Proangiogenic potential of a collagen/bioactive glass substrate

Ann Leu, Jonathan K Leach

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

Purpose. Previous attempts to stimulate angiogenesis have focused on the delivery of growth factors and cytokines, genes encoding for specific angiogenic inductive proteins or transcription factors, or participating cells. While high concentrations of bioactive glasses have exhibited osteogenic potential, recent studies have demonstrated that low concentrations of particular bioactive glasses are angiogenic. We hypothesized that a well known bioactive glass (Bioglass® 45S5) possesses proangiogenic potential over a limited range of concentrations. Materials and Methods. Varying amounts of Bioglass were loaded into absorbable collagen sponges. The proangiogenic potential of Bioglass was determined by examining the capacity of the soluble products to induce endothelial cell proliferation, tubule formation in a co-culture, and upregulate vascular endothelial growth factor (VEGF) production. Results. We determined a range of Bioglass concentrations which exhibit proangiogenic potential. Furthermore, we demonstrated that the proangiogenic capacity of this material is related to the soluble dissolution products of Bioglass and the subsequent production of cell-secreted angiogenic factors by stimulated cells. Conclusions. These studies suggest that this bioactive glass possesses a robust proangiogenic potential, and this strategy may provide an alternative to recombinant inductive growth factors.

Original languageEnglish (US)
Pages (from-to)1222-1229
Number of pages8
JournalPharmaceutical Research
Volume25
Issue number5
DOIs
StatePublished - May 2008

Fingerprint

Bioactive glass
Glass
Collagen
Substrates
Intercellular Signaling Peptides and Proteins
Angiogenic Proteins
Gene encoding
Angiogenesis Inducing Agents
Endothelial cells
Cell proliferation
Porifera
Coculture Techniques
Cell culture
Vascular Endothelial Growth Factor A
Dissolution
Transcription Factors
Up-Regulation
Endothelial Cells
Cell Proliferation
Cytokines

Keywords

  • Angiogenesis
  • Bioactive glass
  • Endothelial cell
  • Osteogenesis
  • VEGF

ASJC Scopus subject areas

  • Chemistry(all)
  • Pharmaceutical Science
  • Pharmacology

Cite this

Proangiogenic potential of a collagen/bioactive glass substrate. / Leu, Ann; Leach, Jonathan K.

In: Pharmaceutical Research, Vol. 25, No. 5, 05.2008, p. 1222-1229.

Research output: Contribution to journalArticle

Leu, Ann ; Leach, Jonathan K. / Proangiogenic potential of a collagen/bioactive glass substrate. In: Pharmaceutical Research. 2008 ; Vol. 25, No. 5. pp. 1222-1229.
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