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Transcriptomic analysis of bone transport reveals different functions between both ends.

Maochun Wang1, Jiao Zhang1, Chongxu Qiao1

  • 1Department of Plastic Surgery, The Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.

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|June 9, 2025
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This study reveals distinct molecular pathways for bone healing at tensile and compressive ends during bone transport surgery. Understanding these gene expression patterns can guide new therapies for fracture repair.

Keywords:
bone transportcompressive and tensile endsmyogenesisosteogenesistranscriptomic analysis

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Area of Science:

  • Orthopedic Surgery
  • Molecular Biology
  • Regenerative Medicine

Background:

  • Bone fractures are prevalent in all age groups.
  • Bone transport surgery is vital for severe fractures, defects, and non-unions.
  • Molecular mechanisms of bone healing during transport, especially at different mechanical ends, are unclear.

Purpose of the Study:

  • To investigate differential gene expression in bone healing during rat bone transport.
  • To identify molecular pathways specific to tensile and compressive bone ends.

Main Methods:

  • Transcriptomic analysis of bone tissue from a rat model.
  • Comparison of gene expression between tensile end (TE), compressive end (CE), and control groups.

Main Results:

  • Identified 233 differentially expressed genes (DEGs) in TE and 317 DEGs in CE.
  • TE group showed enrichment in ossification and bone development genes (e.g., Runx2).
  • CE group showed enrichment in myogenesis and muscle development genes (e.g., Myod1).
  • Fifteen DEGs were shared between TE and CE groups, indicating overlapping mechanisms.

Conclusions:

  • Distinct molecular pathways govern bone healing at tensile and compressive ends during bone transport.
  • Shared pathways suggest partially overlapping regenerative processes.
  • Findings can inform targeted therapies to improve bone regeneration and healing outcomes.