Changbin Sun1,2,3, Kehua Zhang4, Jianhui Yue1,3,5, Shufang Meng4, Xi Zhang6,7. 1. BGI-Shenzhen, Jinsha Road, Dapeng New District, Shenzhen, 518083, China. 2. BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, 518083, China. 3. China National GeneBank, BGI-Shenzhen, Shenzhen, 518120, China. 4. Cell Collection and Research Center, National Institutes for Food and Drug Control, Beijing, 100050, China. 5. Section of Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark. 6. BGI-Shenzhen, Jinsha Road, Dapeng New District, Shenzhen, 518083, China. zhangxi1@genomics.cn. 7. China National GeneBank, BGI-Shenzhen, Shenzhen, 518120, China. zhangxi1@genomics.cn.
Abstract
BACKGROUND: Mesenchymal stromal cell (MSC)-based therapies are being actively investigated in various inflammatory disorders. However, functional variability among MSCs cultured in vitro will lead to distinct therapeutic efficacies. Until now, the mechanisms behind immunomodulatory functional variability in MSCs are still unclear. METHODS: We systemically investigated transcriptomic variations among MSC samples derived from multiple tissues to reveal their effects on immunomodulatory functions of MSCs. We then analyzed transcriptomic changes of MSCs licensed with INFγ to identify potential molecular mechanisms that result in distinct MSC samples with different immunomodulatory potency. RESULTS: MSCs were clustered into distinct groups showing different functional enrichment according to transcriptomic patterns. Differential expression analysis indicated that different groups of MSCs deploy common regulation networks in response to inflammatory stimulation, while expression variation of genes in the networks could lead to different immunosuppressive capability. These different responsive genes also showed high expression variability among unlicensed MSC samples. Finally, a gene panel was derived from these different responsive genes and was able to regroup unlicensed MSCs with different immunosuppressive potencies. CONCLUSION: This study revealed genes with expression variation that contribute to immunomodulatory functional variability of MSCs and provided us a strategy to identify candidate markers for functional variability assessment of MSCs.
BACKGROUND: Mesenchymal stromal cell (MSC)-based therapies are being actively investigated in various inflammatory disorders. However, functional variability among MSCs cultured in vitro will lead to distinct therapeutic efficacies. Until now, the mechanisms behind immunomodulatory functional variability in MSCs are still unclear. METHODS: We systemically investigated transcriptomic variations among MSC samples derived from multiple tissues to reveal their effects on immunomodulatory functions of MSCs. We then analyzed transcriptomic changes of MSCs licensed with INFγ to identify potential molecular mechanisms that result in distinct MSC samples with different immunomodulatory potency. RESULTS: MSCs were clustered into distinct groups showing different functional enrichment according to transcriptomic patterns. Differential expression analysis indicated that different groups of MSCs deploy common regulation networks in response to inflammatory stimulation, while expression variation of genes in the networks could lead to different immunosuppressive capability. These different responsive genes also showed high expression variability among unlicensed MSC samples. Finally, a gene panel was derived from these different responsive genes and was able to regroup unlicensed MSCs with different immunosuppressive potencies. CONCLUSION: This study revealed genes with expression variation that contribute to immunomodulatory functional variability of MSCs and provided us a strategy to identify candidate markers for functional variability assessment of MSCs.
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