Abstract:
:The aim of this study was to investigate intravitreal injection of silk fibroin nanoparticles (SFNs) encapsulating bio-macromolecules, achieving enhanced drug bioavailability, and extended retention in retina. SFNs were prepared with regenerated silk fibroin using desolvation method with fluorescein isothiocyanate labeled bovine serum albumin (FITC-BSA) as bio-macromolecular model drug encapsulated. In vitro physicochemical properties and in vitro drug release of FITC-BSA loaded SFNs (FITC-BSA-SFNs) were evaluated. Cytotoxicity, cellular uptake, and retention of FITC-BSA-SFNs were determined in human retinal pigment epithelial cell line (ARPE-19). In addition, in vivo distribution and safety of intravitreally administered FITC-BSA-SFNs were investigated in New Zealand white rabbits. The particle size of FITC-BSA-SFNs was 179.1 ± 3.7 nm with polydispersity index of 0.102 ± 0.033 and the zeta potential was greater than -25 mV. FITC-BSA-SFNs exhibited excellent biocompatibility with no cytotoxicity observed within 24 and 48 h in AREP-19 cells. Compared to FITC-BSA solution, FITC-BSA-SFNs showed enhanced cellular uptake and prolonged retention. Furthermore, FITC-BSA-SFNs achieved accumulated distribution and extended retention in retina in vivo following intravitreal injection compared to a single administration of free drug solution. Therefore, this bio-macromolecule delivery platform based on SFNs could have great potential in the treatment of posterior segment disorders.
journal_name
Pharm Dev Technoljournal_title
Pharmaceutical development and technologyauthors
Yang P,Dong Y,Huang D,Zhu C,Liu H,Pan X,Wu Cdoi
10.1080/10837450.2018.1545236subject
Has Abstractpub_date
2019-06-01 00:00:00pages
575-583issue
5eissn
1083-7450issn
1097-9867journal_volume
24pub_type
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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journal_title:Pharmaceutical development and technology
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