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Many human diseases carry at least two independent gene mutations, further exacerbating clinical disorders. In this work, disulfide bond-conjugated dual PEGylated siRNAs were synthesized, capable of specifically targeting and silencing two genes simultaneously. To achieve efficient delivery, the conjugated siRNAs were formulated with the cationic chitosan together with an anionic polymer, poly(γ-glutamic...
Although advantageous for siRNA packing and protection, chitosan (CS)-based complexes may lead to difficulties in siRNA release once they arrive at the site of action, due to their electrostatic interactions. To assist the intracellular release of siRNA and thus enhance its effectiveness in gene silencing, we incorporated a negatively charged poly(γ-glutamic acid) (γ-PGA) into CS/siRNA complexes....
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