CD90- (Thy-1-) high selection enhances reprogramming capacity of murine adipose-derived mesenchymal stem cells.

Several human studies show positive signals, while research methods and sample sizes continue to develop.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Mesenchymal stem cells (MSCs), including adipose tissue-derived mesenchymal stem cells (ADSC), are multipotent and can differentiate into various cell types possessing unique immunomodulatory features. Several clinical trials have demonstrated the safety and possible efficacy of MSCs in organ transplantation. Thus, stem cell therapy is promising for tolerance induction. In this study, we assessed the reprogramming capacity of murine ADSCs and found that CD90 (Thy-1), originally discovered as a thymocyte antigen, could be a useful marker for cell therapy. Method Murine ADSCs were isolated from B6 mice, sorted using a FACSAria cell sorter by selection of CD90(Hi) or CD90(Lo), and then transduced with four standard factors (4F; Oct4, Sox2, Klf4, and c-Myc). Results Unsorted, CD90(Hi)-sorted, and CD90(Lo)-sorted murine ADSCs were reprogrammed using standard 4F transduction. CD90(Hi) ADSCs showed increased numbers of alkaline phosphatase-positive colonies compared with CD90(Lo) ADSCs. The relative reprogramming efficiencies of unsorted, CD90(Hi)-sorted, and CD90(Lo)-sorted ADSCs were 100%, 116.5%, and 74.7%, respectively. CD90(Hi) cells were more responsive to reprogramming. Conclusion CD90(Hi) ADSCs had greater reprogramming capacity than CD90(Lo) ADSCs, suggesting that ADSCs have heterogeneous subpopulations. Thus, CD90(Hi) selection presents an effective strategy to is

Evidence level

Several human studies show positive signals, while research methods and sample sizes continue to develop.

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