{
  "id": 17701952,
  "title": "Oleic acid suppresses NLRP3 inflammasome activation to prevent dermal macrophage death and limit imiquimod-induced psoriasis",
  "url": "https://urgent.news/2026/11/01/oleic-acid-suppresses-nlrp3-inflammasome-activation-to-prevent-dermal",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-01T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.27.760067v1?rss=1"
  },
  "original_language": "en",
  "account": "Psoriasis is linked to irregular lipid metabolism, such as reduced fatty acid metabolism genes expression and lower circulating oleic acid levels. In a study using an imiquimod mouse model of psoriasis, oral oleic acid supplementation was found to restore serum oleic acid levels and prevent skin thickening and hyperplasia. This was linked to maintaining skin macrophage numbers and lowering key inflammatory markers associated with psoriasis.\n\nUpon investigation, it was discovered that imiquimod triggers dermal macrophage death through NLRP3/caspase-1 inflammasome activation. However, transferring dermal macrophages from affected mice into healthy ones helped to reduce psoriasiform inflammation. In a laboratory setting, oleic acid was able to save macrophages from imiquimod and nigericin-induced death by suppressing NF-{kappa}B and NLRP3/caspase-1 signaling, reducing IL-1{beta} and reactive oxygen species production, and restoring mitochondrial balance, all of which were achieved independently of TLR7. These findings suggest that maintaining dermal macrophage survival is a previously unexplored checkpoint in psoriasiform inflammation, and propose that enhancing lipid metabolic function, rather than just focusing on downstream inflammatory mediators, could serve as a novel strategy to curb tissue-damaging inflammation.",
  "summary": "Psoriasis is associated with altered lipid metabolism, including reduced expression of fatty acid metabolism genes and decreased circulating oleic acid. Here we report that oral oleic acid supplementation normalized serum oleic acid levels and protected from skin thickening and epidermal hyperplasia in a imiquimod mice model of psoriasis. These effects were associated with preserved skin-resident…",
  "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."
}