Extracellular vesicles derived from human gingival mesenchymal stem cells: a transcriptomic analysis

The human Gingival Mesenchymal Stem Cells (hGMSCs) have outstanding characteristics of proliferation and are able to differentiate into osteogenic, chondrogenic, adipogenic and neurogenic cell lineages. The extracellular vesicles (EVs) secreted by hGMSCs contain proteins, lipids, mRNA and microRNA that have emerged as important mediators of cell-to-cell communication. In this study, we analysed the transcriptome of hGMSCs-derived EVs using Next Generation Sequencing (NGS). The functional evaluation of the transcriptome highlighted 26 structural protein classes and the presence of "Non-coding RNAs". Our results showed that EVs contain several growth factors such as Transforming Growth Factor-beta (TGF-b), Fibroblast Growth Factor (FGF) and Vascular Endothelial Growth Factors (VEGF) implicated in osteoblast differentiation and in angiogenetic process. Furthermore, the transcriptomic analysis showed the presence of Glial cell-Derived Neurotrophic Factor (GDNF) family ligands and Neurotrophins involved in neuronal development. The NGS analysis also identified the presence of several interleukins among which some with anti-inflammatory action. Moreover, the transcriptome profile of EVs contained members of the Wnt family, involved in several biological processes, such as cellular proliferation and tissue regeneration. In conclusion, the huge amount of growth factors included in the hGMSCs-derived EVs could make them a big resource in regenerative medicine.