Study reveals inflammation-driven RNA errors block liver regeneration after alcohol abuse

Alcohol-associated liver disease can prevent the organ from rebuilding itself even after sobriety, according to a new study published in Nature Communications. The investigation compared healthy livers with those from patients suffering hepatitis or cirrhosis and discovered that damaged cells begin to revert toward a fetal-like progenitor stage but become trapped, unable to complete regeneration. This limbo was traced to inflammation-driven suppression of the RNA-binding protein ESRP2, which caused extensive missplicing of RNA transcripts and mislocalization of key regenerative proteins.

Mice engineered without the ESRP2 gene displayed similar patterns of injury and regeneration failure. When researchers inhibited a specific inflammatory receptor in liver-cell cultures, ESRP2 levels rebounded and RNA splicing improved, suggesting a therapeutic pathway. The authors also propose that aberrant spliced RNAs could serve as biomarkers for diagnosing or monitoring severe alcohol-related liver disease.