1
|
Fornaguera C, Grijalvo S, Galán M, Fuentes-Paniagua E, de la Mata FJ, Gómez R, Eritja R, Calderó G, Solans C. Novel non-viral gene delivery systems composed of carbosilane dendron functionalized nanoparticles prepared from nano-emulsions as non-viral carriers for antisense oligonucleotides. Int J Pharm 2014; 478:113-123. [PMID: 25448573 DOI: 10.1016/j.ijpharm.2014.11.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 11/12/2014] [Accepted: 11/13/2014] [Indexed: 12/18/2022]
Abstract
The development of novel and efficient delivery systems is often the limiting step in fields such as antisense therapies. In this context, poly(d,l-lactide-co-glycolide) acid (PLGA) nanoparticles have been obtained by a versatile and simple technology based on nano-emulsion templating and low-energy emulsification methods, performed in mild conditions, providing good size control. O/W polymeric nano-emulsions were prepared by the phase inversion composition method at 25°C using the aqueous solution/polysorbate80/[4 wt% PLGA in ethyl acetate] system. Nano-emulsions formed at oil-to-surfactant (O/S) ratios between 10/90-90/10 and aqueous contents above 70 wt%. Nano-emulsion with 90 wt% of aqueous solution and O/S ratio of 70/30 was chosen for further studies, since they showed the appropriate characteristics to be used as nanoparticle template: hydrodynamic radii lower than 50 nm and enough kinetic stability. Nanoparticles, prepared from nano-emulsions by solvent evaporation, showed spherical shape, sizes about 40 nm, negative surface charges and high stability. The as-prepared nanoparticles were functionalized with carbosilane cationic dendrons through a carbodiimide-mediated reaction achieving positively charged surfaces. Antisense oligonucleotides were electrostatically attached to nanoparticles surface to perform gene-silencing studies. These complexes were non-haemolytic and non-cytotoxic at the concentrations required. The ability of the complexes to impart cellular uptake was also promising. Therefore, these novel nanoparticulate complexes might be considered as potential non-viral carriers in antisense therapy.
Collapse
Affiliation(s)
- Cristina Fornaguera
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, 08034, Barcelona, Spain; CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Santiago Grijalvo
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, 08034, Barcelona, Spain; CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Marta Galán
- CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain; Group of Dendrimers for Biomedical Applications, University of Alcalá (GDAB-UAH), Alcalá de Henares, Madrid, Spain
| | - Elena Fuentes-Paniagua
- CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain; Group of Dendrimers for Biomedical Applications, University of Alcalá (GDAB-UAH), Alcalá de Henares, Madrid, Spain
| | - Francisco Javier de la Mata
- CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain; Group of Dendrimers for Biomedical Applications, University of Alcalá (GDAB-UAH), Alcalá de Henares, Madrid, Spain
| | - Rafael Gómez
- CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain; Group of Dendrimers for Biomedical Applications, University of Alcalá (GDAB-UAH), Alcalá de Henares, Madrid, Spain
| | - Ramon Eritja
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, 08034, Barcelona, Spain; CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Gabriela Calderó
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, 08034, Barcelona, Spain; CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Conxita Solans
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona, 18-26, 08034, Barcelona, Spain; CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain.
| |
Collapse
|