Abstract
A target specific systemic delivery system of siRNA therapeutics was successfully developed using reducible polyethyleneimine grafted hyaluronic acid [(PEI-SS)-g-HA] conjugates. The PEI-SS was synthesized by Michael addition of low molecular weight PEI (MW = 2000) with cystaminebisacrylamide (CBA), and grafted to carboxyl groups of HA via amide bond formation after activation with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and 1-hydroxybenzotriazole monohydrate (HOBt). The confocal microscopic and fluorometric analyses confirmed the effective cellular uptake of siRNA/(PEI-SS)-g-HA complex by HA receptor mediated endocytosis. In vitro gene silencing efficiency was ca. 80% in the presence of 10 vol% serum and ca. 50% in the presence of 50 vol% serum in B16F1 melanoma cells and activated hepatic stellate cells (HSCs). Furthermore, target specific systemic delivery of apolipoprotein B (ApoB) siRNA/(PEI-SS)-g-HA complex resulted in a drastically reduced ApoB mRNA level down to ca. 20% in a dose-dependent manner. Finally, TGF-β siRNA/(PEI-SS)-g-HA complex showed a feasible therapeutic effect on liver cirrhosis with a significantly reduced nodule formation, collagen content, and HSC number. The siRNA/(PEI-SS)-g-HA complex can be exploited for the target specific systemic treatment of various liver diseases.
| Original language | English |
|---|---|
| Pages (from-to) | 4951-4958 |
| Number of pages | 8 |
| Journal | Biomaterials |
| Volume | 32 |
| Issue number | 21 |
| DOIs | |
| State | Published - Jul 2011 |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2009-0072986 ). This research was supported by the R&D Program of MKE/KEIT ( 10035159 ). This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2009-0081871 ).
Keywords
- Hyaluronic acid
- Liver cirrhosis
- Polyethyleneimine
- SiRNA
- Targeted systemic delivery
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