| First Author | Kim DK | Year | 2014 |
| Journal | Nat Med | Volume | 20 |
| Issue | 4 | Pages | 419-24 |
| PubMed ID | 24658075 | Mgi Jnum | J:210303 |
| Mgi Id | MGI:5570443 | Doi | 10.1038/nm.3483 |
| Citation | Kim DK, et al. (2014) Inverse agonist of estrogen-related receptor gamma controls Salmonella typhimurium infection by modulating host iron homeostasis. Nat Med 20(4):419-24 |
| abstractText | In response to microbial infection, expression of the defensin-like peptide hepcidin (encoded by Hamp) is induced in hepatocytes to decrease iron release from macrophages. To elucidate the mechanism by which Salmonella enterica var. Typhimurium (S. typhimurium), an intramacrophage bacterium, alters host iron metabolism for its own survival, we examined the role of nuclear receptor family members belonging to the NR3B subfamily in mouse hepatocytes. Here, we report that estrogen-related receptor gamma (ERRgamma, encoded by Esrrg) modulates the intramacrophage proliferation of S. typhimurium by altering host iron homeostasis, and we demonstrate an antimicrobial effect of an ERRgamma inverse agonist. Hepatic ERRgamma expression was induced by S. typhimurium-stimulated interleukin-6 signaling, resulting in an induction of hepcidin and eventual hypoferremia in mice. Conversely, ablation of ERRgamma mRNA expression in liver attenuated the S. typhimurium-mediated induction of hepcidin and normalized the hypoferremia caused by S. typhimurium infection. An inverse agonist of ERRgamma ameliorated S. typhimurium-mediated hypoferremia through reduction of ERRgamma-mediated hepcidin mRNA expression and exerted a potent antimicrobial effect on the S. typhimurium infection, thereby improving host survival. Taken together, these findings suggest an alternative approach to control multidrug-resistant intracellular bacteria by modulating host iron homeostasis. |
