Abstract
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.
MeSH Terms
25-Hydroxyvitamin D3 1-alpha-Hydroxylase/genetics,metabolism
Antimicrobial Cationic Peptides/genetics,metabolism
Humans
Interferon-beta/genetics,immunology,metabolism
Interferon-gamma/genetics,immunology,metabolism
Interleukin-10/genetics,metabolism
Leprosy, Lepromatous/genetics,immunology,metabolism
Leprosy, Tuberculoid/genetics,immunology,metabolism
Microbial Viability
Monocytes/immunology,metabolism
Mycobacterium leprae/immunology,physiology
RNA, Messenger/genetics,metabolism
Receptors, Calcitriol/genetics,metabolism
Transcriptome
Tuberculosis/genetics,immunology
Up-Regulation
beta-Defensins/genetics,metabolism
Chemicals
Antimicrobial Cationic Peptides
DEFB4A protein, human
RNA, Messenger
Receptors, Calcitriol
beta-Defensins
Interleukin-10
ropocamptide
Interferon-beta
Interferon-gamma
25-Hydroxyvitamin D3 1-alpha-Hydroxylase
Authors & Affiliations
20 authors, click to expand affiliations / ORCID
Teles Rosane M B
Division of Dermatology, David Geffen School of Medicine at University of California, Los Angeles, CA 90095, USA.
Graeber Thomas G
Krutzik Stephan R
Montoya Dennis
Schenk Mirjam
Lee Delphine J
Komisopoulou Evangelia
Kelly-Scumpia Kindra
Chun Rene
Iyer Shankar S
Sarno Euzenir N
Rea Thomas H
Hewison Martin
Adams John S
Popper Stephen J
Relman David A
Stenger Steffen
Bloom Barry R
Cheng Genhong
Modlin Robert L
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