{
  "id": 10719115,
  "title": "Ether glycerophospholipid control of peroxisome degradation confers protection from ischemia",
  "url": "https://urgent.news/2026/09/29/ether-glycerophospholipid-control-of-peroxisome-degradation-confers",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-29T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.28.755133v1?rss=1"
  },
  "original_language": "en",
  "account": "Ether glycerophospholipids, a critical component of peroxisomes, play a vital role in protecting cells from ischemic damage, according to recent research. These lipids, which make up about 20% of a cell's phospholipid content, are synthesized within peroxisomes and contain an alkyl chain linked to a head group by an ether bond. The enzyme Fatty acyl-CoA-reductase 1 (FAR1), the key player in peroxisomal ether lipid metabolism, has been identified as a peroxisome receptor essential for degradation under hypoxic conditions.\n\nWhen oxygen levels are low, FAR1 facilitates the degradation of peroxisomes by interacting with the ATG8-family protein LC3B, which is crucial for autophagy - a process of cellular recycling and waste disposal. Hypoxia, or oxygen deprivation, increases the abundance of choline ether lipids, triggering autophagy activation and peroxisome degradation. The enzyme activity of FAR1 and its ability to bind LC3B are both necessary for this process to occur.\n\nInterestingly, the absence of multiple peroxisomal ether lipid metabolism components hinders peroxisome degradation both in cell cultures and in living organisms. Additionally, mice genetically engineered to express Far1 as a direct target of Hypoxia Inducible Factor 1 (HIF) demonstrate peroxisome degradation under chronic HIF activation. Importantly, enhancing ether lipid levels using ether lipid precursors activates autophagy, leading to cardioprotection against ischemic injury.\n\nThese findings shed light on the crucial role of ether lipids in maintaining peroxisome homeostasis under oxygen limitation, providing a potential therapeutic target for managing ischemic injury.",
  "summary": "Ether glycerophospholipids (ether lipids) are a subclass of glycerophospholipids that are synthesized at the peroxisome and constitute nearly 20% of the total phospholipid content in metazoans. Biochemically, ether lipids have an alkyl chain attached by an ether bond at the sn-1 position of the glycerol backbone (alkyl-ether) primarily containing choline or ethanolamine head groups. Some ether…",
  "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."
}