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Bone marrow-derived cells in palatal wound healing
J Verstappen1, C Katsaros, R Torensma
1Department of Orthodontics and Oral Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
Oral Diseases
|June 22, 2010
Summary
Bone marrow cells aid palatal wound healing but don't primarily form myofibroblasts. Local cells likely suffice for small cleft palate repairs, minimizing jaw growth disturbances.
Area of Science:
- Regenerative Medicine
- Wound Healing Biology
- Craniofacial Development
Background:
- Myofibroblasts drive scar contraction after cleft palate repair, impacting upper jaw growth.
- Understanding the cellular origins of myofibroblasts is crucial for improving surgical outcomes.
Purpose of the Study:
- To investigate if bone marrow-derived cells are recruited to palatal wounds and differentiate into myofibroblasts.
- To determine the contribution of bone marrow cells to myofibroblast formation in palatal wound healing.
Main Methods:
- Bone marrow transplantation from green fluorescent protein (GFP)-transgenic rats into irradiated wild-type rats.
- Creation of palatal wounds and harvesting of tissue after 2 weeks for analysis.
- Immunostaining to identify and quantify GFP-positive cells, including myofibroblasts, activated fibroblasts, endothelial cells, and myeloid cells.
Main Results:
- Bone marrow-derived cells were detected in blood and bone marrow post-transplantation.
- GFP-positive cells constituted 8.1% of the wound area, with 5.0% of myofibroblasts being bone marrow-derived.
- Myeloid cells showed the highest contribution (22%) from bone marrow, while activated fibroblasts and endothelial cells also showed some contribution.
Conclusions:
- Bone marrow-derived cells contribute to palatal wound healing.
- These cells are not the primary source of myofibroblasts in palatal wounds.
- Local precursor cells appear sufficient for myofibroblast generation in smaller palatal defects.
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