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Human dental pulp vasculogenesis evaluated by CD34 antigen expression and morphological arrangement
O Trubiani1, D Tripodi, T Delle Fratte
1Dipartimento di Scienze Odontostomatologiche, Università di Chieti, Via dei Vestini 32, 66100 Chieti, Italy. tribiani@unich.it
Journal of Dental Research
|August 27, 2003
Summary
New blood vessel formation in human dental pulp begins with CD34+ cells. This vasculogenesis process continues into adulthood, aiding dental tissue homeostasis and structural adjustments.
Area of Science:
- Dentistry
- Vascular Biology
- Cell Biology
Background:
- Vasculogenesis is the formation of new blood vessels from endothelial precursor cells.
- Understanding dental pulp vascularization is crucial for tissue homeostasis and regeneration.
- CD34 is a marker for hematopoietic progenitor cells and endothelial progenitor cells.
Purpose of the Study:
- To investigate the process of vasculogenesis in human dental pulp.
- To characterize the topography and cellular mechanisms of dental pulp vascularization.
- To examine the role of CD34+ cells in dental pulp angiogenesis.
Main Methods:
- Morphological examination of dental pulps from deciduous and permanent teeth using light and electron microscopy.
- Immunohistochemical analysis for the expression of CD34.
- Correlation of cellular morphology with CD34 expression patterns.
Main Results:
- Vasculogenesis in dental pulp is a complex process initiated by single CD34+ cells.
- These cells form solid vascular cords that subsequently canalize to form lumens.
- Pericytes are integrated into the basement membrane of mature microvessels.
- CD34+ endothelial cells are present in permanent teeth, indicating ongoing vasculogenesis.
Conclusions:
- Vasculogenesis is an active process in human dental pulp throughout life.
- CD34+ cells are key players in the formation and remodeling of dental pulp vasculature.
- This continuous vascularization supports dental tissue homeostasis and functional adaptation.