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Pentablock copolymer dexamethasone nanoformulations elevate MYOC: in vitro liberation, activity and safety in human trabecular meshwork cells.
Agrahari, Vibhuti; Li, Guorong; Agrahari, Vivek; Navarro, Iris; Perkumas, Kristin; Mandal, Abhirup; Stamer, W Daniel; Mitra, Ashim K.
Afiliação
  • Agrahari V; School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64108, USA.
  • Li G; Department of Ophthalmology, Duke University, Durham, NC 27710, USA.
  • Agrahari V; School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64108, USA.
  • Navarro I; Department of Ophthalmology, Duke University, Durham, NC 27710, USA.
  • Perkumas K; Department of Ophthalmology, Duke University, Durham, NC 27710, USA.
  • Mandal A; School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64108, USA.
  • Stamer WD; Department of Ophthalmology, Duke University, Durham, NC 27710, USA.
  • Mitra AK; School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64108, USA.
Nanomedicine (Lond) ; 12(16): 1911-1926, 2017 Aug.
Article em En | MEDLINE | ID: mdl-28756742
AIM: The aim of this study is to examine the elevation of MYOC in long-term treatment of human trabecular meshwork (HTM) cells using dexamethasone (DEX) encapsulated pentablock (PB) copolymer-based nanoparticles (NPs) (DEX-PB-NPs). MATERIALS & METHODS: PB copolymers and DEX-PB-NPs were synthesized and characterized using nuclear magnetic resonance, gel permeation chromatography, and X-ray diffraction analyses. MYOC levels secreted from HTM cells were measured by western blot (WB) analysis. RESULTS: DEX-PB-NPs were formulated in the size range of 109 ± 3.77 nm (n = 3). A long term DEX release from the NPs was observed over three months. Cell viability and cytotoxicity were not affected up to 12 weeks of treatment with PB-copolymer or DEX-PB-NPs. WB data from five HTM cell strains showed that MYOC levels increased by 5.2 ± 1.3, 7.4 ± 4.3, and 2.8 ± 1.1-fold in the presence of DEX-PB-NPs compared with 9.2 ± 3.8, 2.2 ± 0.5, and 1.5 ± 0.3-fold at 4, 8 and 12 weeks in control-DEX treatment group, respectively (n = 5). Based on the decline in MYOC levels after withdrawal of DEX from control wells, DEX-PB-NPs released the DEX for at least 10 weeks. CONCLUSION: The treatment of HTM cells using DEX-PB-NPs were analyzed in this study. The in vitro cell-based system developed here is a valuable tool for determining the safety and effects of steroids released from polymeric NPs.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Malha Trabecular / Dexametasona / Portadores de Fármacos / Glicoproteínas / Corticosteroides / Proteínas do Citoesqueleto / Proteínas do Olho / Nanopartículas Limite: Humans Idioma: En Revista: Nanomedicine (Lond) Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Malha Trabecular / Dexametasona / Portadores de Fármacos / Glicoproteínas / Corticosteroides / Proteínas do Citoesqueleto / Proteínas do Olho / Nanopartículas Limite: Humans Idioma: En Revista: Nanomedicine (Lond) Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido