{
  "id": 2256139,
  "title": "Gelsolin protects mitochondria and regulates inflammation during Legionella pneumophila infection",
  "url": "https://urgent.news/2026/08/20/gelsolin-protects-mitochondria-and-regulates-inflammation-during",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-20T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.17.745205v1?rss=1"
  },
  "original_language": "en",
  "account": "Legionella pneumophila is the bacterium responsible for Legionnaires' disease, a serious form of pneumonia. Diagnosing this condition can be challenging, resulting in underreported cases and delayed treatment. Researchers are seeking rapid, broad-spectrum treatments to combat the disease while preventing antibiotic resistance. In a study, mice lacking the gelsolin protein (gsn-/-) experienced quicker and more severe L. pneumophila infections compared to genetically normal mice, even though bacterial loads in the lungs were similar.\n\nThe gsn-/- mice exhibited higher levels of CXCL1/KC, a pro-inflammatory protein, in their macrophages. This inflammatory response led to an increased number of neutrophils and apoptosis (cell death) in the lungs of these mice. Neutrophils without gelsolin produced fewer neutrophil extracellular traps compared to their gelsolin-endowed counterparts. Additionally, the mitochondria in the macrophages of gsn-/- mice were less capable of maintaining their network structure and respiration when exposed to L. pneumophila.\n\nHowever, when gelsolin was introduced to gsn-/- mice in the form of a recombinant protein, they showed improved survival rates during severe L. pneumophila infections. The mice also displayed reduced lung pathology and a diminished inflammatory response in their macrophages when exposed to the bacteria in a laboratory setting. Overall, the findings suggest that gelsolin plays a crucial role in protecting mice from severe L. pneumophila infections, mitigating inflammation, promoting mitochondrial health, and sustaining neutrophil function.",
  "summary": "Legionella pneumophila (L. pneumophila) is the causative agent of Legionnaires' disease, a severe bacterial pneumonia. Difficulty in diagnosing Legionnaires' disease leads to an underreporting of cases and delayed treatment. Rapid-acting, broad-spectrum therapies are needed to treat pathology while avoiding antibiotic resistance. We showed that gelsolin knockout (gsn-/-) mice succumb more quickly…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}