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Healing is the physiological process by which the body restores the integrity and function of damaged tissues following injury. It involves a coordinated interplay of cellular proliferation, extracellular matrix remodeling, and growth factor signaling. The extent and nature of the tissue damage determine whether healing occurs by resolution, regeneration, or replacement.ResolutionResolution represents the most complete form of healing, occurring when the injury is minimal and tissue...
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Related Experiment Video

Updated: May 6, 2026

Murine Excisional Wound Healing Model and Histological Morphometric Wound Analysis
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Lin28: time for tissue repair.

Peter W Reddien1

  • 1Howard Hughes Medical Institute, MIT Biology, and Whitehead Institute, 9 Cambridge Center, Cambridge, MA 02142, USA.

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|November 12, 2013
PubMed
Summary
This summary is machine-generated.

Embryonic gene Lin28a, when activated after birth, significantly enhances tissue repair in mice. This discovery offers new insights into regenerative medicine and improving healing processes in adult mammals.

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Area of Science:

  • Developmental biology
  • Regenerative medicine
  • Molecular biology

Background:

  • Embryonic and juvenile organisms exhibit superior tissue repair capabilities compared to adults.
  • This difference in healing capacity is linked to developmental processes and gene expression patterns.

Purpose of the Study:

  • To investigate the role of Lin28a, a gene normally active during embryonic development, in adult tissue repair.
  • To determine if reactivating embryonic gene pathways can enhance regenerative processes postnatally.

Main Methods:

  • Postnatal activation of the Lin28a gene in adult mice.
  • Induction of tissue injuries, specifically to ears and digits.
  • Assessment of repair efficacy and tissue regeneration following Lin28a activation.

Main Results:

  • Postnatal activation of Lin28a promoted tissue repair exceeding normal adult capabilities.
  • Significant improvements were observed in the healing of ear and digit injuries.
  • Lin28a appears to mediate enhanced regenerative potential in adult tissues.

Conclusions:

  • Lin28a reactivation is a viable strategy to boost tissue repair in adult mammals.
  • This finding opens new avenues for therapeutic interventions in regenerative medicine.
  • Understanding the molecular mechanisms of Lin28a can lead to novel treatments for injury recovery.