{
  "id": 18107852,
  "title": "Biological Signaling Pathways Associated with Late Tendon Development in Chicken Embryos and Their Dependence on Mechanical Stimulation",
  "url": "https://urgent.news/2026/11/04/biological-signaling-pathways-associated-with-late-tendon-development",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-11-04T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.11.02.763759v1?rss=1"
  },
  "original_language": "en",
  "account": "During the embryonic and early neonatal stages, chicken tendons undergo rapid mechanical and structural transformations, marked by elevated collagen levels, heightened crosslinking, and extended fibril lengths. While these changes are partly influenced by mechanical cues, how they drive tendon maturation into robust, load-bearing tissues is still largely unclear. To unravel these mechanisms, researchers employed an embryonic chick model, conducting a comprehensive analysis of tendon gene expression during late embryonic development (E16, E18, and E20) and in embryos subjected to rigid and flaccid paralysis.\n\nBy employing bulk RNA sequencing, gene set enrichment analysis, and transcription factor analysis, the study produced a detailed transcriptomic profile of the tendons at different developmental stages and under different conditions. Furthermore, two differential expression analysis models were used to enhance the reliability of the findings. The results pointed to a significant surge in transcriptomic activity between embryonic day 16 and 20, with paralysis conditions showing a more pronounced effect compared to controls.\n\nThe analysis revealed a positive enrichment in processes associated with mechanotransduction, extracellular matrix remodeling, cell adhesion, and contractility, indicating their importance in tendon development. Candidate pathways that become upregulated with development include TGF-β, PI3K-AKT-mTOR, Hippo, circadian rhythm, and focal adhesion signaling. In embryos treated with paralysis, the data suggested disruptions in extracellular matrix remodeling and mechanotransduction processes. Both modes of paralysis were linked to a cellular stress response and a reduction in WNT signaling.\n\nThe findings collectively identify potential mechanotransduction pathways that are linked to late tendon maturation and are affected by paralysis. Such insights could pave the way for new approaches in tendon tissue engineering and regenerative medicine strategies.",
  "summary": "During embryonic and neonatal development, tendons exhibit rapid changes in mechanics and structure, including increases in collagen content, crosslinking, and fibril length. These functional and structural changes are partly dependent on mechanical stimulation. However, the specific mechanobiological mechanisms driving these changes remain poorly understood. The objective of this study was to…",
  "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."
}