title: The transcription factor NFATp plays a key role in susceptibility to TB in mice.
abstract: In T cells, the transcription factor nuclear factor of activated T cells p (NFATp) is a key regulator of the cytokine genes tumor necrosis factor (TNF) and interferon-γ (IFN-γ). Here, we show that NFATp-deficient (NFATp(-/-)) mice have a dramatic and highly significant increase in mortality after Mycobacterium tuberculosis (MTb) infection as compared to mortality of control animals after MTb infection. Animals deficient in NFATp have significantly impaired levels of TNF and IFN-γ transcription and protein expression in naïve or total CD4(+) T cells, but display wild-type levels of TNF mRNA or protein from MTb-stimulated dendritic cells (DC). The rapid mortality and disease severity observed in MTb-infected NFATp(-/-) mice is associated with dysregulated production of TNF and IFN-γ in the lungs, as well as with increased levels of TNF, in their serum. Furthermore, global blocking of TNF production by injection of a TNF neutralizaing agent at 6 weeks, but not 12 weeks, post-MTb-infection further decreased the survival rate of both wild-type and NFATp(-/-) mice, indicating an early role for TNF derived from cells from the monocyte lineage in containment of infection. These results thus demonstrate that NFATp plays a critical role in immune containment of TB disease in vivo, through the NFATp-dependent expression of TNF and IFN-γ in T cells.
authors: Tuberculosis Research Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, Maryland, United States of America.
authors: Laura E
authors: LE
authors: Via
authors: Alla V
authors: AV
authors: Tsytsykova
authors: Ricardo
authors: R
authors: Rajsbaum
authors: James V
authors: JV
authors: Falvo
authors: Anne E
authors: AE
authors: Goldfeld
mesh_terms: D000818:Animals; D003713:Dendritic Cells / Q000276:immunology / Q000378:metabolism / Q000382:microbiology; D004198:Disease Susceptibility; D017353:Gene Deletion; D007371:Interferon-gamma / Q000235:genetics; D008168:Lung / Q000276:immunology / Q000378:metabolism / Q000382:microbiology; D051379:Mice; D009000:Monocytes / Q000276:immunology / Q000378:metabolism / Q000382:microbiology; D009169:Mycobacterium tuberculosis / Q000472:pathogenicity; D050778:NFATC Transcription Factors / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D014397:Tuberculosis, Pulmonary / Q000235:genetics / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D014409:Tumor Necrosis Factor-alpha / Q000097:blood / Q000235:genetics / Q000378:metabolism
chemical_list: D050778:NFATC Transcription Factors; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma