Journal
BIOMACROMOLECULES
Volume 11, Issue 10, Pages 2653-2659Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm1006344
Keywords
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Funding
- VENI
- Dutch Technology Foundation STW, Applied Science Division of NWO [10700]
- Ministry of Economic Affairs
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Gelatin microspheres are well-known for their capacity to release growth factors in a controlled manner. but gelatin microspheres do not calcify in the absence of so-called bioactive substances that induce deposition it calcium phosphate (CaP) bone-mineral. This study has investigated if CaP nanocrystals can be incorporated into gelatin microspheres to render these inert rnicrospheres bioactive without compromising the drug releasing properties of gelatin mierospheres: Incorporation of CaP nanocrystals into gelatin microspheres resulted into reduced biodegradation and drug release rates; whereas their calcifying capacity increased strongly compared to inert gelatin microspheres. The reduced drug release rate was correlated to the reduced degradation rate as caused by a physical cross-linking effect of CaP nanocrystals dispersed in the gelatin matrix. Consequently, these composite microspheres combine beneficial drug-releasing properties of organic gelatin with the calcifying capacity of a dispersed CaP phase.
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