Periostin, dentin matrix protein 1 and P2rx7 ion channel in human teeth and periodontal ligament

Ann Anat. 2018 Mar;216:103-111. doi: 10.1016/j.aanat.2017.12.004. Epub 2017 Dec 28.


The periostin is a matricellular protein present in the human periodontal ligament and human dental pulp-derived cells lines, that up-regulates the in vitro expression of some genes involved in the dentin mineralization, such as dentin matrix protein 1 and P2x7-ion channel receptor. Here we investigated the distribution of periostin in human teeth and periodontal ligaments, mapping in parallel the localization of dentin matrix protein 1 and P2x7-ion channel receptor to establish whether or not they are expressed in the same places as periostin. The periodontal ligament and the subodontoblastic layer of the dental pulp displayed strong periostin immunoreactivity, whereas dentin matrix protein 1 was detected in the periodontal ligament co-localized with periostin in the vicinity of the cement. The P2x7 ion channel receptor was regularly absent in both the periodontal ligament and dental tissues, but in some cases, it was observed in the odontoblasts. Present results demonstrate the occurrence of periostin in the healthy adult human tooth without co-localization with proteins involved in tooth mineralization, the expression of which it regulates. These results might serve as a baseline for future studies on pathological conditions.

Keywords: Dentin matrix protein 1; Human; Matricellular proteins; P2x7 ion channel receptor; Periostin; Tooth.

MeSH terms

  • Adult
  • Cell Adhesion Molecules / analysis
  • Cell Adhesion Molecules / metabolism*
  • Dental Cementum
  • Dental Pulp / chemistry
  • Extracellular Matrix Proteins / analysis
  • Extracellular Matrix Proteins / metabolism*
  • Female
  • Humans
  • Immunohistochemistry
  • Male
  • Odontoblasts / chemistry
  • Periodontal Ligament / chemistry*
  • Phosphoproteins / analysis
  • Phosphoproteins / metabolism*
  • Receptors, Purinergic P2X7 / analysis
  • Receptors, Purinergic P2X7 / metabolism*
  • Tooth / chemistry*
  • Young Adult


  • Cell Adhesion Molecules
  • DMP1 protein, human
  • Extracellular Matrix Proteins
  • P2RX7 protein, human
  • POSTN protein, human
  • Phosphoproteins
  • Receptors, Purinergic P2X7