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Targeted protein delivery:carbodiimide crosslinking influences protein release from microparticles incorporated within collagen scaffolds

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Regenerative Biomaterials 2019年第5期6卷 279-287页

作者： Constantin Edi Tanase omar qutachi Lisa J.White Kevin M.Shakesheff Andrew W.McCaskie Serena M.Best Ruth E.Cameron Department of Materials Science and Metallurgy University of CambridgeCambridge Centre for Medical MaterialsCambridge27Charles Babbage RoadCB30FSUK Centre for Biomolecular Sciences School of PharmacyUniversity of NottinghamUniversity ParkNottingham NG72RDUK Division of Trauma&Orthopaedic Surgery Department of SurgeryUniversity of CambridgeBox 180Addenbrooke’s HospitalHills RoadCambridge CB20QQUK Present address:School of Pharmacy De Montforte UniversityLeicester LE19BHUK

Tissue engineering response may be tailored via controlled,sustained release of active agents from protein-loaded degradable microparticles incorporated directly within three-dimensional(3D)ice-templated collagen ***,the effects of covalent crosslinking during scaffold preparation on the availability and release of protein from the incorporated microparticles have not been ***,we load 3D ice-templated collagen scaffolds with controlled additions of poly-(DL-lactide-co-glycolide)*** probe the effects of subsequent N-(3-dimethylaminopropyl)-N0-ethylcarbodiimide hydrochloride crosslinking on protein release,using microparticles with different internal protein *** isothiocyanate labelled bovine serum albumin is used as a model protein *** scaffolds display a homogeneous microparticle distribution,and a reduction in pore size and percolation diameter with increased microparticle addition,although these values did not fall below those reported as necessary for cell *** protein distribution within the microparticles,near the surface or more deeply located within the microparticles,was important in determining the release profile and effect of crosslinking,as the surface was affected by the carbodiimide crosslinking reaction applied to the *** of microparticles with a high proportion of protein at the surface caused both a reduction and delay in protein *** located within the bulk of the microparticles,was protected from the crosslinking reaction and no delay in the overall release profile was seen.

关键词： collagen scaffolds PLGA microparticles FITC-BSA EDC crosslinking pore size percolation diameter

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