Increase of galanin in trigeminal ganglion during tooth movement

T. Deguchi, T. Yabuuchi, R. Ando, H. Ichikawa, T. Sugimoto, T. Takano-Yamamoto

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


It is known that nerve fibers containing neuropeptides such as galanin increase in the periodontal ligament during experimental tooth movement. However, the origin of galanin-containing nerve fibers in the periodontal ligament remains unclear. This study was conducted to examine our hypothesis that the increased galanin nerve fibers have a sensory neuronal origin, and that the peptide is associated with pain transmission and/or periodontal ligament remodeling during experimental tooth movement. In control rats, galanin-immunoreactive trigeminal ganglion cells were very rare and were observed predominantly in small ganglion cells. After 3 days of experimental tooth movement, galanin-immunoreactive trigeminal ganglion cells significantly increased, and the most marked increase was observed at 5 days after experimental tooth movement. Furthermore, their cell size spectrum also significantly changed after 3 and 5 days of movement: Medium-sized and large trigeminal ganglion cells began expressing, and continued to express, galanin until 14 days after experimental tooth movement. These findings suggest that the increase of galanin in the periodontal ligament during experimental tooth movement at least partially originates from trigeminal ganglion neurons and may play a role in pain transmission and/or periodontal remodeling.

Original languageEnglish
Pages (from-to)658-663
Number of pages6
JournalJournal of dental research
Issue number7
Publication statusPublished - Jul 2006
Externally publishedYes


  • Galanin
  • Rat
  • Tooth movement
  • Trigeminal ganglion

ASJC Scopus subject areas

  • General Dentistry


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