Stem/progenitor cells from inflamed human dental pulp retain tissue regeneration potential.

Autor: Alongi DJ; University of Maryland, College of Dental Surgery, MD, USA; and Boston University School of Dental Medicine, Department of Endodontics, Boston, MA 02118, USA., Yamaza T, Song Y, Fouad AF, Romberg EE, Shi S, Tuan RS, Huang GT
Jazyk: angličtina
Zdroj: Regenerative medicine [Regen Med] 2010 Jul; Vol. 5 (4), pp. 617-31.
DOI: 10.2217/rme.10.30
Abstrakt: Background: Potent stem/progenitor cells have been isolated from normal human dental pulps termed dental pulp stem cells (DPSCs). However, it is unknown whether these cells exist in inflamed pulps (IPs).
Aims: To determine whether DPSCs can be identified and isolated from IPs; and if they can be successfully cultured, whether they retain tissue regeneration potential in vivo.
Materials & Methods: DPSCs from freshly collected normal pulps (NPs) and IPs were characterized in vitro and their tissue regeneration potential tested using an in vivo study model.
Results: The immunohistochemical analysis showed that IPs expressed higher levels of mesenchymal stem cell markers STRO-1, CD90, CD105 and CD146 compared with NPs (p < 0.05). Flow cytometry analysis showed that DPSCs from both NPs and IPs expressed moderate to high levels of CD146, stage-specific embryonic antigen-4, CD73 and CD166. Total population doubling of DPSCs-IPs (44.6 + or - 2.9) was lower than that of DPSCs-NPs (58.9 + or - 2.5) (p < 0.05), and DPSCs-IPs appeared to have a decreased osteo/dentinogenic potential compared with DPSCs-NPs based on the mineral deposition in cultures. Nonetheless, DPSCs-IPs formed pulp/dentin complexes similar to DPSCs-NPs when transplanted into immunocompromised mice.
Conclusion: DPSCs-IPs can be isolated and their mesenchymal stem cell marker profiles are similar to those from NPs. Although some stem cell properties of DPSCs-IPs were altered, cells from some samples remained potent in tissue regeneration in vivo.
Databáze: MEDLINE
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