PLoS ONE (Jan 2013)

Tenomodulin expression in the periodontal ligament enhances cellular adhesion.

  • Yuske Komiyama,
  • Shinsuke Ohba,
  • Nobuyuki Shimohata,
  • Keiji Nakajima,
  • Hironori Hojo,
  • Fumiko Yano,
  • Tsuyoshi Takato,
  • Denitsa Docheva,
  • Chisa Shukunami,
  • Yuji Hiraki,
  • Ung-Il Chung

DOI
https://doi.org/10.1371/journal.pone.0060203
Journal volume & issue
Vol. 8, no. 4
p. e60203

Abstract

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Tenomodulin (Tnmd) is a type II transmembrane protein characteristically expressed in dense connective tissues such as tendons and ligaments. Its expression in the periodontal ligament (PDL) has also been demonstrated, though the timing and function remain unclear. We investigated the expression of Tnmd during murine tooth eruption and explored its biological functions in vitro. Tnmd expression was related to the time of eruption when occlusal force was transferred to the teeth and surrounding tissues. Tnmd overexpression enhanced cell adhesion in NIH3T3 and human PDL cells. In addition, Tnmd-knockout fibroblasts showed decreased cell adhesion. In the extracellular portions of Tnmd, the BRICHOS domain or CS region was found to be responsible for Tnmd-mediated enhancement of cell adhesion. These results suggest that Tnmd acts on the maturation or maintenance of the PDL by positively regulating cell adhesion via its BRICHOS domain.