Title:Platelet-rich Fibrin Promotes the Proliferation and Osteo-/odontoblastic
Differentiation of Human Dental Pulp Stem Cells
Volume: 18
Issue: 4
Author(s): Jian Zhang*, Jiankun Wu, Xiuya Lin and Xueli Liu
Affiliation:
- Dental Clinic, Cangzhou Central Hospital, No.16 Xinhua West Road, Cangzhou 061000, Hebei, China
Keywords:
Platelet-rich fibrin, immature apical foramen, apical periodontitis, pulp regeneration, notch signaling, osteogenesis.
Abstract:
Background: Pulp regeneration is a promising strategy that promotes the continued development
of young permanent teeth with immature apical foramen. Platelet-rich fibrin (PRF) was found to
stimulate the proliferation and differentiation of osteoblasts, but its effects on osteoblast/odontoblast differentiation
of human dental pulp stem cells (hDPSCs) are unknown.
Methods: The hDPSCs were isolated and identified using known surface markers by flow cytometry. The
CCK-8 assay and the expression of Ki67 and PCNA were used to examine hDPSC proliferation. After 7
days of culture in an osteo-/odontoblastic induction medium with various concentrations of liquid PRF (0,
10% and 20%), the early stage of osteogenesis-intracellular alkaline phosphatase (ALP) was checked.
After 21 days of culture, matrix mineralization was checked using Alizarin Red S and quantified. The
mRNA and protein levels of osteo-/odontoblastic genes, including RUNX2, DSPP, DMP1 and BSP, were
measured by qRT-PCR. The notch signal was checked by Western blot to analyze three key proteins
(Notch 1, Jagged 1 and Hes 1).
Results: PRF-treated groups showed higher expression of Ki-67 and PCNA, higher ALP activity, and the
higher dose showed a stronger induction. PRF promoted osteo-/odontoblastic differentiation of hDPSCs
indicated by elevated protein levels and mRNA levels of the expression of osteo-/odontoblastic markers.
The three key proteins in Notch signaling showed an increase compared with the control group and increased
as the PRF concentration increased.
Conclusion: PRF can promote the proliferation and osteo-/odontoblastic differentiation of hDPSC, which
may be through the Notch signaling pathway.