›› 2017, Vol. 37 ›› Issue (5): 385-389.

• Basic Research •     Next Articles

Effect of IL-17 on modulating the expression of RANKL and OPG in periodontal ligament cells under hypoxia

  

  • Received:2016-11-25 Revised:2016-12-29 Online:2017-05-28 Published:2017-05-19

Abstract: Objective To investigate the effect of IL-17 on modulating the expression of RANKL and OPG in human periodontal ligament cells(hPDLCs)under hypoxia. Methods Human PDLCs were incubated in the normoxia (normal oxygen tension) and different hypoxic atmospheres (oxygen volume fraction 10%, 5%, 2%) for 24 hours. After that, cell proliferation assay was determined using CCK-8 technique. The expression levels of RANKL and OPG were determined by western blotting and real-time PCR. Results Human PDLCs proliferation increased in the normoxia and the hypoxic atmosphere of 10% O and 5% O and had a positive correlation with time in a time-dependent manner while the hPDLCs proliferation was inhibited in the hypoxic atmosphere of 2% O. With the decrease of oxygen concentration under hypoxia, OPG mRNA and protein levels were up-regulated at first and then down-regulated meanwhile RANKL mRNA and protein levels were up-regulated after stimulated by hypoxia. Conclusions The relative RANKL/OPG expression ratios increase mostly in a hypoxic atmosphere of 5% O, suggesting that moderate hypoxia can modulate the alveolar remodeling via regulating the expressions of pro-osteoplastic molecules of hPDLCs through IL-17.

Key words: Hypoxia, periodontal ligament cells, IL-17, HIF-1α, RANKL, OPG

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