Journal of microbiology (Seoul, Korea)

Reovirus safety study for proliferation and differentiation of human adipose-derived mesenchymal stem cells.

PMID 28035603


Naturally occurring reoviruses are live replication-proficient viruses specifically infecting human cancer cells while sparing the normal counterparts. Stem cells can be highly susceptible to viral infection due to their innate high proliferation potential and other active signaling pathways of cells that might be involved in viral tropism. In the previous study, we showed that reoviruses could adversely affect murine embryonic stem cells' integrity in vitro and in vivo. Oncolytic viruses, delivered systemically face many hurdles that also impede their localization and infection of, metastatic tumors, due to a variety of immune and physical barriers. To overcome such hurdles to systemic delivery, several studies supported the idea that certain types of cells, including mesenchymal stem cells, might play a role as cell carriers for oncolytic viruses. Thus, it would be interesting to examine whether human adult stem cells such as human adipose-derived mesenchymal stem cells could be saved by the reoviral challenge. In this study, we report that biological activities such as proliferation and multipotency of human adipose-derived stem cells are not affected by wild-type reovirus challenge as evidenced by survival, osteogenic and adipogenic differentiation potential assays following treatment with reoviruses. Therefore, unlike murine embryonic stem cells, our study strongly suggests that human adipose-derived adult stem cells could be spared in vivo during wild-type reoviral anti-cancer therapeutics in a clinical setting. Furthermore, the results support the possible clinical use of human adipose-derived stem cells as an effective cell carrier of oncolytic reovirus to maximize their tumor tropism and anti-tumor activity.

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