PMID: 11920658Mar 29, 2002Paper

In vitro behavior of albumin-loaded carbonate hydroxyapatite gel

Journal of Biomedical Materials Research
J E BarraletA G A Coombes

Abstract

Hydroxyapatite (HA) powder, porous HA, plasma-sprayed HA, apatite cements, and sintered HA have all been investigated as delivery systems for compounds such as human growth hormone and vancomycin. However, many previous studies showed that the period of release was limited to 2-3 weeks. The concept of using a nanoporous matrix as a means of immobilizing proteins is well known but has largely been confined to silica-based systems. Carbonate hydroxyapatite (CHA) is more soluble in vivo than HA, and when formed as an aqueous precipitate, it is often formed as nanocrystals. This study investigated the release profiles of ovine albumin (OVA) from CHA gel stored in phosphate-buffered saline (PBS) and double distilled water (DDW) for times of up to 1 year. It was found that 7.9% OVA could be loaded onto apatitic gels by means of a purely aqueous process. This process provided a simple low-temperature method of protein adsorption on a high surface area apatitic matrix at physiological pH. The rate of short-term release of OVA was lower from CHA gels than from microcrystalline HA powder. However, the period of release from the CHA gel was short term and may have been associated with recrystallization of the gel. OVA loaded into CHA gel ...Continue Reading

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Citations

May 9, 2007·Journal of Materials Science. Materials in Medicine·Xue Han, Delbert E Day
Oct 19, 2007·Journal of Materials Science. Materials in Medicine·K OzekiY Fukui
Mar 23, 2011·Journal of Materials Science. Materials in Medicine·Jun FeiHong-jun Yu
Jul 20, 2004·Nature Materials·Hong ShenW Mark Saltzman
Apr 9, 2008·Nanomedicine·Loren A PerelmanMichael J Sailor
Jul 19, 2011·Acta Biomaterialia·Andrea EwaldUwe Gbureck
Dec 22, 2009·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Peih-Jeng JiangLiam M Grover
Mar 24, 2005·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·J E BarraletU Gbureck
Feb 29, 2020·Biomaterials Science·Barbara Kupikowska-Stobba, Dorota Lewińska

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