Long-term cell-mediated protein release from calcium phosphate ceramics

Wernike, E; Hofstetter, W; Liu, Y; Wu, G; Sebald, HJ; Wismeijer, D; Hunziker, EB; Siebenrock, KA; Klenke, FM (2010). Long-term cell-mediated protein release from calcium phosphate ceramics. Journal of biomedical materials research, 92(2), pp. 463-74. Hoboken, N.J.: John Wiley & Sons 10.1002/jbm.a.32411

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Efficient delivery of growth factors from carrier biomaterials depends critically on the release kinetics of the proteins that constitute the carrier. Immobilizing growth factors to calcium phosphate ceramics has been attempted by direct adsorption and usually resulted in a rapid and passive release of the superficially adherent proteins. The insufficient retention of growth factors limited their bioavailability and their efficacy in the treatment of bone regeneration. In this study, a coprecipitation technique of proteins and calcium phosphate was employed to modify the delivery of proteins from biphasic calcium phosphate (BCP) ceramics. To this end, tritium-labeled bovine serum albumin ([(3)H]BSA) was utilized as a model protein to analyze the coprecipitation efficacy and the release kinetics of the protein from the carrier material. Conventional adsorption of [(3)H]BSA resulted in a rapid and passive release of the protein from BCP ceramics, whereas the coprecipitation technique effectively prevented the burst release of [(3)H]BSA. Further analysis of the in vitro kinetics demonstrated a sustained, cell-mediated release of coprecipitated [(3)H]BSA from BCP ceramics induced by resorbing osteoclasts. The coprecipitation technique described herein, achieved a physiologic-like protein release, by incorporating [(3)H]BSA into its respective carriers, rendering it a promising tool in growth factor delivery for bone healing.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Knochenbiologie & Orthopädische Forschung
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Knochenbiologie & Orthopädische Forschung

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Orthopädische Chirurgie
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Orthopädische Chirurgie

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Center of Regenerative Medicine for Skeletal Tissues (discontinued)
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Center of Regenerative Medicine for Skeletal Tissues (discontinued)

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Wernike, Ellen; Hofstetter, Willy; Liu, Yuelian; Sebald, Hans-Jörg; Hunziker, Ernst Bruno; Siebenrock, Klaus-Arno and Klenke, Frank M.

ISSN:

0021-9304

Publisher:

John Wiley & Sons

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:07

Last Modified:

04 May 2014 23:04

Publisher DOI:

10.1002/jbm.a.32411

PubMed ID:

19195029

Web of Science ID:

000273364300006

URI:

https://boris.unibe.ch/id/eprint/268 (FactScience: 197224)

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