Effects of expansive force on the differentiation of midpalatal suture cartilage in rats

Ichiro Takahashi, I. Mizoguchi, M. Nakamura, Y. Sasano, S. Saitoh, M. Kagayama, H. Mitani

Research output: Contribution to journalArticle

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Abstract

In an attempt to clarify the effects of biomechanical tensional force on chondrogenic and osteogenic differentiation of secondary cartilage, the midpalatal sutures of 4-week-old Wistar male rats were expanded by orthodontic wires which applied 20 g force for 4, 7, 10, and 14 days. The differentiation pathways in the midpalatal suture cartilage were examined by immunohistochemistry for osteocalcin, type I and type II collagen, and von Kossa histochemistry. Although the midpalatal sutures of the control animals consisted mainly of two separate secondary cartilages with mesenchyme-like cells at their midlines, type I collagen-rich fibrous tissue began to appear at day 4 and increased at the midline of the cartilage with days of experiment. At the end of the experiment, type I collagen-rich and calcified bone matrix appeared at the boundary between the precartilaginous and the cartilaginous cell layers. Most of the cartilaginous tissues were separated from each other and the midpalatal suture was replaced by osteocalcin-positive intramembranous bone and fibrous sutural tissue. These results strongly suggest that tensional force changed the phenotypic expression of collagenous components in secondary cartilage, which may reflect the differentiation pathway of osteochondro progenitor cells.

Original languageEnglish
Pages (from-to)341-348
Number of pages8
JournalBone
Volume18
Issue number4
DOIs
Publication statusPublished - Jan 1 1996
Externally publishedYes

Fingerprint

Sutures
Cartilage
Collagen Type I
Osteocalcin
Orthodontic Wires
Bone Matrix
Collagen Type II
Mesoderm
Wistar Rats
Stem Cells
Immunohistochemistry
Bone and Bones

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Physiology
  • Histology

Cite this

Takahashi, I., Mizoguchi, I., Nakamura, M., Sasano, Y., Saitoh, S., Kagayama, M., & Mitani, H. (1996). Effects of expansive force on the differentiation of midpalatal suture cartilage in rats. Bone, 18(4), 341-348. https://doi.org/10.1016/8756-3282(96)00012-9

Effects of expansive force on the differentiation of midpalatal suture cartilage in rats. / Takahashi, Ichiro; Mizoguchi, I.; Nakamura, M.; Sasano, Y.; Saitoh, S.; Kagayama, M.; Mitani, H.

In: Bone, Vol. 18, No. 4, 01.01.1996, p. 341-348.

Research output: Contribution to journalArticle

Takahashi, I, Mizoguchi, I, Nakamura, M, Sasano, Y, Saitoh, S, Kagayama, M & Mitani, H 1996, 'Effects of expansive force on the differentiation of midpalatal suture cartilage in rats', Bone, vol. 18, no. 4, pp. 341-348. https://doi.org/10.1016/8756-3282(96)00012-9
Takahashi, Ichiro ; Mizoguchi, I. ; Nakamura, M. ; Sasano, Y. ; Saitoh, S. ; Kagayama, M. ; Mitani, H. / Effects of expansive force on the differentiation of midpalatal suture cartilage in rats. In: Bone. 1996 ; Vol. 18, No. 4. pp. 341-348.
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