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Endosomal Escape and Nuclear Localization: Critical Barriers for Antisense Therapeutics
Antisense oligonucleotides (ASOs) are promising for targeting diseases by modulating gene expression, even for genes previously considered "undruggable." ASOs enter cells through endocytosis but face challenges as they often get trapped in endosomes, limiting their therapeutic effect. Strategies to enhance endosomal escape, including using endosomal escape agents and non-viral delivery vehicles, are critical to increase their effectiveness. Despite some success, only 1-2% of ASOs reach the target mRNA in the …