{
  "id": 17818,
  "title": "Scientists discover why poor sleep may harm some brains more",
  "url": "https://urgent.news/2026/07/31/scientists-discover-why-poor-sleep-may-harm-some-brains-more",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-07-31T12:20:43.000Z",
  "source": {
    "name": "ScienceDaily",
    "slug": "sciencedaily",
    "url": "https://www.sciencedaily.com/releases/2026/07/260729051529.htm"
  },
  "original_language": "en",
  "account": "New research from Edith Cowan University (ECU) reveals that sleep habits and genetics may together impact the subtle brain and cognitive changes linked to Alzheimer's disease, long before symptoms become apparent. The study examined the aquaporin-4 (AQP4) gene, which aids in controlling fluid movement in the brain and supports the organ's waste-clearing system. During sleep, the brain's waste-removal process intensifies, potentially clearing harmful proteins, including those associated with Alzheimer's disease. Researchers discovered that the effects of sleep were influenced by an individual's specific AQP4 gene variant. According to Dr. Ayeisha Milligan Armstrong, those with certain AQP4 variants experienced faster grey matter loss when they reported shorter sleep. While the genetic variant alone could be protective or detrimental depending on sleep patterns, sleep is a modifiable factor that people can influence. The study analyzed 13 AQP4 gene variants, participants' self-reported sleep patterns, brain scans, and cognitive test results. Sleeping fewer hours was linked to a faster decline in grey matter in some participants, while longer sleep onset latency was associated with structural brain changes involving reduced brain volume in others. Cognitive performance also changed differently over time among individuals with sleep disturbances, depending on their AQP4 variant. Dr. Tenielle Porter noted that poor sleep and Alzheimer's risk are known to be linked, but this study suggests that a more personalized approach to Alzheimer's prevention may be necessary, as the impact of poor sleep may vary based on the individual's AQP4 variant. The researchers emphasized the need for further studies to validate these findings and explore the potential of genetic information in tailoring interventions to reduce inherited vulnerabilities and improve long-term brain outcomes associated with Alzheimer's disease.",
  "summary": "A gene involved in the brain’s overnight cleaning system may change how strongly poor sleep affects Alzheimer’s-related brain changes. The findings point toward more personalized prevention strategies based on both genetics and sleep habits.",
  "key_points": [],
  "editors_take": null,
  "illustration": "https://urgent.news/ill/17818.png",
  "coverage": {
    "outlets": 2,
    "also_reported_by": [
      {
        "outlet": "ScienceDaily Health",
        "title": "Scientists discover why poor sleep may harm some brains more",
        "url": "https://urgent.news/2026/07/31/scientists-discover-why-poor-sleep-may-harm-some-brains-more-26090",
        "published": "2026-07-31T12:20:43.000Z"
      }
    ]
  },
  "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."
}