{
  "id": 14984299,
  "title": "Atypical T cell receptor signalling permits distinct gut gd T cell responses to healthy versus dysregulated tissues",
  "url": "https://urgent.news/2026/10/16/atypical-t-cell-receptor-signalling-permits-distinct-gut-gd-t-cell",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-16T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.09.757810v1?rss=1"
  },
  "original_language": "en",
  "account": "Intraepithelial lymphocytes (IEL), a type of T cell found throughout vertebrates, are often dominated by {gamma}{delta} T cells. These cells rely on communication between their T cell receptors (TCRs) and butyrophilin-like (BTNL) proteins present on healthy enterocytes and colonocytes. However, it remains unclear how BTNL interaction prevents these interactions from triggering full-blown T cell activation, which could harm the body's barrier.\n\nIn this study, researchers examined a unique TCR signaling pathway (Signal 1) that occurs following BTNL engagement. This signal prevents both overall protein synthesis and cell proliferation. The pathway can be inhibited through external means, such as providing a co-stimulator (Signal 2) or adding inflammatory cytokines (Signal 3). Additionally, the pathway can be relieved internally by inhibiting a specific lipid phosphatase, which helps maintain the cells' normal function in healthy tissues.\n\nThese discoveries provide insight into how IEL can remain continuously active in healthy tissues while also allowing for robust responses when tissue undergoes perturbation. This finding sheds light on the delicate balance between maintaining barrier integrity and enabling adaptive immune responses when needed.",
  "summary": "Intraepithelial lymphocytes (IEL) are conserved across vertebrates and commonly enriched in {gamma}{delta} T cells. Several such {gamma}{delta} IELs depend upon homeostatic interactions of their T cell receptors (TCRs) with butyrophilin-like (BTNL) proteins expressed by healthy enterocytes and colonocytes. What limits such interactions from inducing full-blown T cell activation which would…",
  "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."
}