Effects of hypoxic condition on osteogenic differentiation of human periodontal ligament cells via hypoxia in⁃ ducible factor⁃1α
Objective To investigate the effects of hypoxia on osteogenic differentiation of periodontal ligament cells (PDLCs) and the role of hypoxia inducible factor⁃1α (HIF⁃1α) in this process. Methods Human PDLCs were iso⁃ lated and identified by checking the expression of vimentin and cytokeratin. PDLCs...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal of Prevention and Treatment for Stomatological Diseases
2017-08-01
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| Series: | 口腔疾病防治 |
| Subjects: | |
| Online Access: | http://www.kqjbfz.com/EN/10.12016/j.issn.2096-1456.2017.08.003 |
| Summary: | Objective To investigate the effects of hypoxia on osteogenic differentiation of periodontal ligament
cells (PDLCs) and the role of hypoxia inducible factor⁃1α (HIF⁃1α) in this process. Methods Human PDLCs were iso⁃
lated and identified by checking the expression of vimentin and cytokeratin. PDLCs were cultured in normoxia (20% O2)
or hypoxia (1% O2) for 12⁃72 h. Changes of alkaline phosphatase (ALP) activity and mRNA expressions of osteogenic
markers ALP, collagen⁃I (COL1) and runt related transcription factor 2 (RUNX2) were detected. Western blot was used
to detect the expression of HIF⁃1α. After transfected with HIF1α⁃siRNA, the expressions of HIF⁃1αand osteogenic dif⁃
ferentiation markers were furthered detected. The statistics were analyzed with SPSS13.0. Results Positive vimentin
but negative cytokeratin were observed in primary cultured PDLCs. ALP activity and mRNA expressions of ALP, COL1
and RUNX2 were decreased in PDLCs in hypoxia for 48 h, while HIF⁃1α expression was increased. After knocking down of HIF ⁃ 1α with siRNA, HIF ⁃ 1α was significantly reduced in PDLCs under hypoxia, while ALP activity and
mRNA expressions of osteogenic markers were significantly increased. Conclusion Hypoxia may inhibit osteogenic
differentiation of PDLCs via upregulated HIF⁃1α. |
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| ISSN: | 2096-1456 2096-1456 |