Osteopenic bone cell response to strontium-substituted hydroxyapatite

E. Boanini, P. Torricelli, M. Fini, A. Bigi

Research output: Contribution to journalArticlepeer-review

Abstract

Ionic substitution is a powerful tool to improve the biological performance of calcium phosphate based materials. In this work, we investigated the response of primary cultures of rat osteoblasts derived from osteopenic (OOB) bone to strontium substituted hydroxyapatite (SrHA), and to hydroxyapatite (HA) as reference material, compared to normal (N-OB) bone cells. Strontium (Sr) and calcium (Ca) cumulative releases in physiological solution are in agreement with the greater solubility of SrHA than HA, whereas the differences between the two materials are levelled off in DMEM, which significantly reduced ion release. O-OB cells grown on SrHA exhibited higher proliferation and increased values of the differentiation parameters. In particular, Sr substitution increased the levels of proliferation, alkaline phosphatase, and collagen type I, and downregulated the production of interleukin-6 of O-OB cells, demonstrating a promising future of SrHA in the treatment of bone lesions and defects in the presence of osteoporotic bone.

Original languageEnglish
Pages (from-to)2079-2088
Number of pages10
JournalJournal of Materials Science: Materials in Medicine
Volume22
Issue number9
DOIs
Publication statusPublished - Sep 2011

ASJC Scopus subject areas

  • Biophysics
  • Biomaterials
  • Bioengineering
  • Biomedical Engineering

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