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Researchers identify cellular mechanism that prevents liver repair in alcohol-related disease

A study found that inflammation-driven RNA splicing errors trap liver cells in an incomplete regenerative state even after alcohol use stops.

Updated Aug 31, 2026 · 12:19 UTC1 reports

The short version

  • Researchers from the University of Illinois Urbana-Champaign, Duke University, and the Chan Zuckerberg Biohub Chicago identified why the liver fails to repair itself in advanced alcohol-related liver disease.
  • The study reveals that chronic inflammation disrupts RNA splicing and reduces levels of the protein ESRP2, leaving liver cells stuck in a non-functional state between progenitor and mature adult cells.
  • In laboratory cell cultures, blocking specific inflammatory signals restored ESRP2 levels and normalized RNA splicing.
  • The findings could lead to new diagnostic markers and targeted therapies aimed at restoring tissue regeneration without requiring liver transplants.

Key facts

  • Alcohol-associated liver disease is linked to approximately 3 million deaths annually worldwide and serves as a primary cause of liver-related mortality.[ScienceDaily]
  • The study, published in Nature Communications, examined healthy liver tissues alongside diseased tissue samples provided by Johns Hopkins University Hospital.[ScienceDaily]
  • Researchers found widespread RNA splicing errors across thousands of genes in diseased liver samples, which misdirected essential proteins into the cytoplasm instead of the nucleus.[ScienceDaily]
  • Experiments in mice genetically engineered to lack the ESRP2 protein replicated the liver injury patterns and failed regeneration seen in advanced human alcohol-associated hepatitis.[ScienceDaily]
  • In vitro testing showed that blocking inflammatory receptor signals recovered ESRP2 levels and corrected RNA splicing errors in liver cell cultures.[ScienceDaily]

What remains uncertain

  • Whether interrupting inflammatory pathways or correcting RNA splicing errors will effectively restore liver function in human clinical trials remains unverified.[ScienceDaily]

Sources