Organoid Models Reveal Hepatitis E’s Systemic Threat
A groundbreaking study published in *Gut* demonstrates that Hepatitis E virus (HEV) can infect and replicate within human organoids derived from the liver, intestine, and brain. Using induced pluripotent stem cell (iPSC) technology, researchers created multilineage organoids and infected them with major clinical HEV genotypes. The models revealed extensive viral tropism, with infection occurring in diverse cell types including hepatocytes, intestinal epithelial cells, and neurons. Critically, infection led to measurable organ dysfunction: liver organoids showed impaired synthetic function and markers of injury, intestinal organoids exhibited disrupted barrier integrity, and brain organoids displayed infection across multiple neural lineages. The study also found that the antiviral drug ribavirin could partially reverse these pathological changes, validating the platform for therapeutic research.
Study Significance: This research directly informs the emergency management of viral hepatitis and systemic infection. For clinicians, it underscores that HEV is not solely a hepatotropic virus and may present with or contribute to neurological symptoms or gastrointestinal pathology, complicating differential diagnosis in patients with altered mental status or acute abdomen. The demonstration of antiviral efficacy in a human-derived model accelerates the pipeline for evaluating new treatments for severe HEV infection, a condition for which therapeutic options are currently limited in the acute care setting.
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