scholarly journals Mechanical stress alters protein O‐GlcNAc in human periodontal ligament cells

2019 ◽  
Vol 23 (9) ◽  
pp. 6251-6259 ◽  
Author(s):  
Dorottya Frank ◽  
Annamária Cser ◽  
Béla Kolarovszki ◽  
Nelli Farkas ◽  
Attila Miseta ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Periodontal Ligament ◽  
Periodontal Ligament Cells ◽  
Human Periodontal Ligament Cells

scholarly journals Intermittent Compressive Stress Enhanced Insulin-Like Growth Factor-1 Expression in Human Periodontal Ligament Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jittima Pumklin ◽  
Jeeranan Manokawinchoke ◽  
Kanokporn Bhalang ◽  
Prasit Pavasant
Keyword(s):  
Mechanical Stress ◽  
Compressive Stress ◽  
Periodontal Ligament ◽  
Molecular Mechanisms ◽  
Treated Group ◽  
Periodontal Ligament Cells ◽  
Human Periodontal Ligament Cells ◽  
Chemical Inhibitors

Mechanical force was shown to promote IGF-1 expression in periodontal ligament both in vitro and in vivo. Though the mechanism of this effect has not yet been proved, here we investigated the molecular mechanism of intermittent mechanical stress on IGF-1 expression. In addition, the role of hypoxia on the intermittent compressive stress on IGF-1 expression was also examined. In this study, human periodontal ligament cells (HPDLs) were stimulated with intermittent mechanical stress for 24 hours. IGF-1 expression was examined by real-time polymerase chain reaction. Chemical inhibitors were used to determine molecular mechanisms of these effects. For hypoxic mimic condition, the CoCl2 supplementation was employed. The results showed that intermittent mechanical stress dramatically increased IGF-1 expression at 24 h. The pretreatment with TGF-β receptor I or TGF-β1 antibody could inhibit the intermittent mechanical stress-induced IGF-1 expression. Moreover, the upregulation of TGF-β1 proteins was detected in intermittent mechanical stress treated group. Correspondingly, the IGF-1 expression was upregulated upon being treated with recombinant human TGF-β1. Further, the hypoxic mimic condition attenuated the intermittent mechanical stress and rhTGF-β1-induced IGF-1 expression. In summary, this study suggests intermittent mechanical stress-induced IGF-1 expression in HPDLs through TGF-β1 and this phenomenon could be inhibited in hypoxic mimic condition.

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