A team of scientists from the Perelman School of Medicine at the University of Pennsylvania and Aum Biotech LLC have described the development of a novel cancer immunotherapy designed to target FOXP3-positive T regulatory cells (Tregs) with a next generation of antisense oligonucleotides (ASOs), termed FOXP3 Aumsilence ASO. In contrast to previous ASOs, FOXP3 Aumsilence ASOs do not require delivery agents, and are capable of highly specific RNA silencing of previously undruggable targets.