Pampee Young
Associate Professor of Pathology
Last active: 10/24/2017

Human mesenchymal stromal cells: identifying assays to predict potency for therapeutic selection.

Deskins DL, Bastakoty D, Saraswati S, Shinar A, Holt GE, Young PP
Stem Cells Transl Med. 2013 2 (2): 151-8

PMID: 23362238 · PMCID: PMC3659751 · DOI:10.5966/sctm.2012-0099

Multipotent mesenchymal stromal cells (MSCs) have the potential to repair and regenerate damaged tissues, making them attractive candidates for cell-based therapies. To maximize efficacy of MSCs, prediction of their therapeutic abilities must be made so that only the best cells will be used. Our goal was to identify feasible and reproducible in vitro assays to predict MSC potency. We generated cell lines from 10 normal human bone marrow samples and used the International Society for Cellular Therapy's minimal criteria to define them as MSCs: plastic adherence, appropriate surface marker expression, and trilineage differentiation. Each MSC line was further characterized by its growth, proliferation, and viability as determined by cell count, bromodeoxyuridine incorporation, and cellular ATP levels, respectively. To determine whether these tests reliably predict the therapeutic aptitude of the MSCs, several lines were implanted in vivo to examine their capacity to engraft and form granulation tissue in a well-established murine wound model using polyvinyl alcohol sponges. Long-term engraftment of MSCs in the sponges was quantified through the presence of the human-specific Alu gene in sponge sections. Sections were also stained for proliferating cells, vascularity, and granulation tissue formation to determine successful engraftment and repair. We found that high performance in a combination of the in vitro tests accurately predicted which lines functioned well in vivo. These findings suggest that reliable and reproducible in vitro assays may be used to measure the functional potential of MSCs for therapeutic use.

MeSH Terms (21)

Adult Aged Aged, 80 and over Animals Biomarkers Bone Marrow Cells Cell Differentiation Cell Proliferation Disease Models, Animal Female Flow Cytometry Humans Male Mesenchymal Stem Cells Mesenchymal Stem Cell Transplantation Mice Middle Aged Multipotent Stem Cells Predictive Value of Tests Reproducibility of Results Skin

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