Augmenter of liver regeneration (ALR) Is a novel biomarker of hepatocellular stress/inflammation: In vitro, in vivo and in silico studies

Yoram Vodovotz, John Prelich, Claudio Lagoa, Derek Barclay, Ruben Zamora, Noriko Murase, Chandrashekhar R. Gandhi

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The liver is a central organ involved in inflammatory processes, including the elaboration of acute-phase proteins. Augmenter of liver regeneration (ALR) protein, expressed and secreted by hepatocytes, promotes liver regeneration and maintains viability of hepatocytes. ALR also stimulates secretion of inflammatory cytokines (tumor necrosis factor [TNF]-α and interleukin [IL]-6) and nitric oxide from Kupffer cells. We hypothesized that ALR may be involved in modulating inflammation induced by various stimuli. We found that hepatic ALR levels are elevated at 24 h, before or about the same time as an increase in the mRNA expression of TNF-α and IL-6, after portacaval shunt surgery in rats. Serum ALR also increased, but significantly only on d 4 when pathological changes in the liver become apparent. In rats, serum ALR was elevated after intraperitoneal administration of lipopolysaccharide alone and in a model of gram-negative sepsis. Serum ALR increased before alanine aminotransferase (ALT) in endotoxemia and in the same general time frame as TNF-α and IL-6 in the bacterial sepsis model. Furthermore, mathematical prediction of tissue damage correlated strongly with alterations in serum ALR in a mouse model of hemorrhagic shock. In vitro, monomethyl sulfonate, TNF-α, actinomycin D and lipopolysaccharide all caused increased release of ALR from rat hepatocytes, which preceded the loss of cell viability and/or inhibition of DNA synthesis. ALR may thus serve as a potential diagnostic marker of hepatocellular stress and/or acute inflammatory conditions.

Original languageEnglish
Pages (from-to)1424-1429
Number of pages6
JournalMolecular medicine (Cambridge, Mass.)
Volume18
Issue number11
DOIs
StatePublished - 10 Oct 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Augmenter of liver regeneration (ALR) Is a novel biomarker of hepatocellular stress/inflammation: In vitro, in vivo and in silico studies'. Together they form a unique fingerprint.

Cite this