{
  "id": 6297914,
  "title": "Primordial cardiomyocytes orchestrate myocardial morphogenesis and vascularization but are dispensable for regeneration",
  "url": "https://urgent.news/2026/09/08/primordial-cardiomyocytes-orchestrate-myocardial-morphogenesis-and",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-09-08T00:00:00.000Z",
  "source": {
    "name": "eLife",
    "slug": "elife",
    "url": "https://elifesciences.org/articles/110256"
  },
  "original_language": "en",
  "account": "The vertebrate heart is made up of various types of cardiomyocyte (CM) cells. However, scientists have yet to fully understand the specific roles of different CM subgroups in heart development and repair. To explore this further, researchers conducted a study on adult zebrafish hearts using a technique called single-cell RNA sequencing. This analysis unveiled a distinct group of CM cells, identified by the presence of a gene called phlda2. These cells were found to be different from mature CM cells, which were characterized by a different set of genes related to oxidative metabolism.\n\nThe phlda2 + cells formed a unique primordial CM population situated between compact and trabecular muscle layers in the heart. When these cells were genetically removed during heart development, it caused significant problems. The heart's structure, known as trabeculation and compaction, became disorganized, and the heart's blood vessels, called coronary vessels, were compromised. However, the researchers were surprised to discover that even though these primordial CM cells were crucial during development, their absence did not hinder the heart's ability to heal and form new blood vessels after a section of the heart was removed.\n\nThe study suggests that primordial CM cells play a vital role in shaping the heart's structure during development but are not necessary for the heart's ability to regenerate after injury. The researchers concluded that there is a fundamental difference between how the heart develops and how it regenerates following damage.",
  "summary": "The vertebrate heart is composed of heterogeneous cardiomyocyte (CM) populations; however, the roles of distinct CM subpopulations in heart development and repair remain poorly defined. Here, using single-cell RNA sequencing analysis of adult zebrafish heart, we identified a unique CM subpopulation marked by the expression of phlda2 , which is associated with anaerobic metabolism and different…",
  "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."
}