Nucleic acid delivery with chitosan hydroxybenzotriazole

Area of Science:

• Biomaterials Science
• Gene Therapy
• Nanotechnology

Background:

• Effective nucleic acid delivery is crucial for gene therapy and research.
• Chitosan-based materials are explored for their biocompatibility and biodegradability.
• Developing safe and efficient non-viral vectors remains a key challenge in gene delivery.

Purpose of the Study:

• To evaluate the transfection efficiency of chitosan hydroxybenzotriazole (CS-HOBT) for in vitro nucleic acid delivery.
• To characterize the complex formation and physicochemical properties of CS-HOBT/nucleic acid complexes.
• To assess the gene silencing efficacy and cytotoxicity of CS-HOBT-based vectors.

Main Methods:

• Agarose gel electrophoresis to confirm complex formation between CS-HOBT and DNA/siRNA.
• Dynamic light scattering to determine the particle size of CS-HOBT/nucleic acid complexes.
• MTT assay to evaluate the cytotoxicity of the developed complexes.
• Gene silencing assay using enhanced green fluorescent protein (EGFP) reporter gene.

Main Results:

• CS-HOBT successfully condensed DNA and siRNA into nanosized complexes.
• Complex formation was dependent on CS-HOBT molecular weight and weight ratio.
• Optimal transfection efficiency for DNA was observed with low CS MW (20 kDa) at a weight ratio of 2.
• Maximal gene silencing of 60% was achieved with CS-HOBT/siRNA complexes (20 kDa CS MW, ratio 80).
• CS-HOBT complexes exhibited low cytotoxicity, with over 80% cell viability.

Conclusions:

• CS-HOBT is a promising, safe, and easily synthesized non-viral vector for in vitro nucleic acid delivery.
• The CS-HOBT/nucleic acid complexes demonstrate potential for efficient gene delivery and silencing.
• Further research into CS-HOBT for in vivo applications is warranted based on these findings.