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Interferon lambda-1 (IFN-lambda 1/IL-29) induces ELR- CXC chemokine mRNA in human peripheral blood mononuclear cells, in an IFN-gamma-independent manner


, : Interferon lambda-1 (IFN-lambda 1/IL-29) induces ELR- CXC chemokine mRNA in human peripheral blood mononuclear cells, in an IFN-gamma-independent manner. Genes and Immunity 8(2): 177-180

Interferon lambda-1 (IFN-lambda 1), the prototype Type-III interferon, has antiviral functions similar to those of the Type-I interferons, IFN-alpha and IFN-beta. However, IFN-lambda 1 is capable of signaling through almost all STAT molecules and so it is possible that it may have novel immunoregulatory functions in addition to antiviral ones. From a range of chemokines tested, IFN-lambda 1 elevated mRNA levels of only 'Monokine induced by IFN-gamma' (MIG/CXCL9), 'IFN-gamma inducible protein-10' (IP-10/CXCL10) and 'IFN-gamma inducible T-cell a chemoattractant' (I-TAC/CXCL11) from human peripheral blood mononuclear cells. As their names suggest, these chemokines are also induced by IFN-g, the only member of the Type-II interferon family. This action of IFN-lambda 1 did not depend on intermediate induction of IFN-g and is therefore, likely to be independent of IFN-g. Further, our results suggest that donors responded to IFN-lambda 1 stimulation either 'early' or 'late'. Overall the action of IFN-lambda 1 was similar to that previously reported for IFN-g and may invite more detailed investigation of the role of IFN-lambda 1 at the innate/adaptive interface.

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