{
  "id": 3491438,
  "title": "NLRX1 is an essential, druggable regulator of mitochondrial permeability transition",
  "url": "https://urgent.news/2026/08/26/nlrx1-is-an-essential-druggable-regulator-of-mitochondrial",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-26T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.24.746860v1?rss=1"
  },
  "original_language": "en",
  "account": "Recent research has identified a crucial regulator of the mitochondrial permeability transition pore (mPTP), a structure that has long been shrouded in mystery. By utilizing two distinct chemotypes of optimized, brain-penetrant mPTP inhibitors as chemical probes, scientists have discovered that the mitochondrial NOD-like receptor NLRX1 serves as a shared target for these inhibitors. The potency of binding between NLRX1 and the inhibitors correlates with their ability to inhibit the mPTP. Through the use of CRISPR-Cas9-edited human cells and Nlrx1-/- mouse tissues, researchers have proven that NLRX1 is essential for the normal calcium-induced opening of the mPTP. Inhibition of NLRX1 raises the calcium threshold for pore opening, while overexpression of the receptor lowers it, independent of the cyclophilin D protein. NLRX1 interacts with presumed mPTP components, such as ATP synthase and the adenine nucleotide translocase, in a manner sensitive to the compounds used. This protein also plays a role in maintaining mitochondrial protein homeostasis over extended periods. Notably, the lead compound, GSK900, is orally bioavailable, capable of penetrating the brain, and effective in a neurological injury model where the mPTP plays a key role. Collectively, these findings, supported by recent genetic studies, firmly establish NLRX1 as an indispensable, CypD-independent regulator of the mPTP. The development of brain-penetrant chemical tools targeting NLRX1 provides valuable insights into the biological processes associated with this essential regulator.",
  "summary": "The molecular composition of the mitochondrial permeability transition pore (mPTP) remains contested, and several efficacious mPTP inhibitors act through undefined, cyclophilin D (CypD)-independent targets. Using two structurally distinct chemotypes of optimised, brain-penetrant mPTP inhibitors as chemical probes, we applied affinity-based chemoproteomics to identify the mitochondrial NOD-like…",
  "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."
}