Synthesis and characterization of fluorescein isothiocyanate (FITC)-labeled PEO–PCL–PEO triblock copolymers for topical delivery

We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)- block-poly(ɛ-caprolactone)- block-poly(ethylene oxide) (PEO–PCL–PEO) triblock copolymers and their applications for tracking the penetration behavior of FITC-labeled copolymers in the hairless mouse skin. In...

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Published inPolymer (Guilford) Vol. 50; no. 11; pp. 2357 - 2364
Main Authors Cho, Heui Kyoung, Lone, Saifullah, Kim, Dae Duk, Choi, Joon Ho, Choi, Sung Wook, Cho, Jin Hun, Kim, Jung Hyun, Cheong, In Woo
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 22.05.2009
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Abstract We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)- block-poly(ɛ-caprolactone)- block-poly(ethylene oxide) (PEO–PCL–PEO) triblock copolymers and their applications for tracking the penetration behavior of FITC-labeled copolymers in the hairless mouse skin. In the first step, PEO–PCL diblock copolymers with different ratios of PCL to PEO (i.e., [CL]/[EO]) were prepared by ring opening polymerization of ɛ-caprolactone (CL), where monomethoxy poly(ethylene glycol) (mPEG, M n = 2000 g mol −1) was used as a macro-initiator. FITC was successively reacted with octadecylamine, isophorone diisocyanate (IPDI), and then used as a linker to obtain PEO–PCL–PEO triblock copolymers from the PEO–PCL diblock copolymers. In aqueous solution, both FITC-labeled triblock copolymers show two UV absorption peaks at 489 and 455 nm, attributed to the monomeric FITC and H-aggregated FITC moieties, respectively. Due to the strong H-aggregation of FITC in the copolymer of high [CL]/[EO], fluorescent emission intensities considerably decreased at high concentrations of the copolymer. FITC-labeled copolymers exhibited more sharper polarized optical and fluorescence microscopic images compared to the mixtures of FITC and unlabeled copolymer in both solid crystalline and multiple emulsion state. Furthermore, the Frantz diffusion cell test was carried out to demonstrate the penetration behavior of the FITC-labeled copolymers in the hairless mouse skin. ▪
AbstractList We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)- block-poly(ɛ-caprolactone)- block-poly(ethylene oxide) (PEO–PCL–PEO) triblock copolymers and their applications for tracking the penetration behavior of FITC-labeled copolymers in the hairless mouse skin. In the first step, PEO–PCL diblock copolymers with different ratios of PCL to PEO (i.e., [CL]/[EO]) were prepared by ring opening polymerization of ɛ-caprolactone (CL), where monomethoxy poly(ethylene glycol) (mPEG, M n = 2000 g mol −1) was used as a macro-initiator. FITC was successively reacted with octadecylamine, isophorone diisocyanate (IPDI), and then used as a linker to obtain PEO–PCL–PEO triblock copolymers from the PEO–PCL diblock copolymers. In aqueous solution, both FITC-labeled triblock copolymers show two UV absorption peaks at 489 and 455 nm, attributed to the monomeric FITC and H-aggregated FITC moieties, respectively. Due to the strong H-aggregation of FITC in the copolymer of high [CL]/[EO], fluorescent emission intensities considerably decreased at high concentrations of the copolymer. FITC-labeled copolymers exhibited more sharper polarized optical and fluorescence microscopic images compared to the mixtures of FITC and unlabeled copolymer in both solid crystalline and multiple emulsion state. Furthermore, the Frantz diffusion cell test was carried out to demonstrate the penetration behavior of the FITC-labeled copolymers in the hairless mouse skin. ▪
We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)-block-poly(?-caprolactone)-block-poly(ethylene oxide) (PEO-PCL-PEO) triblock copolymers and their applications for tracking the penetration behavior of FITC-labeled copolymers in the hairless mouse skin. In the first step, PEO-PCL diblock copolymers with different ratios of PCL to PEO (i.e., [CL]/[EO]) were prepared by ring opening polymerization of ?-caprolactone (CL), where monomethoxy poly(ethylene glycol) (mPEG, M@dn=2000gmol@u-@u1) was used as a macro-initiator. FITC was successively reacted with octadecylamine, isophorone diisocyanate (IPDI), and then used as a linker to obtain PEO-PCL-PEO triblock copolymers from the PEO-PCL diblock copolymers. In aqueous solution, both FITC-labeled triblock copolymers show two UV absorption peaks at 489 and 455nm, attributed to the monomeric FITC and H-aggregated FITC moieties, respectively. Due to the strong H-aggregation of FITC in the copolymer of high [CL]/[EO], fluorescent emission intensities considerably decreased at high concentrations of the copolymer. FITC-labeled copolymers exhibited more sharper polarized optical and fluorescence microscopic images compared to the mixtures of FITC and unlabeled copolymer in both solid crystalline and multiple emulsion state. Furthermore, the Frantz diffusion cell test was carried out to demonstrate the penetration behavior of the FITC-labeled copolymers in the hairless mouse skin.
Author Choi, Sung Wook
Cheong, In Woo
Cho, Heui Kyoung
Lone, Saifullah
Kim, Dae Duk
Kim, Jung Hyun
Choi, Joon Ho
Cho, Jin Hun
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  organization: Department of Applied Chemistry, Kyungpook National University, 1370 Sankyuk-3-dong, Buk-gu, Daegu 702-701, South Korea
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Issue 11
Keywords Fluorescein isothiocyanate
PEO–PCL–PEO
Biodegradable
Ring opening polymerization
Fluorescence spectrum
Fluorescent tracer
Drug carrier
PEO-PCL-PEO
Caprolactone copolymer
Labelled copolymer
Spherulites
Water oil water emulsion
Molecular aggregation
Amphiphilic polymer
Transdermal system
Control release polymer
Rodentia
Ethylene oxide copolymer
Experimental study
Absorption spectrum
Monodispersed polymer
Vertebrata
Triblock copolymer
Mammalia
Mouse
Animal
Morphology
Preparation
Concentration effect
Aqueous solution
Topical administration
Language English
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Snippet We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)- block-poly(ɛ-caprolactone)- block-poly(ethylene oxide)...
We present the synthesis of fluorescein isothiocyanate (FITC)-labeled poly(ethylene oxide)-block-poly(?-caprolactone)-block-poly(ethylene oxide) (PEO-PCL-PEO)...
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SubjectTerms Applied sciences
Biodegradable
Biological and medical sciences
Exact sciences and technology
Fluorescein isothiocyanate
General pharmacology
Medical sciences
Organic polymers
PEO–PCL–PEO
Pharmaceutical technology. Pharmaceutical industry
Pharmacology. Drug treatments
Physicochemistry of polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Title Synthesis and characterization of fluorescein isothiocyanate (FITC)-labeled PEO–PCL–PEO triblock copolymers for topical delivery
URI https://dx.doi.org/10.1016/j.polymer.2009.03.032
https://search.proquest.com/docview/34538555
Volume 50
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