Pure DNA scaffolded drug delivery systems for cancer therapy

The development of effective drug delivery system is highly important for targeted tumor therapy. Over the past few decades, a number of biomaterials have been extensively explored as potential drug loading vehicles. Among them, DNA has emerged as a highly promising scaffold to construct drug delivery systems, owing to its excellent biocompatibility, precise programmability, multifunctionalities, structural predictability, and versatile modifications for improved biostability. Herein, the drug delivery systems that purely comprise of DNA are reviewed. Drugs can be incorporated into DNA via distinct mechanisms, and various DNA architectures have been developed to load different types of anti-tumor therapeutics. For therapeutic applications, we focus on their intracellular delivery and drug release, and DNA-based platforms with different cellular uptake pathways and stimuliresponsive drug release profiles are discussed. Finally, there search opportunities of the field are speculated to pave the way for future research direction.

Automated summary

This article reviews drug delivery systems that purely consist of DNA and discusses their applications in targeted tumor therapy. Drugs can be incorporated into DNA via distinct mechanisms, and various DNA architectures have been developed for different types of anti-tumor therapeutics. The focus is on their intracellular delivery and drug release, with discussions on DNA-based platforms with different cellular uptake pathways and stimuliresponsive drug release profiles. Research opportunities in the field are speculated to pave the way for future research direction.