| First Author | Duran-Güell M | Year | 2021 |
| Journal | FASEB J | Volume | 35 |
| Issue | 2 | Pages | e21365 |
| PubMed ID | 33496031 | Mgi Jnum | J:309542 |
| Mgi Id | MGI:6758437 | Doi | 10.1096/fj.202001615RRR |
| Citation | Duran-Guell M, et al. (2021) Albumin protects the liver from tumor necrosis factor alpha-induced immunopathology. FASEB J 35(2):e21365 |
| abstractText | Besides its oncotic power, albumin exerts pleiotropic actions, including binding, transport, and detoxification of endogenous and exogenous molecules, antioxidant activity, and modulation of immune and inflammatory responses. In particular, recent studies have demonstrated that albumin reduces leukocyte cytokine production. Here, we investigated whether albumin also has the ability to protect tissues from the damaging actions of these inflammatory mediators. We circumscribed our investigation to tumor necrosis factor (TNF) alpha, which exemplifies the connection between immunity and tissue injury. In vivo experiments in analbuminemic mice showed that these mice exhibit a more pronounced response to a model of TNFalpha-mediated liver injury induced by the administration of lipopolysaccharide (LPS) and D-galactosamine (D-gal). A tissue protective action against LPS/D-gal liver injury was also observed during the administration of human albumin to humanized mice expressing the human genes for albumin and neonatal Fc receptor (hAlb(+/+) /hFcRn(+/+) ) with preestablished carbon tetrachloride (CCl4 )-induced early cirrhosis. The cytoprotective actions of albumin against TNFalpha-induced injury were confirmed ex vivo, in precision-cut liver slices, and in vitro, in primary hepatocytes in culture. Albumin protective actions were independent of its scavenging properties and were reproduced by recombinant human albumin expressed in Oryza sativa. Albumin cytoprotection against TNFalpha injury was related to inhibition of lysosomal cathepsin B leakage accompanied by reductions in mitochondrial cytochrome c release and caspase-3 activity. These data provide evidence that in addition to reducing cytokines, the albumin molecule also has the ability to protect tissues against inflammatory injury. |
