DSPP effects on in vivo bone mineralization

Kostas Verdelis, Yunfeng Ling, Taduru Sreenath, Naoto Haruyama, Mary MacDougall, Marjolein C.H. van der Meulen, Lyudmila Lukashova, Lyudmila Spevak, Ashok B. Kulkarni, Adele L. Boskey

Research output: Contribution to journalArticle

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Abstract

Dentin sialophosphoprotein has been implicated in the mineralization process based on the defective dentin formation in Dspp null mice (Dspp-/-). Dspp is expressed at low levels in bone and Dspp-/- femurs assessed by quantitative micro-computed tomography (micro-CT) and Fourier transform infrared spectroscopic imaging (FTIRI) exhibit some mineral and matrix property differences from wildtype femurs in both developing and mature mice. Compared to wildtype, Dspp-/- mice initially (5 weeks) and at 7 months had significantly higher trabecular bone volume fractions and lower trabecular separation, while at 9 months, bone volume fraction and trabecular number were lower. Cortical bone mineral density, area, and moments of inertia in Dspp-/- were reduced at 9 months. By FTIRI, Dspp-/- animals initially (5 months) contained more stoichiometric bone apatite with higher crystallinity (crystal size/perfection) and lower carbonate substitution. This difference progressively reversed with age (significantly decreased crystallinity and increased acid phosphate content in Dspp-/- cortical bone by 9 months of age). Mineral density as determined in 3D micro-CT and mineral-to-matrix ratios as determined by 2D FTIRI in individual cortical and trabecular bones were correlated (r2 = 0.6, p < 0.04). From the matrix analysis, the collagen maturity of both cortical and trabecular bones was greater in Dspp-/- than controls at 5 weeks; by 9 months this difference in cross-linking pattern did not exist. Variations in mineral and matrix properties observed at different ages are attributable, in part, to the ability of the Dspp gene products to regulate both initial mineralization and remodeling, implying an effect of Dspp on bone turnover.

Original languageEnglish
Pages (from-to)983-990
Number of pages8
JournalBone
Volume43
Issue number6
DOIs
Publication statusPublished - Dec 1 2008

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Physiologic Calcification
Minerals
Fourier Analysis
Bone and Bones
Femur
Tomography
Apatites
Bone Remodeling
Carbonates
Dentin
Bone Density
Collagen
Phosphates
Acids
Cortical Bone
Genes
Cancellous Bone

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Physiology
  • Histology

Cite this

Verdelis, K., Ling, Y., Sreenath, T., Haruyama, N., MacDougall, M., van der Meulen, M. C. H., ... Boskey, A. L. (2008). DSPP effects on in vivo bone mineralization. Bone, 43(6), 983-990. https://doi.org/10.1016/j.bone.2008.08.110

DSPP effects on in vivo bone mineralization. / Verdelis, Kostas; Ling, Yunfeng; Sreenath, Taduru; Haruyama, Naoto; MacDougall, Mary; van der Meulen, Marjolein C.H.; Lukashova, Lyudmila; Spevak, Lyudmila; Kulkarni, Ashok B.; Boskey, Adele L.

In: Bone, Vol. 43, No. 6, 01.12.2008, p. 983-990.

Research output: Contribution to journalArticle

Verdelis, K, Ling, Y, Sreenath, T, Haruyama, N, MacDougall, M, van der Meulen, MCH, Lukashova, L, Spevak, L, Kulkarni, AB & Boskey, AL 2008, 'DSPP effects on in vivo bone mineralization', Bone, vol. 43, no. 6, pp. 983-990. https://doi.org/10.1016/j.bone.2008.08.110
Verdelis K, Ling Y, Sreenath T, Haruyama N, MacDougall M, van der Meulen MCH et al. DSPP effects on in vivo bone mineralization. Bone. 2008 Dec 1;43(6):983-990. https://doi.org/10.1016/j.bone.2008.08.110
Verdelis, Kostas ; Ling, Yunfeng ; Sreenath, Taduru ; Haruyama, Naoto ; MacDougall, Mary ; van der Meulen, Marjolein C.H. ; Lukashova, Lyudmila ; Spevak, Lyudmila ; Kulkarni, Ashok B. ; Boskey, Adele L. / DSPP effects on in vivo bone mineralization. In: Bone. 2008 ; Vol. 43, No. 6. pp. 983-990.
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