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Harmine promotes molar root development via SMAD1/5/8 phosphorylation.

Naoki Fujiwara1, Ji-Won Lee2, Mika Kumakami-Sakano1

  • 1Division of Developmental Biology and Regenerative Medicine, Department of Anatomy, Iwate Medical University, Yahaba, Iwate, Japan.

Biochemical and Biophysical Research Communications
|December 19, 2017
PubMed
Summary

Harmine (HMN) is a natural compound that promotes tooth root and periodontal tissue development. This study shows HMN stimulates key cells involved in tooth germ growth, making it a novel therapeutic candidate.

Keywords:
Cell movementCell proliferationHertwig's epithelial root sheathNatural small compoundPostnatal developmentTooth root

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Regenerative Medicine

Background:

  • Tooth and bone share calcification pathways.
  • Harmine (HMN) is a natural compound known to stimulate osteoblast differentiation.

Purpose of the Study:

  • To investigate the effect of Harmine on postnatal development of molar tooth roots and periodontal tissues.
  • To explore HMN's impact on tooth germ development and underlying molecular mechanisms.

Main Methods:

  • Organ culture of tooth germs.
  • In vitro cell culture of Hertwig's epithelial root sheath (HERS)-derived cells.
  • Analysis of cell proliferation, movement, and SMAD1/5/8 phosphorylation.

Main Results:

  • HMN supported tooth root and periodontal tissue formation in developing tooth germs.
  • HMN promoted HERS elongation and stimulated cell proliferation in HERS and dental follicle-derived tissues.
  • HMN directly induced SMAD1/5/8 phosphorylation in HERS-derived cells, indicating a specific signaling pathway activation.

Conclusions:

  • Harmine is the first natural small compound identified to stimulate postnatal tooth germ development.
  • HMN shows potential for promoting tooth root and periodontal tissue regeneration.