Title : Cell-specific expression of <i>Hfe</i> determines the outcome of <i>Salmonella enterica</i> serovar Typhimurium infection in mice

Pub. Date : 2021 Dec 1

PMID : 33054105






8 Functional Relationships(s)
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1 Mutations in HFE cause hereditary hemochromatosis type I hallmarked by increased iron absorption, iron accumulation in hepatocytes and iron deficiency in myeloid cells. Iron homeostatic iron regulator Mus musculus
2 Mutations in HFE cause hereditary hemochromatosis type I hallmarked by increased iron absorption, iron accumulation in hepatocytes and iron deficiency in myeloid cells. Iron homeostatic iron regulator Mus musculus
3 By contrast, mice with hepatocyte-specific deletion of Hfe succumbed earlier to Salmonella infection because of unrestricted extracellular bacterial replication associated with high iron availability in the serum and impaired expression of essential host defense molecules such as interleukin-6, interferon-gamma and nitric oxide synthase-2. Iron homeostatic iron regulator Mus musculus
4 Wild-type mice subjected to dietary iron overload phenocopied hepatocyte-specific Hfe deficiency suggesting that increased iron availability in the serum is deleterious in Salmonella infection and underlies impaired host immune responses. Iron homeostatic iron regulator Mus musculus
5 Wild-type mice subjected to dietary iron overload phenocopied hepatocyte-specific Hfe deficiency suggesting that increased iron availability in the serum is deleterious in Salmonella infection and underlies impaired host immune responses. Iron homeostatic iron regulator Mus musculus
6 Moreover, the macrophage-specific effect is dominant over hepatocyte-specific Hfe-depletion, as Hfe knock-out mice have increased survival despite the higher parenchymal iron load associated with systemic loss of Hfe. Iron homeostatic iron regulator Mus musculus
7 Moreover, the macrophage-specific effect is dominant over hepatocyte-specific Hfe-depletion, as Hfe knock-out mice have increased survival despite the higher parenchymal iron load associated with systemic loss of Hfe. Iron homeostatic iron regulator Mus musculus
8 We conclude that cell-specific expression of Hfe in hepatocytes and macrophages differentially affects the course of infections with specific pathogens by determining bacterial iron access and the efficacy of anti-microbial immune effector pathways. Iron homeostatic iron regulator Mus musculus