Open AccessComparative assessment of poly (D,L-lactide-co-glycolide) nanoparticles modified by either cetyltrimethylammonium bromide or chitosan for plasmid DNA adsorption
Author(s) -
Abd Almonem Doolaanea,
Nur Izzati Mansor,
Nurul Hafizah Mohd Nor,
Mohd Affendi Mohd Shafri,
Susi Sukmasari,
Farahidah Mohamed
Publication year - 2017
Publication title -
tropical journal of pharmaceutical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.209
H-Index - 36
eISSN - 1596-5996
pISSN - 1596-9827
DOI - 10.4314/tjpr.v16i10.2
Subject(s) - chitosan , plga , zeta potential , nuclear chemistry , chemistry , cytotoxicity , transfection , ammonium bromide , nanoparticle , adsorption , bromide , fourier transform infrared spectroscopy , chemical engineering , organic chemistry , pulmonary surfactant , materials science , nanotechnology , biochemistry , in vitro , engineering , gene
Purpose: To evaluate poly (D,L-lactide-co-glycolide) PLGA nanoparticles modified by cetyltrimethyl ammonium bromide (CTAB) or chitosan for plasmid DNA adsorption.Methods: PLGA nanoparticles were prepared by solvent diffusion method and modified by including CTAB in the aqueous (F1) or oil phase (F2), or by including low (F3) or medium (F4) molecular weight chitosan. The nanoparticles were characterised by differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR), as well as for cell toxicity, cell uptake and transfection.Results: CTAB failed to confer positive charge on the nanoparticles. CTAB desorbed easily from F1 surface. This resulted in negative zeta potential, increased cytotoxicity as well as decreased cell uptake and transfection. In F2, CTAB was located mainly in PLGA matrix, resulting in negative charge with decreased cytotoxicity, and increased cell uptake and transfection compared to F1. On the other hand, chitosan-modified nanoparticles (F3 and F4) showed stronger interaction between chitosan and PLGA, leading to positively-charged particles, decreased cytotoxicity, as well as increased cell uptake and transfection. Amongst the four formulations, F4 exhibited the highest transfection.Conclusion: These results should aid in understanding how PLGA nanoparticles are modified by CTAB and chitosan. Modification with chitosan yields PLGA nanoparticles with higher DNA adsorption and transfection with lower cytotoxicity.Keywords: Chitosan, cetyltrimethyl ammonium bromide (CTAB), Nanoparticle, Poly (D,L-lactide-coglycolide) PLGA, Plasmid DNA adsorption, Gene therapy