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• W2901425730 endingPage "652" @default.
• W2901425730 startingPage "641" @default.
• W2901425730 abstract "Camptothecin (CPT), a potent anticancer drug with known antiviral activity, is halted of clinical use. Few drug delivery systems of CPT are approved for therapy. Hereby, we propose the encapsulation of hydrophobic CPT in the inner core of cellulose nanoaggregates for sustained release with retaining of antiproliferative activity. Cellulose conjugates were synthesized by esterification of methyl cellulose, hydroxyethyl cellulose and (hydroxypropyl)methyl cellulose with testosterone, ergocalciferol and dl-α-tocopherol hemisuccinates. The degree of substitution attained ranged from 0.004 to 0.025 and no depolymerization was observed by size exclusion chromatography. ATR-FTIR and NMR spectroscopies confirmed grafting of testosterone and vitamins to celluloses. According to dynamic light scattering, it resulted in their self-assembly in aqueous medium as stable and slightly negatively charged nanoaggregates of 213 to 731 nm. Nanoaggregates formation was also assessed using transmission electron and atomic force microscopies. CPT was encapsulated in the cellulose nanoaggregates, achieving a content of 1.7-13.0 wt %. Sustained release of camptothecin over 150 h was observed in simulated physiological conditions. CPT-loaded cellulose nanoparticles appeared to be possible candidates for chemotherapy, according to observed cytotoxicity against MCF-7 cancer cells." @default.
• W2901425730 created "2018-11-29" @default.
• W2901425730 creator A5022945973 @default.
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• W2901425730 creator A5055838449 @default.
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• W2901425730 date "2019-02-01" @default.
• W2901425730 modified "2023-09-24" @default.
• W2901425730 title "Testosterone- and vitamin-grafted cellulose ethers for sustained release of camptothecin" @default.
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• W2901425730 doi "https://doi.org/10.1016/j.carbpol.2018.11.047" @default.
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• W2901425730 hasPublicationYear "2019" @default.
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