Umbilical cord mesenchymal stromal cell-derived extracellular vesicles lack the potency to immunomodulate human monocyte-derived macrophages in vitro.

da Silva, Tamiris Borges, Rendra, Erika, David, Christopher AW ORCID: 0000-0001-8504-2354, Bieback, Karen, Cross, Michael J ORCID: 0000-0002-5533-1232, Wilm, Bettina ORCID: 0000-0002-9245-993X, Liptrott, Neill J ORCID: 0000-0002-5980-8966 and Murray, Patricia ORCID: 0000-0003-1316-148X (2023) Umbilical cord mesenchymal stromal cell-derived extracellular vesicles lack the potency to immunomodulate human monocyte-derived macrophages in vitro. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie, 167 (J. Imm). 115624-.

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Abstract

Mesenchymal stromal cells (MSCs) have been reported to display efficacy in a variety of preclinical models, but without long-term engraftment, suggesting a role for secreted factors, such as MSC-derived extracellular vesicles (EVs). MSCs are known to elicit immunomodulatory effects, an important aspect of which is their ability to affect macrophage phenotype. However, it is not clear if these effects are mediated by MSC-derived EVs, or other factors secreted by the MSCs. Here, we use flow cytometry to assess the effects of human umbilical cord (hUC) MSC-derived EVs on the expression of pro-inflammatory (CD80) and anti-inflammatory (CD163) surface markers in human monocyte-derived macrophages (hMDMs). hUC-MSC-derived EVs did not change the surface marker expression of the hMDMs. In contrast, when hMDMs were co-incubated with hUC-MSCs in indirect co-cultures, changes were observed in the expression of CD14, CD80 and CD163, particularly in M1 macrophages, suggesting that soluble factors are necessary to elicit a shift in phenotype. However, even though EVs did not alter the surface marker expression of macrophages, they promoted angiogenesis and phagocytic capacity increased proportionally to increases in EV concentration. Taken together, these results suggest that hUC-MSC-derived EVs are not sufficient to alter macrophage phenotype and that additional MSC-derived factors are needed.

Item Type:	Article
Uncontrolled Keywords:	Macrophages, Mesenchymal Stem Cells, Umbilical Cord, Humans, Anti-Inflammatory Agents, Extracellular Vesicles
Divisions:	Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences Faculty of Health and Life Sciences > Institute of Systems, Molecular and Integrative Biology
Depositing User:	Symplectic Admin
Date Deposited:	05 Oct 2023 14:59
Last Modified:	14 Mar 2024 20:09
DOI:	10.1016/j.biopha.2023.115624
Open Access URL:	https://doi.org/10.1016/j.biopha.2023.115624
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3173473