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What are exocrine stem cells?
Exosomes are tiny vesicles with a diameter of 40- 100nm, which can transport biomolecules such as lipids, sugars, protein, mRNA, miRNA and DNA from one cell to another, and then exchange genetic materials, reprogram the host cells and conduct intercellular communication. The specific advantages of foreign body therapy include: lower antigenicity than cells, stable and easy preservation of contents, adjustment of foreign body function according to changing the natural environment of cells, and convenience for large-scale production.

Therefore, many scholars have clearly pointed out that stem cells can cure various diseases, and the key reason is that stem cells can metabolize various cytokines to give full play to hormone regulation, eliminate inflammation and repair damage.

Studies have shown that exosomes from different arrangements not only have their nonspecific protein molecular structures, but also include the main molecular structures that perform their functions. In other words, stem cell exosomes have some characteristics of stem cells, such as homing ability of fixed metastasis and low antigenicity. Studies have shown that foreign bodies derived from stem cells can transport bioactive chemicals such as mRNA, microRNA and protein reasonably, and have key molecular biological functions such as reducing apoptosis, relieving inflammation, promoting capillary transformation, inhibiting liver fibrosis, and enhancing the development potential of mechanism repair, which has a good clinical application prospect in the reconstruction of control mechanism.

Stem cell exosome is a cell component derived from stem cells. It carries some bioactive chemicals such as stem cell protein, mRNA and microRNA, and has some functions of stem cells. In addition, foreign bodies conform to the definition of nanoparticles. Stem cell exosomes can penetrate the blood-brain barrier, which is the key substance to transmit information between stem cells and other cells, and is conducive to the completion of stem cell functions. Studies have shown that most or all of the positive results of mesenchymal stem cells used to treat diseases caused by nervous system are attributed to exosomes of mesenchymal stem cells.