Safe and efficient gene delivery based on rice bran polysaccharide

Area of Science:

• Biomaterials Science
• Gene Therapy
• Polymer Chemistry

Background:

• Polysaccharides can be modified by polycations for gene delivery applications.
• Rice bran polysaccharides (RBP) are a potential source for biomaterials.

Purpose of the Study:

• To develop and evaluate polyethyleneimine (PEI) modified rice bran polysaccharide (PRBP) as a gene vector.
• To assess the physicochemical properties, DNA complexation, and transfection efficiency of PRBP in vitro.

Main Methods:

• Extraction and purification of polysaccharides from rice bran.
• Preparation of PRBP by grafting RBP with low molecular weight PEI, characterized by FTIR.
• In vitro evaluation of PRBP/DNA polylexes for DNA compaction, protection against DNase I, gene transfection efficiency, and cytotoxicity (MTT assay).

Main Results:

• PRBP effectively compacted DNA into polylexes (50-100 nm) and protected DNA from degradation.
• PRBP demonstrated significantly higher gene transfection efficiency compared to PEI, reaching 37.5% at a weight ratio of 3 (PRBP-2000).
• PRBP exhibited substantially lower cytotoxicity than PEI, particularly PEI2000.

Conclusions:

• PRBP is a promising biomaterial for safe and efficient gene delivery.
• Modified rice bran polysaccharides offer a new strategy for developing advanced gene vectors.
• PRBP presents a viable alternative to existing gene delivery systems with improved safety and efficacy profiles.