Oversulfated chondroitin sulfate-E binds to BMP-4 and enhances osteoblast differentiation

Tatsuya Miyazaki, Satoshi Miyauchi, Akira Tawada, Takahisa Anada, Satoshi Matsuzaka, Osamu Suzuki

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Small leucine-rich proteoglycans, such as biglycan, and their side chain sulfated glycosaminoglycans (GAGs), have been suggested to be involved in bone formation and mineralization processes. The present study was designed to investigate whether chondroitin sulfate (CS), one of the GAG, and its oversulfated structures coupled with bone morphogenetic protein-4 (BMP-4) alter the differentiation and subsequent mineralization of MC3T3-E1 osteoblastic cells. CS-E, one of the oversulfated CS structure, enhanced cell growth, alkaline phosphatase (ALP) activity, collagen deposition, and mineralization whereas heparin enhanced only ALP activity and mineralization. As well as CS-E, CS-H, and CPS also enhanced the mineralization of the cells. CS-E enhanced the mineralization of the cells by interacting with protein in the conditioned medium. CS-E induced mineralization was significantly inhibited by an antibody against BMP-4. The addition of exogenous BMP-4 further increased the capacity of CS-E to enhance mineralization. Fluorescence correlation spectroscopy method using fluoresceinamine-labeled GAG revealed that the oversulfated GAGs have a high affinity for BMP-4. The disaccharide analysis of the cells indicated that MC3T3-E1 cells are capable of producing oversulfated structures of CS by themselves. The lack of CS from the cells after chondroitinase treatment resulted in the inhibition of mineralization. These results in the present study indicate that oversulfated CS, which possesses 4,6-disulfates in N-acetyl-galactosamine, binds to BMP-4 and promotes osteoblast differentiation and subsequent mineralization.

Original languageEnglish
Pages (from-to)769-777
Number of pages9
JournalJournal of cellular physiology
Volume217
Issue number3
DOIs
Publication statusPublished - Dec 1 2008
Externally publishedYes

Fingerprint

Bone Morphogenetic Protein 4
Chondroitin Sulfates
Osteoblasts
Glycosaminoglycans
A73025
Alkaline Phosphatase
Chondroitinases and Chondroitin Lyases
Biglycan
Physiologic Calcification
Galactosamine
Disaccharides
Fluorescence Spectrometry
Conditioned Culture Medium
Cell growth
Osteogenesis
Proteoglycans
Leucine
Heparin
Collagen
Bone

All Science Journal Classification (ASJC) codes

  • Physiology
  • Clinical Biochemistry
  • Cell Biology

Cite this

Oversulfated chondroitin sulfate-E binds to BMP-4 and enhances osteoblast differentiation. / Miyazaki, Tatsuya; Miyauchi, Satoshi; Tawada, Akira; Anada, Takahisa; Matsuzaka, Satoshi; Suzuki, Osamu.

In: Journal of cellular physiology, Vol. 217, No. 3, 01.12.2008, p. 769-777.

Research output: Contribution to journalArticle

Miyazaki, Tatsuya ; Miyauchi, Satoshi ; Tawada, Akira ; Anada, Takahisa ; Matsuzaka, Satoshi ; Suzuki, Osamu. / Oversulfated chondroitin sulfate-E binds to BMP-4 and enhances osteoblast differentiation. In: Journal of cellular physiology. 2008 ; Vol. 217, No. 3. pp. 769-777.
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