Journal
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
Volume 33, Issue 11, Pages 851-858Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201600123
Keywords
-
Funding
- Fundacao para a Ciencia e a Tecnologia (FC&T, Lisbon), Projecto de Re-equipamento Cientifico, Portugal
- Associate Laboratory Research Unit for Green Chemistry, Technologies and Clean Processes-LAQV - national funds from FCT [UID/QUI/50006/2013]
- European Regional Development Fund (ERDF) under the PT2020 Partnership Agreement [POCI-01-0145-FEDER-007265]
- FCT [PTDC/EQU-EQU/116097/2009, SFRH/BD/6688/2009, SFRH/BD/51584/2011, SFRH/BD/109006/2015, IF/00915/2014]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/51584/2011, PTDC/EQU-EQU/116097/2009, SFRH/BD/109006/2015] Funding Source: FCT
Ask authors/readers for more resources
Pulmonary administration offers excellent advantages over conventional drug delivery routes, including increasing therapeutics bioavailability, and avoiding long-term safety issues. Formulations of nano-in-micro dry powders for lung delivery are engineered using (S)-ibuprofen as a model drug. These biodegradable formulations comprise nanoparticles of drug-loaded POxylated polyurea dendrimers coated with chitosan using supercritical-fluid-assisted spray drying. The formulations are characterized in terms of morphology, particle-size distribution, in vitro aerodynamic particle pulmonary distribution, and glutathione-S-transferase assay. It is demonstrated that ibuprofen-loaded nanoparticles can be successfully incorporated into microspheres with adequate aerodynamic properties, mass median aerodynamic diameter (1.86-3.83 mu m), and fine particle fraction (28%-45%), for deposition into the deep lung. The (S)-ibuprofen dry powder formulations show enhanced solubility, high swelling behavior and a sustained drug release at physiologic pH. Also, POxylated polyureas decrease the (S)-ibuprofen toxic effect on cancer cellular growth. The 3-(4,5-dimethylthiazol-2-yl)-5-(3- carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assays show no significant cytotoxicity on the metabolic activity of human lung adenocarcinoma ephithelial (A549) cell line for the lowest concentration (1 x 10(-3) M), even for longer periods of contact with the cells (up to 120 h), and in the normal human dermal fibroblasts cell line the toxic effect is also reduced.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available