{
  "id": 3769398,
  "title": "Distribution of the glucagon receptor in periventricular brain barrier interfaces including motile and primary cilia in rat brain",
  "url": "https://urgent.news/2026/08/27/distribution-of-the-glucagon-receptor-in-periventricular-brain",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-27T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.24.746618v1?rss=1"
  },
  "original_language": "en",
  "account": "Glucagon, a crucial metabolic hormone responsible for regulating blood sugar levels and appetite, remains largely unexplored in terms of its actions within the brain. This study aimed to investigate the localization of the glucagon receptor (GCGR) in specific regions of the rat brain, including periventricular brain barrier interfaces. Utilizing immunohistochemical and immunofluorescence techniques, researchers found that GCGR was notably enriched in the proximal region of motile ependymal cilia lining the ventricles. Furthermore, the hormone's receptor was detected in tanycytic primary cilia and cytoplasmic extensions within the hypothalamus. Additionally, immunostaining was observed in ciliated cells of the subcommissural organ, as well as more sparsely in choroid plexus epithelium and associated primary cilia. Importantly, other circumventricular organs did not exhibit detectable GCGR. These findings not only unveil previously unrecognized sites of glucagon receptor localization in the brain but also propose that glucagon signaling at brain barrier interfaces could play a role in integrating peripheral metabolic signals with central homeostatic mechanisms.",
  "summary": "Glucagon is a key metabolic hormone regulating blood glucose and appetite, yet little is known about its actions within the brain. Here, we investigated its receptor (GCGR) localization in periventricular brain barrier interfaces in young rats using immunohistochemical and immunofluorescence approaches. GCGR was enriched in the proximal region of motile ependymal cilia lining the ventricles, as…",
  "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."
}