The role of sphingosine-1-phosphate signaling pathway in cementocyte mechanotransduction

Han Wang, Tiancheng Li, Xin Wang, Xing Yin, Ning Zhao, Shujuan Zou, Peipei Duan, Lynda F. Bonewald

Research output: Contribution to journalArticlepeer-review

Abstract

Iatrogenic external root resorption can become a serious pathological condition with clinical tooth movement. Little is known regarding how cementum responds to mechanical loading in contrast to bone, especially under compressive stress. In the field of bone biology, several studies have established the contribution of sphingosine-1-phosphate (S1P) signaling in bone remodeling, mechanical transduction and homeostasis. As osteocytes and cementocytes share similar morphological and functional characteristics, this study aimed to investigate the mechanotransduction ability of cementocytes and to explore the contribution of S1P signaling under compressive stress induced mechanotransduction. We found that compressive stress inhibited major S1P signaling and promoted the expression of anabolic factors in IDG-CM6 cells, a novel immortalized murine cementocyte cell line. By inhibiting S1P signaling, we verified that S1P signaling played a vital role in regulating the expression of the mechanotransduction factors prostaglandin E2 (PGE2) and β-catenin, as well as factors responsible for cementogenesis and cementoclastogenesis in IDG-CM6 cells. These results support the hypothesis that cementocytes act as key mechanically responsive cells in cementum, responding to compressive stress and directing local cementum metabolism.

Original languageEnglish (US)
Pages (from-to)595-601
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume523
Issue number3
DOIs
StatePublished - Mar 12 2020

Keywords

  • Cementocyte
  • Compressive stress
  • Mechanotransduction
  • Prostaglandin E2
  • Sphingsosine-1-phosphate
  • β-catenin

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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