{
  "id": 6145414,
  "title": "Mitochondrial DNA mutations may help turn aging hearts toward failure",
  "url": "https://urgent.news/2026/09/07/mitochondrial-dna-mutations-may-help-turn-aging-hearts-toward-failure",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-07T15:40:03.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-09-mitochondrial-dna-mutations-aging-hearts.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "Researchers at Karolinska Institutet have shown that mutations in mitochondrial DNA (mtDNA), which accumulate in many tissues as we age, can actively contribute to impaired heart function. Until now, it has been difficult to determine whether these mutations are a cause of age-related heart dysfunction or simply a consequence of aging.",
  "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."
}