Chitosan-Thiamine Pyrophosphate as a Novel Carrier for siRNA Delivery
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A novel siRNA carrier was formulated between chitosan (CS) and thiamine pyrophosphate (TPP). Their ability to deliver siRNA were evaluated in stable and constitutive EGFP-expressing HepG2 cells.
CS-TPP was prepared by dissolving CS in TPP solution at a CS:TPP molar ratio of 1.5:1. Complexes of CS-TPP/siRNA were formed at varying weight ratios and characterized using gel electrophoresis. Their morphologies and particle sizes were evaluated, and the transfection efficiency and cytotoxicity of CS-TPP/siRNA complexes were examined in stable and constitutive EGFP-expressing HepG2 cells.
Gel electrophoresis results indicated that binding of CS-TPP and siRNA depended on the molecular weight (MW) and weight ratio of CS, and the particle sizes of CS-TPP/siRNA complexes were in nano-size. The CS-TPP-mediated siRNA silencing of the endogenous EGFP gene occurred maximally with 70–73% efficiency. The CS-TPP/siRNA complex with the lowest MW of CS (20 kDa) at a weight ratio of 80 showed the strongest inhibition of gene expression, which was higher than Lipofectamine 2000™. Over 90% the average cell viabilities of the complexes were observed by MTT assay.
This study suggests that CS-TPP is straightforward to prepare, safe and exhibits significantly improved siRNA delivery potential in vitro.
- Chitosan-Thiamine Pyrophosphate as a Novel Carrier for siRNA Delivery
Volume 25, Issue 12 , pp 2807-2814
- Cover Date
- Print ISSN
- Online ISSN
- Springer US
- Additional Links
- chitosan salts
- siRNA delivery
- thiamine pyrophosphate
- Industry Sectors
- Author Affiliations
- 1. Faculty of Pharmacy, Silpakorn University, Nakhonpathom, 73000, Thailand
- 2. National Nanotechnology Center, Thailand Science Park, Pathumthani, Thailand