Researchers have discovered that a specific type of aging immune cell, dubbed “zombie” cells, plays a key role in liver damage and inflammation. By removing these cells in mice, scientists reversed liver damage even without altering diet—a finding that could pave the way for new treatments for fatty liver disease and age-related organ decline.
The study, published in a peer-reviewed journal, found that these senescent immune cells accumulate with age and high cholesterol, eventually dominating the liver’s immune population in older mice. When researchers selectively eliminated them, liver function improved dramatically, reducing fibrosis and inflammation.
“This is a promising avenue for addressing age-related liver disease,” said a lead researcher involved in the study. “Unlike current treatments that focus on diet or metabolic drugs, targeting these cells directly could offer a more precise therapeutic approach.”
Fatty liver disease affects nearly 25% of adults globally and has no FDA-approved medications. If human trials confirm these findings, the breakthrough could shift how chronic liver conditions are managed.
However, analysts caution that translating mouse studies to humans remains challenging. “While the results are exciting, human biology is more complex,” noted a liver disease specialist unaffiliated with the research. “Long-term safety and efficacy need rigorous testing.”