasts. In the present study, we investigated the effects of cystatin SA on cytokine production by helper T cells. Human CD4-positive T cells were cultured with phytohemagglutinin in the presence or absence of 0.1 microM recombinant cystatin SA1 or SA2. When the amounts of interleukin-4 (IL-4) and interferon-gamma (IFNgamma) were analyzed in an ELISA system after stimulation with either cystatin, no significantly increased levels of IL-4 were detected. However, the amounts of IFNgamma were significantly increased after stimulation with the cystatins. Our results suggest that salivary family 2 cystatins are involved in immune responses through the cytokine network.[1]

References

  1. Cystatin SA, a cysteine proteinase inhibitor, induces interferon-gamma expression in CD4-positive T cells. Kato, T., Ito, T., Imatani, T., Minaguchi, K., Saitoh, E., Okuda, K. Biol. Chem. (2004) [Pubmed]
 
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