High endogenous expression of parathyroid hormone-related protein (PTHrP) supports osteogenic differentiation in human dental follicle cells
Autor: | Christian Morsczeck, Oliver Pieles, Anja Reck |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
0301 basic medicine
musculoskeletal diseases Intracrine Histology PTHrP Stem cells Bone morphogenetic protein 03 medical and health sciences Osteogenic differentiation Progenitor cell Molecular Biology Dental follicle Original Paper 030102 biochemistry & molecular biology Parathyroid hormone-related protein Chemistry Cell Biology musculoskeletal system Cell biology RUNX2 Medical Laboratory Technology 030104 developmental biology Cell culture Stem cell hormones hormone substitutes and hormone antagonists |
Zdroj: | Histochemistry and Cell Biology |
ISSN: | 1432-119X 0948-6143 |
Popis: | Dental follicle cells (DFCs) are progenitor cells for mineralizing cells such as alveolar osteoblasts, but little is known about the mechanisms of the differentiation. Interestingly, different cell lines sometimes have different potentials to differentiate into mineralizing cells. In this study, we compared two different DFC lines, with one cell line (DFC_B) showing a high alkaline phosphatase (ALP) activity in long-term cultures with standard medium and a reliable mineralizing potential. However, the other cell line DFC_A shows low ALP activity in standard medium and almost no mineralization. Known osteogenic markers such as RUNX2 were similarly expressed in both cell lines. However, the proosteogenic signaling pathway of the bone morphogenetic protein (BMP) is induced in DFC_B, and the parathyroid hormone-related protein (PTHrP), which is involved in tooth root development, was also expressed more strongly. Previous studies have shown that the secreted PTHrP negatively regulate the transition from pre-osteoblastic progenitors to osteoblasts, but we showed that an inhibition of PTHrP gene expression reduced the ALP activity and the BMP-signaling pathway. In addition, endogenously expressed PTHrP is located in the cell nucleus. In contrast, supplementation of PTHrP or an inhibitor for the PTHrP receptor did not affect the ALP activity of DFC_B. In conclusion, our data suggest that a high endogenous expression of PTHrP in DFCs supports the induction of osteogenic differentiation via an intracrine mode. Electronic supplementary material The online version of this article (10.1007/s00418-020-01904-7) contains supplementary material, which is available to authorized users. |
Databáze: | OpenAIRE |
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