• Tian Zhu, Yiman Wang, Hongzhong Jin, and Li Li.
• a Department of Dermatology , Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences , Beijing , China.
• Ann. Med. 2019 Mar 1; 51 (2): 101-108.

AbstractExosomes have generated significant interest in the last few decades owing to their important roles in a diverse range of biological pathways. They are nano-sized lipid bilayer membrane vesicles of endosomal origin, and are produced by a vast number of cell types. They are released into the extracellular environment and are found in most biological fluids. Exosomes can contain proteins, lipids and nucleic acids. The cargo of exosomes allows them to play roles in cell communication, antigen presentation, as biomarkers and in immune regulation. Substantial efforts have been made to understand their biology and potential clinical use in various diseases, including autoimmune connective tissue diseases (ACTD). In this review, we highlight the known functions of exosomes and detail recent advances made in the elucidation of the roles of exosomes in ACTDs with an emphasis on their potential use as a biomarker for disease diagnosis and as a therapeutic target. Key messages Exosome with the function of cell communication, antigen presentation, biomarkers, immune responses and immune regulation have become a hot area and have played an important role in several areas of science and technology especially in medicine. Exosomes play important roles in numerous biological processes as well as in the pathogenesis of ACTDs. Exosome comes into being the non-invasive procedure as potential biomarkers and excellent treatment means in ACTDs.

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