Journal
INTERNATIONAL JOURNAL OF HEMATOLOGY
Volume 80, Issue 4, Pages 325-331Publisher
SPRINGER JAPAN KK
DOI: 10.1532/IJH97.04087
Keywords
interferon; IFN-zeta; limitin; signal; structure
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Interferon xi (IFN-xi)/limitin has been regarded as a novel type I IFN by the Nomenclature Committee of the International Society for Interferon and Cytokine Research. IFN-xi/limitin, which has some sequence homology with IFN-alpha and IFN-beta, has a globular structure with 5 alpha helices and 4 loops and recognizes IFN-alpha/beta receptor. Although it displays antiviral, immunomodulatory, and antitumor effects, IFN-xi/limitin has much less lymphomyelosuppressive activity than IFN-alpha. Unique interactions between IFN-xi/limitirt and the receptor probably led to the narrow range of signals and biological activities. A human homologue of IFN-xi/limitin may be clinically more effective than IFN-alpha and IFN-beta because it has fewer adverse effects. Moreover, further analysis of the structure-function relationship may establish an engineered cytokine with the useful features of IFN-xi/limitin. (C) 2004 The Japanese Society of Hematology.
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