14 research outputs found

    āļāļēāļĢāđ€āļ•āļĢāļĩāļĒāļĄāđāļĨāļ°āļāļēāļĢāļĻāļķāļāļĐāļēāļ„āļļāļ“āļŠāļĄāļšāļąāļ•āļīāļ‚āļ­āļ‡āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™ Preparation and Characterization of Curcumin-loaded Bovine Serum Albumin Nanoparticles

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    āļšāļ—āļ„āļąāļ”āļĒāđˆāļ­ āļ§āļąāļ•āļ–āļļāļ›āļĢāļ°āļŠāļ‡āļ„āđŒ: āđ€āļžāļ·āđˆāļ­āļĻāļķāļāļĐāļēāļŦāļēāļ§āļīāļ˜āļĩāļāļēāļĢāđ€āļ•āļĢāļĩāļĒāļĄāļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™ āđ€āļžāļ·āđˆāļ­āđƒāļŦāđ‰āļĄāļĩāļ„āļļāļ“āļŠāļĄāļšāļąāļ•āļīāļ—āļēāļ‡āđ€āļ„āļĄāļĩāļŸāļīāļŠāļīāļāļŠāđŒāđāļĨāļ°āļ›āļĢāļīāļĄāļēāļ“āļāļēāļĢāļāļąāļāđ€āļāđ‡āļšāļĒāļēāļ•āļēāļĄāļ•āđ‰āļ­āļ‡āļāļēāļĢ āļ§āļīāļ˜āļĩāļāļēāļĢāļĻāļķāļāļĐāļē:  āđ€āļ•āļĢāļĩāļĒāļĄāļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āļ‚āļ­āļ‡āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™āļ”āđ‰āļ§āļĒāļ§āļīāļ˜āļĩāļ”āļĩāđ‚āļ‹āļĨāđ€āļ§āļŠāļąāđˆāļ™ āđ‚āļ”āļĒāđ„āļĄāđˆāđƒāļŠāđ‰āļāļĨāļđāļ•āļēāļĢāđŒāļ­āļąāļĨāļ”āļĩāļŪāļąāļĒāļ”āđŒāđ€āļ›āđ‡āļ™āļŠāļēāļĢāļāđˆāļ­āļ„āļĢāļ­āļŠāļĨāļīāļ‡āļ„āđŒ āđāļĨāļ°āļĻāļķāļāļĐāļēāļŠāļ āļēāļ§āļ°āļ•āđˆāļēāļ‡ āđ† āđƒāļ™āļāļēāļĢāđ€āļ•āļĢāļĩāļĒāļĄ āđ„āļ”āđ‰āđāļāđˆ āļ„āļ§āļēāļĄāđ€āļ‚āđ‰āļĄāļ‚āđ‰āļ™āļ‚āļ­āļ‡āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™ āđāļĨāļ°āļ­āļąāļ•āļĢāļēāļŠāđˆāļ§āļ™āđ‚āļ”āļĒāļ›āļĢāļīāļĄāļēāļ•āļĢāļ‚āļ­āļ‡āļ™āđ‰āļģāļ•āđˆāļ­āđ€āļ­āļ—āļēāļ™āļ­āļĨ āļ—āļĩāđˆāļĄāļĩāļœāļĨāļ•āđˆāļ­āļ‚āļ™āļēāļ”āļ­āļ™āļļāļ āļēāļ„ āļāļēāļĢāļāļĢāļ°āļˆāļēāļĒāļ‚āļ­āļ‡āļ‚āļ™āļēāļ”āļ­āļ™āļļāļ āļēāļ„ āđāļĨāļ°āļĻāļąāļāļĒāđŒāđ„āļŸāļŸāđ‰āļēāļšāļ™āļœāļīāļ§āļ­āļ™āļļāļ āļēāļ„ āļĢāļ§āļĄāļ—āļąāđ‰āļ‡āļ§āļīāļ˜āļĩāļāļēāļĢāļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™āļ—āļĩāđˆāđāļ•āļāļ•āđˆāļēāļ‡āļāļąāļ™ 3 āļ§āļīāļ˜āļĩāļĨāļ‡āđƒāļ™āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āļ—āļĩāđˆāļŠāđˆāļ‡āļœāļĨāļ•āđˆāļ­āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđāļĨāļ°āļ›āļĢāļīāļĄāļēāļ“āļāļēāļĢāļāļąāļāđ€āļāđ‡āļšāļĒāļē āļœāļĨāļāļēāļĢāļĻāļķāļāļĐāļē: āļāļēāļĢāđ€āļžāļīāđˆāļĄāļ„āļ§āļēāļĄāđ€āļ‚āđ‰āļĄāļ‚āđ‰āļ™āļ‚āļ­āļ‡āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļĢāļ§āļĄāļ—āļąāđ‰āļ‡āļ›āļĢāļīāļĄāļēāļ“āļ™āđ‰āļģāđƒāļ™āļŠāđˆāļ§āļ™āļœāļŠāļĄāļ™āđ‰āļģ-āđ€āļ­āļ—āļēāļ™āļ­āļĨ āļ—āļģāđƒāļŦāđ‰āļ‚āļ™āļēāļ”āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āđƒāļŦāļāđˆāļ‚āļķāđ‰āļ™ āđāļĨāļ°āļ›āļĢāļ°āļˆāļļāđ„āļŸāļŸāđ‰āļēāļĨāļšāļšāļ™āļœāļīāļ§āļ­āļ™āļļāļ āļēāļ„āļĨāļ”āļĨāļ‡ āļŠāļ āļēāļ§āļ°āļāļēāļĢāđ€āļ•āļĢāļĩāļĒāļĄāļ—āļĩāđˆāđ€āļŦāļĄāļēāļ°āļŠāļĄāļ„āļ·āļ­ āļ„āļ§āļēāļĄāđ€āļ‚āđ‰āļĄāļ‚āđ‰āļ™āļ‚āļ­āļ‡āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļĢāđ‰āļ­āļĒāļĨāļ° 20 āđ‚āļ”āļĒāļ™āđ‰āļģāļŦāļ™āļąāļ āđāļĨāļ°āļ­āļąāļ•āļĢāļēāļŠāđˆāļ§āļ™āđ‚āļ”āļĒāļ›āļĢāļīāļĄāļēāļ•āļĢāļ‚āļ­āļ‡āļ™āđ‰āļģāļ•āđˆāļ­āđ€āļ­āļ—āļēāļ™āļ­āļĨ 1:6 āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āļ‚āļ­āļ‡āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™āļ—āļĩāđˆāđ€āļ•āļĢāļĩāļĒāļĄāđ„āļ”āđ‰āļĄāļĩāļ‚āļ™āļēāļ”āļ­āļĒāļđāđˆāđƒāļ™āļŠāđˆāļ§āļ‡ 195.14 Âą 9.11 āļ–āļķāļ‡ 256.80 Âą 72.06 āļ™āļēāđ‚āļ™āđ€āļĄāļ•āļĢ āļ„āđˆāļēāļ”āļąāļŠāļ™āļĩāļāļēāļĢāļāļĢāļ°āļˆāļēāļĒāļ‚āļ™āļēāļ”āļ—āļĩāđˆāđāļ„āļšāļĄāļēāļāļ­āļĒāļđāđˆāđƒāļ™āļŠāđˆāļ§āļ‡ 0.064 Âą 0.024 āļ–āļķāļ‡ 0.092 Âą 0.049 āđāļĨāļ°āļ„āđˆāļēāļĻāļąāļāļĒāđŒāđ„āļŸāļŸāđ‰āļēāļšāļ™āļœāļīāļ§āļ­āļ™āļļāļ āļēāļ„āļ­āļĒāļđāđˆāđƒāļ™āļŠāđˆāļ§āļ‡ -8.10 Âą 0.30 āļ–āļķāļ‡ -9.73 Âą 0.63 āļĄāļīāļĨāļĨāļīāđ‚āļ§āļĨāļ•āđŒ āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđāļĨāļ°āļ›āļĢāļīāļĄāļēāļ“āļāļēāļĢāļāļąāļāđ€āļāđ‡āļšāļĒāļēāļ­āļĒāļđāđˆāđƒāļ™āļŠāđˆāļ§āļ‡āļĢāđ‰āļ­āļĒāļĨāļ° 17.40 Âą 8.23 āļ–āļķāļ‡ 28.59 Âą 3.52 āđāļĨāļ°āļĢāđ‰āļ­āļĒāļĨāļ° 1.77 Âą 0.59 āļ–āļķāļ‡ 2.46 Âą 0.35 āļ•āļēāļĄāļĨāļģāļ”āļąāļš āļ§āļīāļ˜āļĩāļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™āđƒāļ™āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™ 3 āļ§āļīāļ˜āļĩāđ„āļĄāđˆāļĄāļĩāļœāļĨāļ•āđˆāļ­āļ„āļļāļ“āļĨāļąāļāļĐāļ“āļ°āļ—āļēāļ‡āđ€āļ„āļĄāļĩāļŸāļīāļŠāļīāļāļŠāđŒ āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđāļĨāļ°āļ›āļĢāļīāļĄāļēāļ“āļāļēāļĢāļāļąāļāđ€āļāđ‡āļšāļĒāļē āļŠāļĢāļļāļ›: āļŠāļēāļĄāļēāļĢāļ–āđ€āļ•āļĢāļĩāļĒāļĄāļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™āļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™āļ—āļĩāđˆāļĄāļĩāļ„āļļāļ“āļŠāļĄāļšāļąāļ•āļīāļ•āļēāļĄāļ•āđ‰āļ­āļ‡āļāļēāļĢ āđ‚āļ”āļĒāđ„āļĄāđˆāđƒāļŠāđ‰āļāļĨāļđāļ•āļēāļĢāđŒāļ­āļąāļĨāļ”āļĩāļŪāļąāļĒāļ”āđŒ  āđāļĨāļ°āļ§āļīāļ˜āļĩāļāļēāļĢāļšāļĢāļĢāļˆāļļāđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™ 3 āļ§āļīāļ˜āļĩāđ„āļĄāđˆāļĄāļĩāļœāļĨāļ•āđˆāļ­āļ„āļļāļ“āļĨāļąāļāļĐāļ“āļ°āļ—āļēāļ‡āđ€āļ„āļĄāļĩāļŸāļīāļŠāļīāļāļŠāđŒ āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđāļĨāļ°āļ›āļĢāļīāļĄāļēāļ“āļāļēāļĢāļāļąāļāđ€āļāđ‡āļšāļĒāļē āļ„āļģāļŠāļģāļ„āļąāļ: āđ€āļ„āļ­āļĢāđŒāļ„āļīāļ§āļĄāļīāļ™; āļ­āļ™āļļāļ āļēāļ„āļ™āļēāđ‚āļ™; āļ§āļīāļ˜āļĩāļ”āļĩāđ‚āļ‹āļĨāđ€āļ§āļŠāļąāđˆāļ™; āđ‚āļšāđ„āļ§āļ™āđŒāļ‹āļĩāļĢāļąāđˆāļĄāļ­āļąāļĨāļšāļđāļĄāļīāļ™ Abstract Objective: To explore various preparation by desolvation methods of curcumin-loaded bovine serum albumin nanoparticles (CUR-BSA-NPs) to obtain desired physicochemical properties and drug loading. Method: CUR-BSA-NPs were prepared by desolvation method without using glutaraldehyde as cross-linking agent. The influences of bovine serum albumin (BSA) concentration and water to ethanol volume ratio on size, size distribution, and particle surface charge were examined. The effects of 3 different loading methods of CUR into CUR-BSA-NPs on entrapment efficiency and loading capacity were also investigated. Results: The increase in BSA concentration and amount of water in water-ethanol mixture resulted in larger BSA-NPs with less negative surface charge. The optimum conditions from the screening results using 20 mg/mL BSA concentration and 1:6 water to ethanol volume ratio were chosen for preparation of CUR-BSA-NPs with 3 different loading methods. The sizes of CUR-BSA-NPs ranged from 195.14 Âą 9.11 to 256.80 Âą 72.06 nm and polydispersity indices of extremely narrow size distribution ranged from 0.064 Âą 0.024 to 0.092 Âą 0.049. The zeta potentials were in the range from -8.10 Âą 0.30 to -9.73 Âą 0.63 mV. The entrapment efficiency and loading capacity were in the range from 17.40 Âą 8.23 to 28.59 Âą 3.52 % and 1.77 Âą 0.59 to 2.46 Âą 0.35 %, respectively. The 3 different CUR loading methods into CUR-BSA-NPs were found to impose no significant effects on physicochemical characteristics, entrapment efficiency, and loading capacity. Conclusion: The CUR-BSA-NPs with desired properties could be developed by desolvation method without using glutaraldehyde. The 3 different loading methods of CUR into CUR-BSA-NPs had no significant effects on physicochemical characteristics, entrapment efficiency, and loading capacity of CUR-BSA-NPs. Keywords: curcumin; nanoparticles; desolvation method; bovine serum albumi

    Development of curcumin liposome formulations using polyol dilution method

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    This study was aimed to formulate curcumin liposomes (CLs) by using polyol dilution method which is advantageous for no residue of organic solvent. CLs were the mixture of hydrogenated phosphatidylcholine (PC) and cholesterol (CH) at the molar ratio of 9:1. Propylene glycol (PG), glycerin, and polyethylene glycol 400 (PEG-400) were used as polyol solvent. Extrusion was applied after the suspension formed. The amount of polyol and curcumin and preparing temperature were investigated. The obtained suspensions were observed for appearance, size, size distribution, zeta potential, morphology, and percentage of entrapment. The results showed that type and amount of polyol had an impact on both liposomal size and the amount of entrapped curcumin, while preparing temperature was also an important factor. However, the solubility of lipids and drug in a given polyol should be considered because of loading efficiency in the formulation

    Novel concept of exosome-like liposomes for the treatment of Alzheimer's disease

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    Exosomes are cell-derived vesicles that act as carriers for proteins and nucleic acids, with therapeutic potential and high biocompatibility. We propose a new concept of exosome-like liposomes for controlled delivery. The goal of this work was to develop a new type of liposomes with a unique mixture of phospholipids, similar to naturally occurring exosomes but overcoming their limitations of heterogeneity and low productivity, for therapeutic delivery of bioactive compounds. Curcumin was chosen as model compound, as it is a phytochemical molecule known to have antioxidant and anti-inflammatory properties, which can protect the brain against oxidative stress and reduce Îē-amyloid accumulation, major hallmarks of Alzheimer's disease (AD). These new liposomes can efficiently encapsulate hydrophobic curcumin, yielding particles with a size smaller than 200 nm, and a polydispersity index lower than 0.20, which make them ideal for crossing the blood-brain barrier. These particles have a long shelf life, being stable up to 6 months. The curcumin encapsulation efficiency was higher than 85% (up to approximately 94%). Curcumin-loaded liposomes were not cytotoxic (up to 20 ΞM curcumin, and 200 ΞM of exo-liposomes), and significantly reduced oxidative stress induced in SH-SY5Y neuronal cells, indicating their potential for neuroprotection. They also do not show any toxicity and are internalized in zebrafish embryos, concentrating in lipid enriched areas, as the brain and the yolk sac. Such innovative carriers are a new effective approach to deliver drugs into the brain, as these are stable, protect the cargo and are uptaken by neuronal cells. Upon internalization, liposomes release the therapeutic biomolecules, resulting in successful neuroprotection, being a positive alternative strategy for AD therapy.Strategic Programme UID/BIA/04050/2020 funded by National funds through the FundaçÃĢo para a CiÊncia e Tecnologia I.P., and the project “FUN2CYT: Harnessing the Potential for Biomedical Applications of Pleiotropic Cytokines LIF and Oncostatin M” (POCI-01-0145-FEDER-030568), supported by Programa Operacional Competitividade e InternacionalizaçÃĢo (FEDER) and FCT, IP. MÃĄrio Fernandes (SFRH/BD/147819/2019) and ClÃĄudia Botelho (SFRH/BPD/111291/2015) hold scholarships from FundaçÃĢo para a CiÊncia e Tecnologia, and Ivo Lopes is a recipient of a scholarship from the DireçÃĢo Regional da CiÊncia e Tecnologia, Governo Regional dos Açores (M3.1.a/F/128/2015).info:eu-repo/semantics/publishedVersio
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