PMC:7473478 / 7700-9046 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7473478","sourcedb":"PMC","sourceid":"7473478","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7473478","text":"MESENCHYMAL STEM CELLS (MSCs) AND MSC SECRETOME\nIt has currently become apparent that MSCs induce therapeutic characteristics by a paracrine pathway by releasing bioactive substances known as secretomes (25). MSC-secretomes are made of soluble proteins, including cytokines, chemokines, growth factors, and extracellular vesicles (EVs), which include micro-vesicles and exosomes (26). Stem cells release these secretomes by common secretory mechanisms. When the culture medium or secretome are injected into the patients, the neighboring cells assimilate the molecules by paracrine signalling (27). The exosomes themselves contain numerous bioactive molecules, which include microRNAs (miRNA), transfer RNAs (tRNA), long noncoding RNAs (lncRNA), growth factors, proteins, and lipids. The lipid content of the exosomes provide an added advantage by aiding in the infusion of the exosomes with the plasma membrane of the neighboring cells (28). The molecules involved in regulation of cell growth, proliferation, survival, and immune responses are released by exosomes, are elaborately illustrated in Fig. 2. Upon internalization of the mole-cules in the secretome, the neighboring cells modulate various downstream pathways, including immunomodulation, suppression of apoptosis, prevention of fibrosis, and remodelling of the injured tissues 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