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Related Experiment Videos

Tissue injury in marrow transdifferentiation.

M Abedi1, D A Greer, G A Colvin

  • 1Department of Research, Roger Williams Medical Center, Providence, RI 02908-4735, USA.

Blood Cells, Molecules & Diseases
|February 6, 2004
PubMed
Summary

Adult bone marrow contains stem cells that can transform into various non-blood cell types. Tissue injury significantly enhances this stem cell plasticity, influencing marrow cell conversion and radiation effects.

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Area of Science:

  • Stem cell biology
  • Regenerative medicine
  • Tissue engineering

Background:

  • Adult bone marrow (BM) harbors cells with the potential to differentiate into diverse non-hematopoietic cell lineages.
  • Recent studies show increased evidence of stem cell plasticity, yet mechanistic insights remain limited.
  • This plasticity involves differentiation into kidney, lung, liver, skin, GI tract, heart, and skeletal muscle cells.

Purpose of the Study:

  • To investigate the mechanistic basis of stem cell plasticity in adult bone marrow.
  • To quantify marrow cell conversion into non-hematopoietic tissues in vivo.
  • To explore the influence of tissue injury and radiation on stem cell plasticity.

Main Methods:

  • Utilized green fluorescent protein (GFP) transgenic mice for cell tracking.

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  • Transplanted bone marrow cells into models for skin, liver, and skeletal muscle plasticity.
  • Induced tissue injury to assess its impact on marrow cell conversion.
  • Evaluated the effect of radiation on the extent of marrow conversion.

    • Main Results:

    • High levels of marrow cell conversion were identified post-transplantation in skin, liver, and skeletal muscle models.
    • Tissue injury was identified as the most critical factor, significantly increasing marrow-to-tissue conversion rates.
    • Radiation exposure was shown to affect the extent of marrow conversion.

    Conclusions:

    • Adult bone marrow cells exhibit significant plasticity, differentiating into multiple non-hematopoietic cell types.
    • Tissue injury is a key driver of stem cell plasticity and marrow cell conversion.
    • Understanding these mechanisms is crucial for advancing regenerative medicine and therapeutic applications.