Journal
ACTA BIOMATERIALIA
Volume 21, Issue -, Pages 2-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2015.03.013
Keywords
Core-shell design; Therapeutic scaffolds; Drug delivery; Cell encapsulation; Tissue engineering
Funding
- Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI) [HI14C0522]
- Priority Research Centers Program through the National Research Foundation (NRF), Republic of Korea [2009-0093829]
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Scaffolds that secure and deliver therapeutic ingredients like signaling molecules and stem cells hold great promise for drug delivery and tissue engineering. Employing a core-shell design for scaffolds provides a promising solution. Some unique methods, such as co-concentric nozzle extrusion, microfluidics generation, and chemical confinement reactions, have been successful in producing core-shelled nano/microfibers and nano/microspheres. Signaling molecules and drugs, spatially allocated to the core and/or shell part, can be delivered in a controllable and sequential manner for optimal therapeutic effects. Stem cells can be loaded within the core part on-demand, safely protected from the environments, which ultimately affords ex vivo culture and in vivo tissue engineering. The encapsulated cells experience three-dimensional tissue-mimic microenvironments in which therapeutic molecules are secreted to the surrounding tissues through the semi-permeable shell. Tuning the material properties of the core and shell, changing the geometrical parameters, and shaping them into proper forms significantly influence the release behaviors of biomolecules and the fate of the cells. This topical issue highlights the immense usefulness of core-shell designs for the therapeutic actions of scaffolds in the delivery of signaling molecules and stem cells for tissue regeneration and disease treatment. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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