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Abstract
Type I interferons (IFN-a and IFN-ß) are important for protection against many viral infections, whereas type II interferon (IFN-?) is essential for host defense against some bacterial and parasitic pathogens. Study of IFN responses in human leprosy revealed an inverse correlation between IFN-ß and IFN-? gene expression programs. IFN-? and its downstream vitamin D-dependent antimicrobial genes were preferentially expressed in self-healing tuberculoid lesions and mediated antimicrobial activity against the pathogen Mycobacterium leprae in vitro. In contrast, IFN-ß and its downstream genes, including interleukin-10 (IL-10), were induced in monocytes by M. leprae in vitro and preferentially expressed in disseminated and progressive lepromatous lesions. The IFN-?-induced macrophage vitamin D-dependent antimicrobial peptide response was inhibited by IFN-ß and by IL-10, suggesting that the differential production of IFNs contributes to protection versus pathogenesis in some human bacterial infections.
View details for DOI 10.1126/science.1233665
View details for Web of Science ID 000316740700047
View details for PubMedID 23449998
View details for PubMedCentralID PMC3653587