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• W4221134582 endingPage "1048" @default.
• W4221134582 startingPage "1038" @default.
• W4221134582 abstract "Implantable drug delivery systems offer an alternative for the treatments of long-term conditions (i.e. schizophrenia, HIV, or Parkinson's disease among many others). The objective of the present work was to formulate implantable devices loaded with the model hydrophobic drug olanzapine (OLZ) using robocasting 3D-printing combined with a pre-formed rate controlling membrane. OLZ was selected as a model molecule due to its hydrophobic nature and because is a good example of a molecule used to treat a chronic condition schizophrenia. The resulting implants consisted of a poly(ethylene oxide) (PEO) implant coated with a poly(caprolactone) (PCL)-based membrane. The implants were loaded with 50 and 80% (w/w) of OLZ. They were prepared using an extrusion-based 3D-printer from aqueous pastes containing 36-38% (w/w) of water. The printing process was carried out at room temperature. The resulting implants were characterized by using infrared spectroscopy, scanning electron microscopy, thermal analysis, and X-ray diffraction. Crystals of OLZ were present in the implant after the printing process. In vitro release studies showed that implants containing 50% and 80% (w/w) of OLZ were capable of providing drug release for up to 190 days. On the other hand, implants containing 80% (w/w) of OLZ presented a slower release kinetics. After 190 days, total drug release was ca. 77% and ca. 64% for implants containing 50% and 80% (w/w) of OLZ, respectively. The higher PEO content within implants containing 50% (w/w) of OLZ allows a faster release as this polymer acts as a co-solvent of the drug." @default.
• W4221134582 created "2022-04-03" @default.
• W4221134582 creator A5001311671 @default.
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• W4221134582 date "2022-04-01" @default.
• W4221134582 modified "2023-10-06" @default.
• W4221134582 title "3D-printed implantable devices with biodegradable rate-controlling membrane for sustained delivery of hydrophobic drugs" @default.
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• W4221134582 doi "https://doi.org/10.1080/10717544.2022.2057620" @default.
• W4221134582 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35363100" @default.
• W4221134582 hasPublicationYear "2022" @default.
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