Type I interferon suppresses type II interferon-triggered human anti-mycobacterial responses
Research output: Contribution to journal › Article
Colleges, School and Institutes
Type I interferons (IFN-α and IFN-β) are important for protection against many viral infections, whereas type II interferon (IFN-γ) is essential for host defense against some bacterial and parasitic pathogens. Study of IFN responses in human leprosy revealed an inverse correlation between IFN-β and IFN-γ gene expression programs. IFN-γ 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-β 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-γ-induced macrophage vitamin D-dependent antimicrobial peptide response was inhibited by IFN-β and by IL-10, suggesting that the differential production of IFNs contributes to protection versus pathogenesis in some human bacterial infections.
|Number of pages||6|
|Publication status||Published - 22 Mar 2013|
- 25-Hydroxyvitamin D3 1-alpha-Hydroxylase, Antimicrobial Cationic Peptides, Humans, Interferon-beta, Interferon-gamma, Interleukin-10, Leprosy, Lepromatous, Leprosy, Tuberculoid, Microbial Viability, Monocytes, Mycobacterium leprae, RNA, Messenger, Receptors, Calcitriol, Transcriptome, Tuberculosis, Up-Regulation, beta-Defensins