Figure 2.

Publication trends of exosomes and lipid nanoparticles applied to drug delivery. (A) Comparison of the trends in the number of publications related to exosomes and lipid nanoparticles. The number of publications has been estimated by combining drug-delivery-related search terms such as “drug delivery”, “pharmaceutic”, and “carrier” with the terms “lipid nanoparticle” vs “exosome” or “extracellular vesicle”. (B) Corresponding yearly percentages of publications related to exosomes (EX) and lipid nanoparticles (LNP) in journal articles (JRN) and patents (PAT) calculated for each specific year are compared.