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Factors influencing the transfection efficiency of ultra low molecular weight chitosan/hyaluronic acid nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
10403 683 2009 7 PDF Available
Title
Factors influencing the transfection efficiency of ultra low molecular weight chitosan/hyaluronic acid nanoparticles
Abstract

The present work describes nanoparticles made of ultra low molecular weight chitosan (ULMWCh)/hyaluronic acid (HA) as novel potential carriers for gene delivery. Small and monodispersed nanoparticles with high in vitro transfection capabilities have been obtained by the complexation of these two polyelectrolytes. ULMWCh (<10 kDa) presents more advantageous characteristics over the higher molecular weight chitosan for clinical applications, namely increased solubility at physiological pH and improved DNA release. The ULMWCh:HA ratio and the HA molecular weights were varied with the aim of obtaining particles in the 100 nm range. Using chitosan (Ch) with a molecular weight of 5 kDa, HA with a molecular weight of 64 kDa, and a weight ratio of 4:1, nanoparticles with a Z-average size of 146 ± 1 nm and narrow size distribution (polydispersity index: 0.073 ± 0.030) were obtained. Nanoparticle images taken in dry conditions by SEM and AFM showed spherical particles. The optimal pH for transfection ranged from 6.4 to 6.8 for 0.25 μg of EGFP plasmid per well, with an incubation time of 4 h. Using these optimized parameters, DNA/ULMWCh:HA nanoparticles successfully transfected 25 ± 1% of the 293T cells with pEGFP, compared to 0.7% obtained for DNA/ULMWCh under the same conditions. This high transfection efficiency of our non-viral gene delivery system could be attributed to the synergic effect of ULMWCh and low charge density of the HA chain for easy release of DNA which makes the system suitable for targeted gene delivery.

Keywords
Ultra low molecular weight chitosan; Hyaluronic acid; Nanoparticles; Gene delivery; Non-viral vector; Nanocarrier
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Factors influencing the transfection efficiency of ultra low molecular weight chitosan/hyaluronic acid nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 30, Issue 13, May 2009, Pages 2625–2631
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us