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Calderó G, Leitner S, García-Celma M, Solans C. Modulating size and surface charge of ethylcellulose nanoparticles through the use of cationic nano-emulsion templates. Carbohydr Polym 2019; 225:115201. [DOI: 10.1016/j.carbpol.2019.115201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 08/01/2019] [Accepted: 08/12/2019] [Indexed: 01/25/2023]
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Leitner S, Grijalvo S, Solans C, Eritja R, García-Celma MJ, Calderó G. Ethylcellulose nanoparticles as a new "in vitro" transfection tool for antisense oligonucleotide delivery. Carbohydr Polym 2019; 229:115451. [PMID: 31826509 DOI: 10.1016/j.carbpol.2019.115451] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/02/2019] [Accepted: 10/04/2019] [Indexed: 02/06/2023]
Abstract
Oil-in-water nano-emulsions have been obtained in the HEPES 20 mM buffer solution / [Alkylamidoammonium:Kolliphor EL = 1:1] / [6 wt% ethylcellulose in ethyl acetate] system over a wide oil-to-surfactant range and above 35 wt% aqueous component at 25 °C. The nano-emulsion with an oil-to-surfactant ratio of 70/30 and 95 wt% aqueous component was used for nanoparticles preparation. These nanoparticles (mean diameter around 90 nm and zeta potential of +22 mV) were non-toxic to HeLa cells up to a concentration of 3 mM of cationic species. Successful complexation with an antisense phosphorothioate oligonucleotide targeting Renilla luciferase mRNA was achieved at cationic/anionic charge ratios above 16, as confirmed by zeta potential measurements and an electrophoretic mobility shift assay, provided that no Fetal Bovine Serum is present in the cell culture medium. Importantly, Renilla luciferase gene inhibition shows an optimum efficiency (40%) for the cationic/anionic ratio 28, which makes these complexes promising for "in vitro" cell transfection.
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Affiliation(s)
- S Leitner
- Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain
| | - S Grijalvo
- Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain
| | - C Solans
- Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain
| | - R Eritja
- Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain
| | - M J García-Celma
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain; Departament de Farmàcia i Tecnologia Farmacèutica i Fisicoquímica, Univ. de Barcelona, IN2UB, Unitat Associada d'I+D al CSIC, Av Joan XXIII, s/n, 08028 Barcelona, Spain
| | - G Calderó
- Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain.
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Leitner S, Solans C, García-Celma M, Calderó G. Low-energy nano-emulsification approach as a simple strategy to prepare positively charged ethylcellulose nanoparticles. Carbohydr Polym 2019; 205:117-124. [DOI: 10.1016/j.carbpol.2018.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/19/2018] [Accepted: 10/09/2018] [Indexed: 10/28/2022]
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Calderó G, Fornaguera C, Zadoina L, Dols-Perez A, Solans C. Design of parenteral MNP-loaded PLGA nanoparticles by a low-energy emulsification approach as theragnostic platforms for intravenous or intratumoral administration. Colloids Surf B Biointerfaces 2017; 160:535-542. [PMID: 29024918 DOI: 10.1016/j.colsurfb.2017.09.060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/05/2017] [Accepted: 09/29/2017] [Indexed: 12/20/2022]
Abstract
Encapsulation of magnetic nanoparticles (MNP) into PLGA nanoparticles has been achieved by nano-emulsion templating using for the first time both, a low-energy emulsification method as well as biocompatible components accepted for pharmaceuticals intended for human use. The incorporation of MNP by nano-emulsion templating method proposed in this work has been investigated in two different systems applying mild process conditions and is shown to be simple and versatile, providing stable MNP-loaded PLGA nanoparticles with tunable size and MNP concentration. MNP-loaded PLGA nanoparticles showed sizes below 200nm by DLS and 50nm by TEM, and mean MNP loading per PLGA nanoparticle of 1 to 4, depending on the nanoparticle dispersion composition. Physical-chemical features suggest that the MNP-loaded PLGA nanoparticles obtained are good candidates for intravenous or intratumoral administration.
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Affiliation(s)
- G Calderó
- CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain; Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain.
| | - C Fornaguera
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - L Zadoina
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain
| | - A Dols-Perez
- CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain; Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain
| | - C Solans
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
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Calderó G, Montes R, Llinàs M, García-Celma M, Porras M, Solans C. Studies on the formation of polymeric nano-emulsions obtained via low-energy emulsification and their use as templates for drug delivery nanoparticle dispersions. Colloids Surf B Biointerfaces 2016; 145:922-931. [DOI: 10.1016/j.colsurfb.2016.06.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 05/31/2016] [Accepted: 06/08/2016] [Indexed: 10/21/2022]
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Fornaguera C, Feiner-Gracia N, Calderó G, García-Celma MJ, Solans C. PLGA nanoparticles from nano-emulsion templating as imaging agents: Versatile technology to obtain nanoparticles loaded with fluorescent dyes. Colloids Surf B Biointerfaces 2016; 147:201-209. [PMID: 27513588 DOI: 10.1016/j.colsurfb.2016.08.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 04/30/2016] [Accepted: 08/02/2016] [Indexed: 02/05/2023]
Abstract
The interest in polymeric nanoparticles as imaging systems for biomedical applications has increased notably in the last decades. In this work, PLGA nanoparticles, prepared from nano-emulsion templating, have been used to prepare novel fluorescent imaging agents. Two model fluorescent dyes were chosen and dissolved in the oil phase of the nano-emulsions together with PLGA. Nano-emulsions were prepared by the phase inversion composition (PIC) low-energy method. Fluorescent dye-loaded nanoparticles were obtained by solvent evaporation of nano-emulsion templates. PLGA nanoparticles loaded with the fluorescent dyes showed hydrodynamic radii lower than 40nm; markedly lower than those reported in previous studies. The small nanoparticle size was attributed to the nano-emulsification strategy used. PLGA nanoparticles showed negative surface charge and enough stability to be used for biomedical imaging purposes. Encapsulation efficiencies were higher than 99%, which was also attributed to the nano-emulsification approach as well as to the low solubility of the dyes in the aqueous component. Release kinetics of both fluorescent dyes from the nanoparticle dispersions was pH-independent and sustained. These results indicate that the dyes could remain encapsulated enough time to reach any organ and that the decrease of the pH produced during cell internalization by the endocytic route would not affect their release. Therefore, it can be assumed that these nanoparticles are appropriate as systemic imaging agents. In addition, in vitro toxicity tests showed that nanoparticles are non-cytotoxic. Consequently, it can be concluded that the preparation of PLGA nanoparticles from nano-emulsion templating represents a very versatile technology that enables obtaining biocompatible, biodegradable and safe imaging agents suitable for biomedical purposes.
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Affiliation(s)
- C Fornaguera
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.
| | - N Feiner-Gracia
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - G Calderó
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - M J García-Celma
- Department of Pharmacy and Pharmaceutic Technology, University of Barcelona, Av/Joan XXIII s/n, 08028, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - C Solans
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
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Fornaguera C, Feiner-Gracia N, Calderó G, García-Celma MJ, Solans C. Galantamine-loaded PLGA nanoparticles, from nano-emulsion templating, as novel advanced drug delivery systems to treat neurodegenerative diseases. Nanoscale 2015; 7:12076-12084. [PMID: 26118655 DOI: 10.1039/c5nr03474d] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Polymeric nanoparticles could be promising drug delivery systems to treat neurodegenerative diseases. Among the various methods of nanoparticle preparation, nano-emulsion templating was used in the present study to prepare galantamine-loaded nano-emulsions by a low-energy emulsification method followed by solvent evaporation to obtain galantamine-loaded polymeric nanoparticles. This approach was found to be suitable because biocompatible, biodegradable and safe nanoparticles with appropriate features (hydrodynamic radii around 20 nm, negative surface charge and stability higher than 3 months) for their intravenous administration were obtained. Encapsulation efficiencies higher than 90 wt% were obtained with a sustained drug release profile as compared to that from aqueous and micellar solutions. The enzymatic activity of the drug was maintained at 80% after its encapsulation into nanoparticles that were non-cytotoxic at the required therapeutic concentration. Therefore, novel galantamine-loaded polymeric nanoparticles have been designed for the first time using the nano-emulsification approach and showed the appropriate features to become advanced drug delivery systems to treat neurodegenerative diseases.
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Affiliation(s)
- C Fornaguera
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Spain
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Fornaguera C, Dols-Perez A, Calderó G, García-Celma MJ, Camarasa J, Solans C. PLGA nanoparticles prepared by nano-emulsion templating using low-energy methods as efficient nanocarriers for drug delivery across the blood-brain barrier. J Control Release 2015; 211:134-43. [PMID: 26057857 DOI: 10.1016/j.jconrel.2015.06.002] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 12/11/2022]
Abstract
Neurodegenerative diseases have an increased prevalence and incidence nowadays, mainly due to aging of the population. In addition, current treatments lack efficacy, mostly due to the presence of the blood-brain barrier (BBB) that limits the penetration of the drugs to the central nervous system. Therefore, novel drug delivery systems are required. Polymeric nanoparticles have been reported to be appropriate for this purpose. Specifically, the use of poly-(lactic-co-glycolic acid) (PLGA) seems to be advantageous due to its biocompatibility and biodegradability that ensure safe therapies. In this work, a novel approximation to develop loperamide-loaded nanoparticles is presented: their preparation by nano-emulsion templating using a low-energy method (the phase inversion composition, PIC, method). This nano-emulsification approach is a simple and very versatile technology, which allows a precise size control and it can be performed at mild process conditions. Drug-loaded PLGA nanoparticles were obtained using safe components by solvent evaporation of template nano-emulsions. Characterization of PLGA nanoparticles was performed, together with the study of the BBB crossing. The in vivo results of measuring the analgesic effect using the hot-plate test evidenced that the designed PLGA loperamide-loaded nanoparticles are able to efficiently cross the BBB, with high crossing efficiencies when their surface is functionalized with an active targeting moiety (a monoclonal antibody against the transferrin receptor). These results, together with the nanoparticle characterization performed here are expected to provide sufficient evidences to end up to clinical trials in the near future.
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Affiliation(s)
- C Fornaguera
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26 Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.
| | - A Dols-Perez
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26 Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - G Calderó
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26 Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
| | - M J García-Celma
- CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain; Department of Pharmacy and Pharmaceutical Technology, University of Barcelona, Av/ Joan XXIII s/n, 08028 Barcelona, Spain
| | - J Camarasa
- Department of Pharmacology and Therapeutic Chemistry (Pharmacology Section), University of Barcelona, Av/ Joan XXIII s/n, 08028 Barcelona, Spain
| | - C Solans
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26 Barcelona, Spain; CIBER of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain
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Serrà A, Gómez E, Calderó G, Esquena J, Solans C, Vallés E. Conditions that bicontinuous microemulsions must fulfill to be used as template for electrodeposition of nanostructures. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.03.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Serrà A, Gómez E, Calderó G, Esquena J, Solans C, Vallés E. Microemulsions for obtaining nanostructures by means of electrodeposition method. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2012.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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