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Updated: Mar 21, 2026
Porous Silicon Microparticles for Delivery of siRNA Therapeutics
Published on: January 15, 2015
Synthesis and characterization of Fe3O4-PEG-LAC-chitosan-PEI nanoparticle as a survivin siRNA delivery system
S Arami1,2, M R Rashidi2,3, M Mahdavi4
11 Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
Abstract:
The limited effectiveness of the conventional methods for cancer treatment makes the researchers to find novel safe and effective therapeutic strategies. One of these strategies is to use small interfering RNAs (siRNAs). A major challenge here is the siRNA delivery into the cells. The purpose of this study was to design and prepare a biocompatible, biodegradable, and safe nanosized particle for siRNA delivery into human breast cancer MCF-7 and leukemia K562 cells. Chemically synthesized magnetic nanoparticles containing polyethyleneglycol-lactate polymer (PEG-LAC), chitosan, and polyethyleneimine (PEI) were successfully prepared and used as a gene delivery vehicle. The nanoparticles were characterized by Fourier transform infrared spectroscopy and zeta potential. The Fe3O4-PEG-LAC-chitosan-PEI nanoparticle showed efficient and stable survivin siRNA loading in gel retardation assay. The cytotoxicity of the prepared nanoparticle was studied using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide assay and was compared with that of mitoxantrone (MTX) in combination with the prepared siRNA delivery system to evaluate the possible synergic effect of MTX and survivin siRNA. The nanoparticles with and without noncomplementary siRNA showed low toxicity against both cell lines; however, a twofold decrease was observed in cell survival percent after MTX addition to MCF-7 cells treated with either nanoparticle itself or complexed with noncomplementary siRNA. While survivin siRNA nanoplex caused threefold decrease in the cell survival percent, its combination with MTX did not result in a significant increase in the cytotoxic effect. Therefore, Fe3O4-PEG-LAC-chitosan-PEI nanoparticle should be considered as a potential carrier for enhanced survivin siRNA delivery into MCF-7 and K562 cells.
Insights
Researchers developed a novel nanoparticle for delivering small interfering RNAs (siRNAs) into cancer cells. This biocompatible carrier shows promise for improving cancer therapy by effectively delivering survivin siRNA to breast cancer and leukemia cells.
Area of Science:
- Biotechnology
- Nanomedicine
- Cancer Therapy
Background:
- Conventional cancer treatments have limited effectiveness, necessitating novel therapeutic strategies.
- Small interfering RNAs (siRNAs) offer a promising therapeutic avenue, but efficient cellular delivery remains a significant challenge.
- Developing safe and effective delivery systems is crucial for advancing siRNA-based cancer therapies.
Purpose of the Study:
- To design and synthesize a biocompatible, biodegradable, and safe nanosized particle for siRNA delivery.
- To evaluate the potential of the developed nanoparticle as a gene delivery vehicle for human breast cancer (MCF-7) and leukemia (K562) cells.
- To assess the cytotoxicity and potential synergistic effects of the nanoparticle-siRNA complex with mitoxantrone.
Main Methods:
- Chemically synthesized magnetic nanoparticles (Fe3O4) were formulated with polyethyleneglycol-lactate (PEG-LAC), chitosan, and polyethyleneimine (PEI).
- Nanoparticle characterization involved Fourier transform infrared spectroscopy and zeta potential measurements.
- Survivin siRNA loading efficiency was determined by gel retardation assay, and cytotoxicity was assessed using MTT assay.
Main Results:
- The Fe3O4-PEG-LAC-chitosan-PEI nanoparticle demonstrated efficient and stable loading of survivin siRNA.
- The nanoparticles exhibited low intrinsic toxicity to both MCF-7 and K562 cell lines.
- While survivin siRNA nanoplex alone reduced cell survival, its combination with mitoxantrone did not yield significant synergistic cytotoxic effects.
Conclusions:
- The Fe3O4-PEG-LAC-chitosan-PEI nanoparticle is a promising carrier for enhanced survivin siRNA delivery.
- The developed nanocarrier shows potential for improving the efficacy of siRNA-based cancer treatments.
- Further research is warranted to explore the therapeutic applications of this nanoparticle in cancer therapy.
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