Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/79382
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dc.contributor.authorSchaller, Teiloen
dc.contributor.authorWenner, Tobiasen
dc.contributor.authorAgrawal, Rupeshen
dc.contributor.authorTeoh, Stephenen
dc.contributor.authorPhua, Li Tingen
dc.contributor.authorLoo, Joachim Say Chyeen
dc.contributor.authorSteele, Terry W. J.en
dc.date.accessioned2015-06-29T02:25:26Zen
dc.date.accessioned2019-12-06T13:23:59Z-
dc.date.available2015-06-29T02:25:26Zen
dc.date.available2019-12-06T13:23:59Z-
dc.date.copyright2015en
dc.date.issued2015en
dc.identifier.citationSchaller, T., Wenner, T., Agrawal, R., Teoh, S., Phua, L. T., Loo, J. S. C., et al. (2015). High throughput screening of valganciclovir in acidic microenvironments of polyester thin films. Materials, 8(4), 1714-1728.en
dc.identifier.issn1996-1944en
dc.identifier.urihttps://hdl.handle.net/10356/79382-
dc.description.abstractGanciclovir and valganciclor are antiviral agents used for the treatment of cytomegalovirus retinitis. The conventional method for administering ganciclovir in cytomegalovirus retinitis patients is repeated intravitreal injections. In order to obviate the possible detrimental effects of repeated intraocular injections, to improve compliance and to eliminate systemic side-effects, we investigated the tuning of the ganciclovir pro-drug valganciclovir and the release from thin films of poly(lactic-co-glycolic acid) (PLGA), polycaprolactone (PCL), or mixtures of both, as a step towards prototyping periocular valganciclovir implants. To investigate the drug release, we established and evaluated a high throughput fluorescence-based quantification screening assay for the detection of valganciclovir. Our protocol allows quantifying as little as 20 ng of valganciclovir in 96-well polypropylene plates and a 50× faster analysis compared to traditional HPLC measurements. This improvement can hence be extrapolated to other polyester matrix thin film formulations using a high-throughput approach. The acidic microenvironment within the polyester matrix was found to protect valganciclovir from degradation with resultant increases in the half-life of the drug in the periocular implant to 100 days. Linear release profiles were obtained using the pure polyester polymers for 10 days and 60 days formulations; however, gross phase separations of PCL and acid-terminated PLGA prevented tuning within these timeframes due to the phase separation of the polymer, valganciclovir, or both.en
dc.language.isoenen
dc.relation.ispartofseriesMaterialsen
dc.rights© 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).en
dc.subjectDRNTU::Engineering::Materialsen
dc.titleHigh throughput screening of valganciclovir in acidic mircoenvironments of polyester thin filmsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen
dc.identifier.doi10.3390/ma8041714en
dc.description.versionPublished versionen
item.fulltextWith Fulltext-
item.grantfulltextopen-
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