PMID- 22889715 OWN - NLM STAT- MEDLINE DCOM- 20130219 LR - 20120924 IS - 1873-4995 (Electronic) IS - 0168-3659 (Linking) VI - 162 IP - 3 DP - 2012 Sep 28 TI - Bone repair: new developments in growth factor delivery systems and their mathematical modeling. PG - 502-20 LID - S0168-3659(12)00608-6 [pii] LID - 10.1016/j.jconrel.2012.07.041 [doi] AB - More and more of our aging populations will suffer from large bone defects in the next few years. But the growth factor (GF) delivery systems (DSs) currently under investigation will help overcome the limitations of the bone grafts presently used. Some GFDSs accredited by the Food and Drug Administration (FDA) are commercially available, but they have mechanical, structural and GF retention weaknesses. New studies focus on polymers and the composition of GFs in order to mimic as closely as possible the physiological environment of healing bone. This review first summarizes the process of endochondral bone healing and the major cytokines involved. We then review the latest GFDSs, with their combinations of organic, inorganic, natural and synthetic biomaterials, the kinetics of GF release and their biological effects. We will explore new research avenues such as the use of peptides derived from bone morphogenetic proteins, including our own results, and the sequential release of bone-inducing GFs. We then review the latest mathematical models of drug delivery systems (DDSs) for several transport phenomena that may be encountered when using GFDS. The final section discusses new improvements for GFDS modeling. CI - Copyright (c) 2012 Elsevier B.V. All rights reserved. FAU - Lauzon, Marc-Antoine AU - Lauzon MA AD - Department of Chemical and Biotechnological Engineering, Universite de Sherbrooke, 2500 Boul. de l'Universite, Sherbrooke, Quebec J1K 2R1, Canada. FAU - Bergeron, Eric AU - Bergeron E FAU - Marcos, Bernard AU - Marcos B FAU - Faucheux, Nathalie AU - Faucheux N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20120806 PL - Netherlands TA - J Control Release JT - Journal of controlled release : official journal of the Controlled Release Society JID - 8607908 RN - 0 (Intercellular Signaling Peptides and Proteins) SB - IM MH - Animals MH - Bone Regeneration MH - *Drug Delivery Systems MH - Humans MH - Intercellular Signaling Peptides and Proteins/*administration & dosage MH - *Models, Theoretical EDAT- 2012/08/15 06:00 MHDA- 2013/02/21 06:00 CRDT- 2012/08/15 06:00 PHST- 2012/03/13 00:00 [received] PHST- 2012/07/29 00:00 [revised] PHST- 2012/07/31 00:00 [accepted] PHST- 2012/08/15 06:00 [entrez] PHST- 2012/08/15 06:00 [pubmed] PHST- 2013/02/21 06:00 [medline] AID - S0168-3659(12)00608-6 [pii] AID - 10.1016/j.jconrel.2012.07.041 [doi] PST - ppublish SO - J Control Release. 2012 Sep 28;162(3):502-20. doi: 10.1016/j.jconrel.2012.07.041. Epub 2012 Aug 6.