Title:Extracellular Vesicles Isolated from Mesenchymal Stromal Cells Primed with Hypoxia: Novel Strategy in Regenerative Medicine
Volume: 16
Issue: 3
Author(s): Shalmali Pendse, Vaijayanti Kale and Anuradha Vaidya*
Affiliation:
- Symbiosis Centre for Stem Cell Research, Symbiosis International (Deemed University), Pune 412115,India
Keywords:
Mesenchymal stromal cells, extracellular vesicles, microvesicles, exosomes, hypoxia, regenerative medicine.
Abstract: Mesenchymal stromal cells (MSCs) regulate other cell types through a strong paracrine
component called the secretome, comprising several bioactive entities. The composition of the
MSCs’ secretome is dependent upon the microenvironment in which they thrive, and hence, it
could be altered by pre-conditioning the MSCs during in vitro culture. The primary aim of this review
is to discuss various strategies that are being used for the pre-conditioning of MSCs, also
known as “priming of MSCs”, in the context of improving their therapeutic potential. Several
studies have underscored the importance of extracellular vesicles (EVs) derived from primed
MSCs in improving their efficacy for the treatment of various diseases. We have previously shown
that co-culturing hematopoietic stem cells (HSCs) with hypoxia-primed MSCs improves their engraftment
potential. Now the question we pose is, would priming of MSCs with hypoxia favorably
alter their secretome? and would this altered secretome work as effectively as the cell to cell contact
did? Here we review the current strategies of using the secretome, specifically the EVs (microvesicles
and exosomes), collected from the primed MSCs with the intention of expanding HSCs
ex vivo. We speculate that effective priming of MSCs in vitro could modulate the molecular profile
of their secretome, which could eventually be used as a cell-free biologic in clinical settings.