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dc.contributor.authorHuang, Hsin-Yangen_US
dc.contributor.authorHu, Shang-Hsiuen_US
dc.contributor.authorChian, Chih-Shangen_US
dc.contributor.authorChen, San-Yuanen_US
dc.contributor.authorLai, Hsin-Yien_US
dc.contributor.authorChen, You-Yinen_US
dc.date.accessioned2014-12-08T15:22:59Z-
dc.date.available2014-12-08T15:22:59Z-
dc.date.issued2012en_US
dc.identifier.issn0959-9428en_US
dc.identifier.urihttp://hdl.handle.net/11536/16185-
dc.description.abstractSelf-assembling, crosslinker-free, highly thermosensitive nanocarriers (TSNCs) were synthesized by the incorporation of iron oxide nanoparticles and hydrophobic drug molecules into a thermosensitive matrix composed of PEO-PPO-PEO (F127) triblock-copolymer and polyvinyl alcohol (PVA) using a mini-emulsion process. The addition of PVA significantly contributes to the stability of the thermosensitive PVA-F127 nanocarriers and reduces drug leakage because it provides hydrogen bonds to react with the PEO segments in the shell. The TSNCs exhibit a remarkable triggered size contraction and shrinkage as a result of opposing polymer thermal effects. These effects include thermal expansion of the PVA and thermal shrinkage of the F127 when the magnetic field induced a temperature change that reached 40 to 50 degrees C through heat generation of the magnetic nanoparticles. Depending on the PVA/F127 ratios, the TSNCs can act as a remotely triggered drug delivery platform with a tunable burst drug release profile through the structure deformation by an external magnetic field. Furthermore, the TSNCs also presented ultrasensitive magnetic resonance imaging (MRI), as demonstrated by a relatively high r(2)/r(1) ratio (430). A preliminary in vivo study using the Long-Evans rat model has demonstrated a significant reduction in the spike-wave discharge after the anti-epilepsy drug, ethosuximide (ETX), was burst released from the TSNCs. These results were compared to PVA nanocarriers under the same magnetic induction as the in vitro carriers. Using a well-controlled burst release, these nanocarriers may provide significant advantages as highly temperature-responsive nanocarriers for the treatment of acute diseases.en_US
dc.language.isoen_USen_US
dc.titleSelf-assembling PVA-F127 thermosensitive nanocarriers with highly sensitive magnetically-triggered drug release for epilepsy therapy in vivoen_US
dc.typeArticleen_US
dc.identifier.journalJOURNAL OF MATERIALS CHEMISTRYen_US
dc.citation.volume22en_US
dc.citation.issue17en_US
dc.citation.epage8566en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000302367500056-
dc.citation.woscount14-
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