Abstract:
:Bone loss through traumatic injury is a significant clinical issue. Researchers have created many scaffold types to mimic an extracellular matrix to provide structural support for the formation of new bone, however functional regeneration of larger scaffolds has not been fully achieved. Newer scaffolds aim to deliver bioactive molecules to improve tissue regeneration. To achieve a more comprehensive regenerative response, a magnetically triggerable polymeric microparticle platform is developed for the on-demand release of a complex mixture of isolated human placental proteins. This system is composed of polycaprolactone (PCL) microparticles, encapsulating magnetic nanoparticles (MNPs), and placental proteins. When subjected to an alternating magnetic field (AMF), the MNPs heat and melt the PCL, enhancing the diffusion of proteins from microparticles. When the field is off, the PCL re-solidifies. This potentially allows for cyclic drug delivery. Here the design, synthesis, and proof-of-concept experiments for this system are reported. In addition, it is shown that the proteins retain function after being magnetically released. The ability to trigger the release of complex protein mixtures on-demand may provide a significant advantage with wounds where stagnation of healing processes can occur (e.g., large segmented bone defects).
journal_name
Macromol Bioscijournal_title
Macromolecular bioscienceauthors
Lanier OL,Ficarrotta JM,Adjei I,Wable D,Lewis C,Nacea C,Sharma B,Dobson J,McFetridge Pdoi
10.1002/mabi.202000249subject
Has Abstractpub_date
2021-01-01 00:00:00pages
e2000249issue
1eissn
1616-5187issn
1616-5195journal_volume
21pub_type
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