{
  "id": 16463165,
  "title": "Doubling stem cell chromosomes produces heart cells with stronger, faster contractions",
  "url": "https://urgent.news/2026/10/25/doubling-stem-cell-chromosomes-produces-heart-cells-with-stronger",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-25T11:00:03.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-10-stem-cell-chromosomes-heart-cells.html"
  },
  "original_language": "en",
  "account": "Researchers at the Regenerative Medicine Project have developed a groundbreaking method for producing heart cells with stronger and faster contractions. By doubling the chromosomes in human induced pluripotent stem cells (iPS cells), they can create cardiomyocytes that more closely resemble mature heart cells. This technique, pioneered by a team led by Yuichiro Miyaoka, involves using cell fusion to generate tetraploid iPS cells, which are then differentiated into cardiomyocytes. Unlike conventional iPS cell-derived cardiomyocytes, which remain immature and fetal-like, these tetraploid cardiomyocytes exhibit gene expression profiles and functional characteristics closer to those of fully mature cardiac cells. This advancement could significantly improve treatments for heart failure, facilitate drug testing, and provide valuable insights into heart disease mechanisms.",
  "summary": "The Regenerative Medicine Project at our institute is advancing therapeutic strategies for various diseases by introducing a range of modifications to human induced pluripotent stem (iPS) cells.",
  "key_points": [
    "Researchers double chromosomes in human iPS cells to create cardiomyocytes.",
    "Tetraploid iPS cells generate heart cells with stronger, faster contractions.",
    "Advancement improves heart failure treatments and heart disease understanding."
  ],
  "editors_take": "Creating tetraploid cells bridges the gap between fetal-like stem cells and mature cardiomyocytes, offering a more accurate biological model for drug testing and advancing potential treatments for heart failure.",
  "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."
}