Abstract
Exosomes are extracellular vesicles naturally released from cells. Exosomes from different sources play different roles in cellular component exchange, signal transduction, and pathological development. Exosomes have distinct biological characteristics such as low immunogenicity, easy uptake by cells, crossing the blood-brain barrier, natural targeting, and easy modification. Many studies show that exosomes as drug carriers have a great application prospect in cancer therapy. In this review, we review the biogenesis, origin, biological characteristics of exosomes, and the exosome drug delivery system and its application for cancer therapy are summarized to provide a reference for the study of exosomes.
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