Circ_0081572 inhibits the progression of periodontitis through regulating the miR-378h/RORA axis

Arch Oral Biol. 2021 Apr:124:105053. doi: 10.1016/j.archoralbio.2021.105053. Epub 2021 Jan 23.


Objectives: Revealing the role and mechanism of circ_0081572 in periodontitis progression.

Design: Quantitative real-time PCR (qRT-PCR) was applied to measure the expression of circ_0081572, microRNA (miR)-378h and retinoid acid-related orphan receptor A (RORA). Lipopolysaccharide (LPS) was used to treat periodontal ligament cells (PDLCs) to construct periodontitis cell model in vitro. Cell counting kit 8 (CCK8) assay and flow cytometry were used to measure cell viability and apoptosis. The caspase 3 activity was detected by Caspase 3 Activity Assay Kit. Western blot assay was performed to detect the expression of apoptosis-associated proteins and RORA. The inflammation response and oxidative stress were determined by detecting the levels of inflammatory cytokines and reactive oxygen species (ROS). The relationship between miR-378h and circ_0081572 or RORA was verified by dual-luciferase reporter assay, RNA immunoprecipitation (RIP) assay and biotin-labeled RNA pull-down assay.

Results: Circ_0081572 was a stability circRNA with downregulated expression in the gingival tissues of periodontitis patients. Overexpression of circ_0081572 could alleviate LPS-induced PDLCs injury. Circ_0081572 could serve as a sponge for miR-378h. Furthermore, miR-378h could reverse the inhibition of circ_0081572 on LPS-induced PDLCs injury. In addition, RORA could be targeted by miR-378h, and its silencing could reverse the suppressive effect of miR-378h inhibitor and circ_0081572 overexpression on LPS-induced PDLCs injury.

Conclusions: Our results suggested that circ_0081572 might prevent periodontitis by regulating the miR-378h /RORA axis.

Keywords: LPS; Periodontitis; RORA; circ_0081572; miR-378h.

MeSH terms

  • Apoptosis
  • Cell Proliferation
  • Humans
  • MicroRNAs* / genetics
  • Nuclear Receptor Subfamily 1, Group F, Member 1
  • Periodontitis* / genetics
  • Periodontitis* / prevention & control
  • RNA, Circular


  • MicroRNAs
  • Nuclear Receptor Subfamily 1, Group F, Member 1
  • RNA, Circular
  • RORA protein, human