| First Author | Charlebois E | Year | 2019 |
| Journal | PLoS One | Volume | 14 |
| Issue | 7 | Pages | e0219835 |
| PubMed ID | 31295319 | Mgi Jnum | J:277309 |
| Mgi Id | MGI:6330866 | Doi | 10.1371/journal.pone.0219835 |
| Citation | Charlebois E, et al. (2019) Hepatocellular heme oxygenase 1 deficiency does not affect inflammatory hepcidin regulation in mice. PLoS One 14(7):e0219835 |
| abstractText | Hepcidin is an iron regulatory peptide hormone that is secreted from hepatocytes and inhibits iron efflux from tissues to plasma. Under inflammatory conditions, hepcidin is transcriptionally induced by IL-6/STAT3 signaling and promotes hypoferremia, an innate immune response to infection. If this pathway remains unresolved, chronic overexpression of hepcidin contributes to the anemia of inflammation, a common medical condition. Previous work showed that carbon monoxide (CO) releasing drugs (CORMs) can attenuate inflammatory induction of hepcidin. Because CO is physiologically generated during heme degradation by heme oxygenase 1 (HO-1), an IL-6-inducible enzyme with anti-inflammatory properties, we hypothesized that hepatocellular HO-1 may operate as a physiological feedback regulator of hepcidin that resolves inflammatory signaling. To address this, we generated and analyzed hepatocyte-specific HO-1 knockout (Hmox1Alb-Cre) mice. We show that these animals mount appropriate hepcidin-mediated hypoferremic response to LPS-induced inflammation, with kinetics similar to those of control Hmox1fl/fl mice. Likewise, primary hepatocytes from Hmox1Alb-Cre and Hmox1fl/fl mice exhibit similar degree and kinetics of hepcidin induction following IL-6 treatment. We conclude that hepatocellular HO-1 has no physiological function on hepcidin regulation by the inflammatory pathway. |
